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Mounted BBO Crystals
Unmounted BBO Crystals
BBO crystal transmittance curve
BBO crystal Coating Curve
BBO Crystal - Chinese Brand

  • Chinese brand BBO crystal for second frequency generation Application.

  • As a expert in nonlinear crystals, CRYSMIT offers high-quality BBO crystals at a competitive price.

  • Maximum Large size 20x20x10 mm3 for BBO coated crystals.

  • Ultrathin BBO (Thinnest 5um) crystals for Femtosecond Lasers. 

  • A large quantity of BBO crystals in stock for fast delivery time.

  • Custom BBO nonlinear crystal size and advanced coating technology ensures high damage thresholds.

  • Offer sample , technical support and testing report for BBO nonlinear optical crystal for free.

  • Quantity discounts: for the same product, purchase 5 pieces for a 5% discount, and 10 pieces for a 10% discount.

Inquire for custom product
General Product
For Ti:Sapphire Laser Application
For Yb:KGW/KYW Laser Application
Overview
10 Step BBO Crystal Guide

CRYSMIT provide a variety of BBO crystals for second harmonic generation, third harmonic generation, and fourth harmonic generation for lasers at 1064nm, 1030nm, and 800nm.  

✓ Shop now with CRYSMTI OPTICS !

Part No.
Material
Face Dimensions
Thickness
Theta
Phi
Application
Coating
Delivery
Price
Add to CART
Part No. Material Face Dimensions Thickness Theta Phi Application Coating Delivery Price Add to CART
BBO Crystal CY01 β-BBO 6x6 mm 0.005 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $300
BBO Crystal CY02 β-BBO 6x6 mm 0.05 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $200
BBO Crystal CY03 β-BBO 6x6 mm 0.1 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $200
BBO Crystal CY04 β-BBO 6x6 mm 0.5 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $200
BBO Crystal CY05 β-BBO 6x6 mm 1 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $200
BBO Crystal CY06 β-BBO 6x6 mm 2 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $250
BBO Crystal CY07 β-BBO 10x10 mm 0.005 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $550
BBO Crystal CY08 β-BBO 10x10 mm 0.05 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $500
BBO Crystal CY09 β-BBO 10x10 mm 0.1 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $500
BBO Crystal CY10 β-BBO 10x10 mm 0.5 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $500
BBO Crystal CY11 β-BBO 10x10 mm 1 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $500
BBO Crystal CY12 β-BBO 10x10 mm 2 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $550
BBO Crystal CY13 β-BBO 15x15 mm 0.05 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $650
BBO Crystal CY14 β-BBO 15x15 mm 0.1 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $650
BBO Crystal CY15 β-BBO 15x15 mm 0.5 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $650
BBO Crystal CY16 β-BBO 15x15 mm 1 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $650
BBO Crystal CY17 β-BBO 15x15 mm 2 mm 29.2° 90° Type 1, SHG@800nm P/P@400-800nm 2 weeks $700
BBO Crystal CY18 β-BBO 6x6 mm 0.005 mm 44.3° 90° Type 1, THG@800nm P/P@400-800/266nm 2 weeks $300
BBO Crystal CY19 β-BBO 6x6 mm 0.01 mm 44.3° 90° Type 1, THG@800nm P/P@400-800/266nm 2 weeks $200
BBO Crystal CY20 β-BBO 6x6 mm 0.05 mm 44.3° 90° Type 1, THG@800nm P/P@400-800/266nm 2 weeks $200
BBO Crystal CY21 β-BBO 6x6 mm 0.1 mm 44.3° 90° Type 1, THG@800nm P/P@400-800/266nm 2 weeks $200
BBO Crystal CY22 β-BBO 6x6 mm 0.5 mm 44.3° 90° Type 1, THG@800nm P/P@400-800/266nm 2 weeks $200
BBO Crystal CY23 β-BBO 6x6 mm 1 mm 44.3° 90° Type 1, THG@800nm P/P@400-800/266nm 2 weeks $300
BBO Crystal CY24 β-BBO 10x10 mm 0.005 mm 44.3° 90° Type 1, THG@800nm P/P@400-800/266nm 2 weeks $550
BBO Crystal CY25 β-BBO 10x10 mm 0.01 mm 44.3° 90° Type 1, THG@800nm P/P@400-800/266nm 2 weeks $500
BBO Crystal CY26 β-BBO 10x10 mm 0.05 mm 44.3° 90° Type 1, THG@800nm P/P@400-800/266nm 2 weeks $500
BBO Crystal CY27 β-BBO 10x10 mm 0.1 mm 44.3° 90° Type 1, THG@800nm P/P@400-800/266nm 2 weeks $500
BBO Crystal CY28 β-BBO 10x10 mm 0.5 mm 44.3° 90° Type 1, THG@800nm P/P@400-800/266nm 2 weeks $500
BBO Crystal CY29 β-BBO 10x10 mm 1 mm 44.3° 90° Type 1, THG@800nm P/P@400-800/266nm 2 weeks $500
BBO Crystal CY30 β-BBO 6x6 mm 0.005 mm 23.4° 90° Type 1, SHG@1030nm AR/AR@515+1030nm 2 weeks $200
BBO Crystal CY31 β-BBO 6x6 mm 0.5 mm 23.4° 90° Type 1, SHG@1030nm AR/AR@515+1030nm 2 weeks $200
BBO Crystal CY32 β-BBO 6x6 mm 1 mm 23.4° 90° Type 1, SHG@1030nm AR/AR@515+1030nm 2 weeks $200
BBO Crystal CY33 β-BBO 6x6 mm 1.5 mm 23.4° 90° Type 1, SHG@1030nm AR/AR@515+1030nm 2 weeks $200
BBO Crystal CY34 β-BBO 6x6 mm 2 mm 23.4° 90° Type 1, SHG@1030nm AR/AR@515+1030nm 2 weeks $250
BBO Crystal CY35 β-BBO 6x6 mm 3 mm 23.4° 90° Type 1, SHG@1030nm AR/AR@515+1030nm 2 weeks $300
BBO Crystal CY36 β-BBO 10x10 mm 0.005 mm 23.4° 90° Type 1, SHG@1030nm AR/AR@515+1030nm 2 weeks $550
BBO Crystal CY37 β-BBO 10x10 mm 0.5 mm 23.4° 90° Type 1, SHG@1030nm AR/AR@515+1030nm 2 weeks $500
BBO Crystal CY38 β-BBO 10x10 mm 1 mm 23.4° 90° Type 1, SHG@1030nm AR/AR@515+1030nm 2 weeks $500
BBO Crystal CY39 β-BBO 10x10 mm 1.5 mm 23.4° 90° Type 1, SHG@1030nm AR/AR@515+1030nm 2 weeks $500
BBO Crystal CY40 β-BBO 10x10 mm 2 mm 23.4° 90° Type 1, SHG@1030nm AR/AR@515+1030nm 2 weeks $550
BBO Crystal CY41 β-BBO 10x10 mm 3 mm 23.4° 90° Type 1, SHG@1030nm AR/AR@515+1030nm 2 weeks $600
BBO Crystal CY42 β-BBO 6x6 mm 0.15 mm 32.5° 90° Type 1, THG@1030nm P/P@515-1030/343nm 2 weeks $200
BBO Crystal CY43 β-BBO 6x6 mm 0.25 mm 32.5° 90° Type 1, THG@1030nm P/P@515-1030/343nm 2 weeks $200
BBO Crystal CY44 β-BBO 6x6 mm 0.4 mm 32.5° 90° Type 1, THG@1030nm P/P@515-1030/343nm 2 weeks $200
BBO Crystal CY45 β-BBO 6x6 mm 0.55 mm 32.5° 90° Type 1, THG@1030nm P/P@515-1030/343nm 2 weeks $200
BBO Crystal CY46 β-BBO 10x10 mm 0.15 mm 32.5° 90° Type 1, THG@1030nm P/P@515-1030/343nm 2 weeks $500
BBO Crystal CY47 β-BBO 10x10 mm 0.25 mm 32.5° 90° Type 1, THG@1030nm P/P@515-1030/343nm 2 weeks $500
BBO Crystal CY48 β-BBO 10x10 mm 0.4 mm 32.5° 90° Type 1, THG@1030nm P/P@515-1030/343nm 2 weeks $500
BBO Crystal CY49 β-BBO 10x10 mm 0.55 mm 32.5° 90° Type 1, THG@1030nm P/P@515-1030/343nm 2 weeks $500
BBO Crystal CY50 β-BBO 6x6 mm 0.1 mm 50° 90° Type 1, FHG@1030nm P/P@515/257nm 2 weeks $200
BBO Crystal CY51 β-BBO 6x6 mm 0.15 mm 50° 90° Type 1, FHG@1030nm P/P@515/257nm 2 weeks $200
BBO Crystal CY52 β-BBO 6x6 mm 0.2 mm 50° 90° Type 1, FHG@1030nm P/P@515/257nm 2 weeks $200
BBO Crystal CY53 β-BBO 6x6 mm 0.3 mm 50° 90° Type 1, FHG@1030nm P/P@515/257nm 2 weeks $200
BBO Crystal CY54 β-BBO 10x10 mm 0.1 mm 50° 90° Type 1, FHG@1030nm P/P@515/257nm 2 weeks $500
BBO Crystal CY55 β-BBO 10x10 mm 0.15 mm 50° 90° Type 1, FHG@1030nm P/P@515/257nm 2 weeks $500
BBO Crystal CY56 β-BBO 10x10 mm 0.2 mm 50° 90° Type 1, FHG@1030nm P/P@515/257nm 2 weeks $500
BBO Crystal CY57 β-BBO 10x10 mm 0.3 mm 50° 90° Type 1, FHG@1030nm P/P@515/257nm 2 weeks $500
BBO Crystal CY58 β-BBO 6x6 mm 0.005 mm 22.8° 90° Type 1, SHG@1064nm AR/AR@532+1064nm 2 weeks $300
BBO Crystal CY59 β-BBO 6x6 mm 0.5 mm 22.8° 90° Type 1, SHG@1064nm AR/AR@532+1064nm 2 weeks $200
BBO Crystal CY60 β-BBO 6x6 mm 1 mm 22.8° 90° Type 1, SHG@1064nm AR/AR@532+1064nm 2 weeks $200
BBO Crystal CY61 β-BBO 6x6 mm 1.5 mm 22.8° 90° Type 1, SHG@1064nm AR/AR@532+1064nm 2 weeks $200
BBO Crystal CY62 β-BBO 6x6 mm 2 mm 22.8° 90° Type 1, SHG@1064nm AR/AR@532+1064nm 2 weeks $200
BBO Crystal CY63 β-BBO 6x6 mm 3 mm 22.8° 90° Type 1, SHG@1064nm AR/AR@532+1064nm 2 weeks $200
BBO Crystal CY64 β-BBO 10x10 mm 0.005 mm 22.8° 90° Type 1, SHG@1064nm AR/AR@532+1064nm 2 weeks $550
BBO Crystal CY65 β-BBO 10x10 mm 0.5 mm 22.8° 90° Type 1, SHG@1064nm AR/AR@532+1064nm 2 weeks $500
BBO Crystal CY66 β-BBO 10x10 mm 1 mm 22.8° 90° Type 1, SHG@1064nm AR/AR@532+1064nm 2 weeks $500
BBO Crystal CY67 β-BBO 10x10 mm 1.5 mm 22.8° 90° Type 1, SHG@1064nm AR/AR@532+1064nm 2 weeks $500
BBO Crystal CY68 β-BBO 10x10 mm 2 mm 22.8° 90° Type 1, SHG@1064nm AR/AR@532+1064nm 2 weeks $550
BBO Crystal CY69 β-BBO 10x10 mm 3 mm 22.8° 90° Type 1, SHG@1064nm AR/AR@532+1064nm 2 weeks $600
BBO Crystal CY70 β-BBO 6x6 mm 0.05 mm 31.3° 90° Type 1, THG@1064nm P/P@532-1064/355nm 2 weeks $200
BBO Crystal CY71 β-BBO 6x6 mm 1 mm 31.3° 90° Type 1, THG@1064nm P/P@532-1064/355nm 2 weeks $200
BBO Crystal CY72 β-BBO 10x10 mm 0.05 mm 31.3° 90° Type 1, THG@1064nm P/P@532-1064/355nm 2 weeks $500
BBO Crystal CY73 β-BBO 10x10 mm 1 mm 31.3° 90° Type 1, THG@1064nm P/P@532-1064/355nm 2 weeks $500
BBO Crystal CY74 β-BBO 6x6 mm 5 mm 47.7° 90° Type 1, FHG@1064nm P/P@532/266nm 2 weeks $400
BBO Crystal CY75 β-BBO 6x6 mm 6 mm 47.7° 90° Type 1, FHG@1064nm P/P@532/266nm 2 weeks $500
BBO Crystal CY76 β-BBO 6x6 mm 0.5 mm 22.7° 90° Type 1 Phase Matching, OPA P/P@1600-2600/800-1300nm 2 weeks $200
BBO Crystal CY77 β-BBO 6x6 mm 2 mm 31.5° 90° SHG for Alexandrite laser P/P@400-800nm 2 weeks $250
BBO Crystal CY78 β-BBO 8x8 mm 2.5 mm 23.4° 90° SHG for for Yb:KGW/KYW Laser P/P@1030/515nm 2 weeks $400
BBO Crystal CY79 β-BBO 10x10 mm 13 mm 52° 90° SHG for Argon Ion Laser P/P@300-600nm 2 weeks $1500
BBO Crystal CY80 β-BBO 11x11 13 mm 32.8° 90° Frequency Doubling P/P@400-800nm 2 weeks $1650
BBO Crystal CY81 β-BBO 6x6 mm 1 mm 28° 0° Type 2 Phase Matching, OPO P/P800-2400nm 2 weeks $300
BBO Crystal CY82 β-BBO 6x6 mm 2 mm 28° 0° Type 2 Phase Matching, OPO P/P800-2400nm 2 weeks $300
BBO Crystal CY83 β-BBO 6x6 mm 2 mm 32° 0° Type 2 Phase Matching, OPO P/P400-700nm 2 weeks $300
BBO Crystal CY84 β-BBO 7x7 mm 3 mm 28° 0° Type 2 Phase Matching, OPO P/P800-2400nm 2 weeks $350
BBO Crystal CY85 β-BBO 8x8 mm 2 mm 28° 0° Type 2 Phase Matching, OPO P/P800-2400nm 2 weeks $300
BBO Crystal CY86 β-BBO 10x10 mm 2 mm 28° 0° Type 2 Phase Matching, OPO P/P800-2400nm 2 weeks $550
BBO Crystal CY87 β-BBO 18x18 mm 1.5 mm 28° 0° Type 2 Phase Matching, OPO P/P800-2400nm 2 weeks $800
BBO Crystal CY88 β-BBO 20x20 mm 3 mm 28° 0° Type 2 Phase Matching, OPO P/P800-2400nm 2 weeks $1300
BBO Crystal CY89 β-BBO 8x5 mm 7 mm 34° 90° SHG for Dye laser P/P@300-500nm 2 weeks $380
BBO Crystal CY90 β-BBO 8x5 mm 7 mm 52° 90° SHG for Dye laser P/P@250-400nm 2 weeks $380
BBO Crystal CY91 β-BBO 8x5 mm 7 mm 72° 90° SHG for Dye laser P/P@200-300nm 2 weeks $380
BBO Crystal CY92 β-BBO 10x8 mm 7 mm 34° 90° SHG for Dye laser P/P@300-500nm 2 weeks $620
BBO Crystal CY93 β-BBO 10x8 mm 7 mm 52° 90° SHG for Dye laser P/P@250-400nm 2 weeks $620
BBO Crystal CY94 β-BBO 10x8 7 mm 72° 90° SHG for Dye laser P/P@200-300nm 2 weeks $620
BBO Crystal CY95 β-BBO 10x10 mm 15 mm 22.8° 90° Frequency Doubling P/P@(532-1075)nm 2 weeks $1600
BBO Crystal CY96 β-BBO 10x8 mm 17 mm 28.5° 90° Frequency Doubling P-Coating 2 weeks $1600
BBO Crystal CY97 β-BBO 15x10 mm 15 mm 36.7° 90° Frequency Doubling P/P@300-400nm 2 weeks $2250
BBO Crystal CY98 β-BBO 16x11 mm 15 mm 38° 0° Type 2 Phase Matching, OPA P-Coating 2 weeks $2500

CRYSMIT manufactures various thin BBO crystals for second harmonic generation and third harmonic generation in titanium sapphire femtosecond laser systems. 

✓ Shop now with CRYSMTI OPTICS !

Part No.
Material
Face Dimensions
Thickness
Theta
Phi
Application
Coating
Delivery
Price
Add to CART
Part No. Material Face Dimensions Thickness Theta Phi Application Coating Delivery Price Add to CART
BBO Crystal TS01 β-BBO 6x6 mm 0.005 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $300
BBO Crystal TS02 β-BBO 8x8 mm 0.005 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $350
BBO Crystal TS03 β-BBO 10x10 mm 0.005 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $500
BBO Crystal TS04 β-BBO 6x6 mm 0.01 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $200
BBO Crystal TS05 β-BBO 8x8 mm 0.01 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $300
BBO Crystal TS06 β-BBO 10x10 mm 0.01 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $450
BBO Crystal TS07 β-BBO 6x6 mm 0.02 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $200
BBO Crystal TS08 β-BBO 8x8 mm 0.02 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $300
BBO Crystal TS09 β-BBO 10x10 mm 0.02 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $450
BBO Crystal TS10 β-BBO 6x6 mm 0.05 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $200
BBO Crystal TS11 β-BBO 8x8 mm 0.05 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $300
BBO Crystal TS12 β-BBO 10x10 mm 0.05 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $450
BBO Crystal TS13 β-BBO 6x6 mm 0.1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $200
BBO Crystal TS14 β-BBO 8x8 mm 0.1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $300
BBO Crystal TS15 β-BBO 10x10 mm 0.1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $450
BBO Crystal TS16 β-BBO 12x12 mm 0.1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $600
BBO Crystal TS17 β-BBO 15x15 mm 0.1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $700
BBO Crystal TS18 β-BBO 20x20 mm 0.1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $1100
BBO Crystal TS19 β-BBO 22x22 mm 0.1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $1200
BBO Crystal TS20 β-BBO 6x6 mm 0.2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $200
BBO Crystal TS21 β-BBO 8x8 mm 0.2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $300
BBO Crystal TS22 β-BBO 10x10 mm 0.2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $450
BBO Crystal TS23 β-BBO 12x12 mm 0.2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $550
BBO Crystal TS24 β-BBO 15x15 mm 0.2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $700
BBO Crystal TS25 β-BBO 20x20 mm 0.2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $1100
BBO Crystal TS26 β-BBO 22x22 mm 0.2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $1200
BBO Crystal TS27 β-BBO 6x6 mm 0.5 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $200
BBO Crystal TS28 β-BBO 8x8 mm 0.5 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $300
BBO Crystal TS29 β-BBO 10x10 mm 0.5 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $450
BBO Crystal TS30 β-BBO 12x12 mm 0.5 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $550
BBO Crystal TS31 β-BBO 15x15 mm 0.5 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $700
BBO Crystal TS32 β-BBO 20x20 mm 0.5 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $1100
BBO Crystal TS33 β-BBO 22x22 mm 0.5 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $1200
BBO Crystal TS34 β-BBO 6x6 mm 1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $200
BBO Crystal TS35 β-BBO 8x8 mm 1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $300
BBO Crystal TS36 β-BBO 10x10 mm 1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $450
BBO Crystal TS37 β-BBO 12x12 mm 1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $550
BBO Crystal TS38 β-BBO 15x15 mm 1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $700
BBO Crystal TS39 β-BBO 20x20 mm 1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $1100
BBO Crystal TS40 β-BBO 22x22 mm 1 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $1200
BBO Crystal TS41 β-BBO 6x6 mm 2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $250
BBO Crystal TS42 β-BBO 8x8 mm 2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $350
BBO Crystal TS43 β-BBO 10x10 mm 2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $500
BBO Crystal TS44 β-BBO 12x12 mm 2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $600
BBO Crystal TS45 β-BBO 15x15 mm 2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $750
BBO Crystal TS46 β-BBO 20x20 mm 2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $1200
BBO Crystal TS47 β-BBO 22x22 mm 2 mm 29.2° 90° SHG for Ti:Sapphire Laser P/P@400-800nm 2 weeks $1300
BBO Crystal TT01 β-BBO 6x6 mm 0.005 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $300
BBO Crystal TT02 β-BBO 8x8 mm 0.005 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $350
BBO Crystal TT03 β-BBO 10x10 mm 0.005 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $500
BBO Crystal TT04 β-BBO 6x6 mm 0.01 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $200
BBO Crystal TT05 β-BBO 8x8 mm 0.01 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $300
BBO Crystal TT06 β-BBO 10x10 mm 0.01 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $450
BBO Crystal TT07 β-BBO 6x6 mm 0.02 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $200
BBO Crystal TT08 β-BBO 8x8 mm 0.02 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $300
BBO Crystal TT09 β-BBO 10x10 mm 0.02 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $450
BBO Crystal TT10 β-BBO 6x6 mm 0.05 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $200
BBO Crystal TT11 β-BBO 8x8 mm 0.05 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $300
BBO Crystal TT12 β-BBO 10x10 mm 0.05 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $450
BBO Crystal TT13 β-BBO 6x6 mm 0.1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $200
BBO Crystal TT14 β-BBO 8x8 mm 0.1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $300
BBO Crystal TT15 β-BBO 10x10 mm 0.1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $450
BBO Crystal TT16 β-BBO 12x12 mm 0.1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $550
BBO Crystal TT17 β-BBO 15x15 mm 0.1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $700
BBO Crystal TT18 β-BBO 20x20 mm 0.1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $1100
BBO Crystal TT19 β-BBO 22x22 mm 0.1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $1200
BBO Crystal TT20 β-BBO 6x6 mm 0.2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $200
BBO Crystal TT21 β-BBO 8x8 mm 0.2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $300
BBO Crystal TT22 β-BBO 10x10 mm 0.2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $450
BBO Crystal TT23 β-BBO 12x12 mm 0.2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $550
BBO Crystal TT24 β-BBO 15x15 mm 0.2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $700
BBO Crystal TT25 β-BBO 20x20 mm 0.2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $1100
BBO Crystal TT26 β-BBO 22x22 mm 0.2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $1200
BBO Crystal TT27 β-BBO 6x6 mm 0.5 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $200
BBO Crystal TT28 β-BBO 8x8 mm 0.5 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $300
BBO Crystal TT29 β-BBO 10x10 mm 0.5 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $450
BBO Crystal TT30 β-BBO 12x12 mm 0.5 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $550
BBO Crystal TT31 β-BBO 15x15 mm 0.5 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $700
BBO Crystal TT32 β-BBO 20x20 mm 0.5 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $1100
BBO Crystal TT33 β-BBO 22x22 mm 0.5 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $1200
BBO Crystal TT34 β-BBO 6x6 mm 1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $200
BBO Crystal TT35 β-BBO 8x8 mm 1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $300
BBO Crystal TT36 β-BBO 10x10 mm 1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $450
BBO Crystal TT37 β-BBO 12x12 mm 1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $550
BBO Crystal TT38 β-BBO 15x15 mm 1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $700
BBO Crystal TT39 β-BBO 20x20 mm 1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $1100
BBO Crystal TT40 β-BBO 22x22 mm 1 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $1200
BBO Crystal TT41 β-BBO 6x6 mm 2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $250
BBO Crystal TT42 β-BBO 8x8 mm 2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $350
BBO Crystal TT43 β-BBO 10x10 mm 2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $500
BBO Crystal TT44 β-BBO 12x12 mm 2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $600
BBO Crystal TT45 β-BBO 15x15 mm 2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $750
BBO Crystal TT46 β-BBO 20x20 mm 2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $1200
BBO Crystal TT47 β-BBO 22x22 mm 2 mm 44.3° 90° THG for Ti:Sapphire Laser P/P@400-800/266nm 2 weeks $1300

CRYSMIT manufactures various BBO crystals for second harmonic generation, third harmonic generation and four harmonic generation in Yb:KGW Laser and Yb:KYW Laser.

✓ Buy BBO crystal now with CRYSMTI OPTICS

Part No.
Material
Face Dimensions
Thickness
Theta
Phi
Application
Coating
Delivery
Price
Add to CART
Part No. Material Face Dimensions Thickness Theta Phi Application Coating Delivery Price Add to CART
BBO crystal YS01 β-BBO 6x6 mm 0.5 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $200
BBO crystal YS02 β-BBO 8x8 mm 0.5 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $300
BBO crystal YS03 β-BBO 10x10 mm 0.5 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $450
BBO crystal YS04 β-BBO 6x6 mm 1 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $200
BBO crystal YS05 β-BBO 8x8 mm 1 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $300
BBO crystal YS06 β-BBO 10x10 mm 1 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $450
BBO crystal YS07 β-BBO 6x6 mm 1.5 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $200
BBO crystal YS08 β-BBO 8x8 mm 1.5 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $300
BBO crystal YS09 β-BBO 10x10 mm 1.5 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $450
BBO crystal YS10 β-BBO 6x6 mm 2 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $200
BBO crystal YS11 β-BBO 8x8 mm 2 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $300
BBO crystal YS12 β-BBO 10x10 mm 2 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $450
BBO crystal YS13 β-BBO 6x6 mm 3 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $200
BBO crystal YS14 β-BBO 8x8 mm 3 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $300
BBO crystal YS15 β-BBO 10x10 mm 3 mm 23.4° 90° SHG for Yb:KGW/KYW Laser AR/AR@515+1030nm 2 weeks $450
BBO crystal YT01 β-BBO 6x6 mm 0.15 mm 32.5° 90° THG for Yb:KGW/KYW Laser P/P@515-1030/343nm 2 weeks $200
BBO crystal YT02 β-BBO 6x6 mm 0.25 mm 32.5° 90° THG for Yb:KGW/KYW Laser P/P@515-1030/343nm 2 weeks $200
BBO crystal YT03 β-BBO 6x6 mm 0.4 mm 32.5° 90° THG for Yb:KGW/KYW Laser P/P@515-1030/343nm 2 weeks $200
BBO crystal YT04 β-BBO 6x6 mm 0.55 mm 32.5° 90° THG for Yb:KGW/KYW Laser P/P@515-1030/343nm 2 weeks $200
BBO crystal YF01 β-BBO 6x6 mm 0.1 mm 50° 90° FHG for Yb:KGW/KYW Laser P/P@515/257nm 2 weeks $200
BBO crystal YF02 β-BBO 6x6 mm 0.15 mm 50° 90° FHG for Yb:KGW/KYW Laser P/P@515/257nm 2 weeks $200
BBO crystal YF03 β-BBO 6x6 mm 0.2 mm 50° 90° FHG for Yb:KGW/KYW Laser P/P@515/257nm 2 weeks $200
BBO crystal YF04 β-BBO 6x6 mm 0.3 mm 50° 90° FHG for Yb:KGW/KYW Laser P/P@515/257nm 2 weeks $200

CRYSMIT OPTICS is a professional supplier of “Chinese brand BBO crystals”. As a Chinese expert in BBO nonlinear crystals manufacturer, CRYSMIT offers high-quality BBO crystals at competitive prices. We offer BBO coated crystals with a maximum processing size of 20x20x10 mm3. Additionally, we are specialize in ultrathin BBO crystals with a minimum thickness of 5um designed for femtosecond lasers.


β-BaB2O4 (BBO, Beta barium borate) is a widely used nonlinear crystal for frequency conversion in the UV, visible and NIR. Crysmit's BBO Crystals feature:

  • Wide transmission from 190nm to 3500nm （Fig.1 and Fig.2）

  • Broad phase-matching range from 409.6nm to 3500nm 

  • large birefringence and High optical homogeneity

  • BBO crystal second harmonic generation

  • Wide phase-matching range and Wide temperature bandwidth

  • Large nonlinear optical effects

  • A frequency multiplication factor six times higher than that of KDP crystals

  • High damage threshol


BBO crystal transmittance curve.webp   BBO crystal transmittance curve in UV band.webp

                                      Fig.1. BBO crystal transmittance curve.                                                      Fig.2. BBO crystal transmittance curve in UV band.


Applications of BBO Crystals in the field of Nonlinear Crystals:


  • BBO for Second, Third, Fourth, and Fifth Harmonic Generation of Nd: YAG Lasers : Exceptional conversion efficiencies could be achieved using BBO crystals, which are greater than 70% (SHG), 60% for THG, 50% for 4thHG. BBO crystal is the best option for 213nm 5HG.BBO crystals excel in the ability to handle intracavity SHG of Nd:YAG lasers with high power densities to generate 532nm output. And 266nm output with a decent power level could be attained using a Brewster-angle-cut BBO crystal when pumping the Nd:YAG Laser with an SHG output of a mode-locked Nd:YLF laser. Because of a small acceptance angle and large angular walk off, good laser beam quality (small divergence, good mode condition, etc.) is the crucial factor for BBO to function better, tight focusing of laser beams is not recommended.


  • Femtosecond Lasers: For SHG and THG of Femtosecond Lasers, BBO also exhibits a great advantage over KDP and ADP crystals.


  • Dye Lasers：BBO crystal is an effective media for SHG of XeCl-laser pumped Dye lasers for giving output in the ultra-violet spectrum (205-310nm).


  • SHG/THG of Alexandrite Lasers and SHG/THG/FHG of Ti:Sapphire Lasers ：SHG/THG of Alexandrite Lasers UV output in the region 360nm-390 nm and output in the region 244nm - 259 nm. SHG/THG/FHG of Ti:Sapphire Lasers could also be realized efficiently.


  • Intracavity SHG of Argon Doped Lasers and SHG of Copper-Vapor Lasers：Intracavity SHG of Argon Doped Lasers for UV and Deep-UV output, and SHG of Copper-Vapor Lasers for UV output.


  • Optical Parametric Oscillation (OPO) / Optical Parametric Amplification (OPA): Utilizing BBO crystals for optical parametric oscillation(OPO) and parametric optical amplification (OPA), one could easily obtain tunable output in a broad wavelength range (from the UV to IR). Common applications include: （1）OPO of 532nm pumped lasers for output ranging from 680 nm to 2400 nm and （2）OPO and OPA of 355nm Nd:YAG pumped lasers


CRYSMIT's BBO crystal Standard Speficication

SizeCrystal length from 0.005 mm to 25 mm and size up to 15x15x15 mm3
Dimension Tolerance(W±0.1mm) x ( H±0.1mm) x (L+0.2mm/-0.1mm)
Phase Matching Angle ToleranceΔθ＜ 0.25°, Δφ＜ 0.25°
Flatnessλ/10 @ 633nm
Transmitted Wavefront Distortionλ/8 @ 633nm
Surface Quality10/5 Scratch/Dig per MIL-PRF-13830B
Parallelism＜ 20 arc seconds
Perpendicularity＜ 5 arc minutes
Clear Aperture90% central area
Edge Bevel0.15mm x 45°±5°
AR CoatingR < 0.2% @ 1064nm, R < 0.5% @ 532nm
Damage threshold＞1GW/cm2 for 1064nm, TEM00, 10ns, 10HZ (polished only)
＞0.5GW/cm2 for 1064nm, TEM00, 10ns, 10HZ (AR-coated)
＞0.3GW/cm2 for 532nm, TEM00, 10ns, 10HZ (AR-coated)
Quality Warranty PeriodOne year under proper use.


BBO Crystal Structure

Crystal StructureTrigonal，Space Group R3c
Lattice Parametera=b=12.532Å,c=12.717Å,Z=6
Melting PointAbout 1095℃
Mohs Hardness4
Density3.85 g/cm3
Thermal Expansion Coefficientsα11=4 x 10-6/K; α33=36x 10-6/K
Thermal Conductivity⊥c: 1.2W/m/K;    //c: 1.6W/m/K

BBO crystal properties

Transparency Range190-3500nm
SHG Phase Matchable Range409.6-3500nm  (Type I)      525-3500nm (Type II)
Thermal-optic Coefficients (/℃)dno/dT=-16.6x 10-6/℃
dne/dT=-9.3x 10-6/℃
Absorption Coefficients<0.1%/cm(at 1064nm)  <1%/cm(at 532nm)
Angle Acceptance0.8mrad·cm  (θ, Type I, 1064 SHG)
1.27mrad·cm  (θ, Type II, 1064 SHG)
Temperature Acceptance55℃·cm
Spectral Acceptance1.1nm·cm
Walk-off Angle2.7° (Type I  1064 SHG)
3.2° (Type II  1064 SHG)
NLO Coefficientsdeff(I)=d31sinθ+(d11cos3Φ- d22 sin3Φ) cosθ
deff (II)= (d11 sin3Φ + d22 cos3Φ) cos2θ
Non-vanished NLO susceptibilitiesd11 = 5.8 x d36(KDP)
d31 = 0.05 x d11
d22 < 0.05 x d11
Sellmeier  Equations
(λ in μm)		no2=2.7359+0.01878/(λ2-0.01822)-0.01354λ2
ne2=2.3753+0.01224/(λ2-0.01667)-0.01516λ2
Electro-optic coefficientsγ22 = 2.7 pm/V
Half-wave voltage7 KV (at 1064 nm,3x3x20mm3)
Resistivity>1011 ohm·cm
Relative Dielectric Constantεs11 / εo : 6.7
εs33 / εo : 8.1
Tanδ<0.001

1. What is a china BBO Crystals ?   

Chinese brand Barium borate (BaB2O4) was discovered and developed by Chen Chuangtian and others of the Fujian Institute of Research on the Structure of Matter (Fujian CASTECH Crystals), Chinese Academy of Sciences in1980. Barium borate (BaB2O4) is a type of borate mineral that can crystallize in two different forms: alpha-Barium borate (α-BBO) and beta-Barium borate (β-BBO):

  • α-Barium borate (α-BBO): This is a lower temperature phase that can be stable up to 925 degrees Celsius.α-Barium borate, α-BaB2O4, is an excellent birefringent crystal material with a very wide optical transmission window. With good mechanical properties, it is a suitable material for high power UV polarized optics. It is commonly used in Glan-Taylor prisms, Glan-Thompson prisms, Wollaston Polarizers, Spatial Compensators and Time Delay Compensators.

  • β-Barium borate (β-BBO or simply BBO): This is the high-temperature phase and can be stable at temperatures above 925 degrees Celsius. The β-BBO has exceptional nonlinear optical properties With Wide transmission from 190nm to 3500nm and Broad phase-matching range from 409.6nm to 3500nm and is widely used in many areas of physics and engineering.The β-BBO is the form that is typically referred to when discussing "BBO crystals" in the context of optics and laser technology.


2. How does a BBO crystal work ?

BBO (Beta Barium Borate) crystals are nonlinear optical crystals used primarily for frequency conversion, such as second harmonic generation (SHG). They work by exploiting nonlinear optical properties, allowing a high-intensity laser beam to interact with the crystal to produce light at different frequencies. When the wavevectors of the incident and generated waves are properly aligned within the BBO crystal (that is, phase matched), momentum and energy conservation are satisfied, enabling efficient nonlinear frequency conversion.


3. What is the applications of chinese BBO crystals ?

  • Lasers: BBO crystals can be used to change the frequency of laser light, allowing for the production of different colors. This is critical in applications like laser spectroscopy, medical laser devices, and laser displays.

  • Optical Parametric Oscillators (OPOs): BBO crystals are frequently used in OPOs, which generate a pair of waves with frequencies that are different from the pump frequency. OPOs are used in a variety of scientific and technological applications.

  • Quantum Communication and Computing: BBO crystals can be used to produce entangled photon pairs, a key component in quantum information technologies.

  • Telecommunications: In fiber-optic communications, BBO crystals can be used for wavelength conversion, allowing signals to be sent more efficiently over long distances.

  • Research and Development: BBO crystals are used in many scientific experiments, particularly those involving lasers and photonics, such as high-resolution microscopy, time-resolved spectroscopy, and ultrafast phenomena studies.


4. What are the types of BBO crystal directional cutting ?

The cutting type of a BBO crystal determines its phase-matching properties. Phase-matching refers to the alignment of the refractive index for different wavelengths, ensuring efficient light conversion. There are two primary cutting types – Type I and Type II.

  • Type I (e → o + o) Phase Matching: In Type I phase matching, both input waves (often referred to as the "pump" waves) have the same polarization. That is, they are either both ordinary waves (o-wave) or both extraordinary waves (e-wave). The generated wave can have the opposite type of polarization. This type of phase matching is typically used for second harmonic generation (SHG) and sum frequency generation (SFG).For instance, in second harmonic generation, two o-wave photons can combine to generate an e-wave photon with twice the frequency.

  • Type II (e → o + e) Phase Matching: In Type II phase matching, the input waves have different polarizations. One is an ordinary wave, and the other is an extraordinary wave. The polarization of the generated wave will then depend on the specifics of the interaction. This type of phase matching is commonly used for third harmonic generation (THG) and difference frequency generation (DFG).For example, in Third harmonic generation, an o-wave and an e-wave photon can combine to produce another e-wave or o-wave photon with twice the frequency.

CRYSMIT' s BBO Crystal orientation angle Theat and Phi (As Figure 1).  When the Phi=90deg , BBO crystals are for Type I application. When the Phi=0deg , BBO crystals are for Type II application. 

BBO Crystal orientation angle.webp Figure 1

The choice between Type I and Type II phase matching will depend on the specific requirements of the application, including the wavelengths and polarizations of the light sources being used, and the desired properties of the output light.


5. How to identify BBO crystal tuning (adjusting) axis ?

In order to obtain maximum conversion efficience, adjust the angle is nomally used to reach phase-matching direction. The conversion efficience is very sensitive to adjust around m-axis which is called tuning axis of BBO crystals and It is normal to marked surface(As the Figure 2).

Tuning axis of BBO crystals.webp Figure 2  


The marking the tuning axis of CRYSMIT' BBO crystal in the following two ways：

Marking of CRYSMIT' BBO crystal.webpFigure 3         Marking of CRYSMIT' Thin BBO crystal.webpFigure 4

If it is a BBO crystal without holder, we will mark the tuning axis with a black dot on the side as the Figure 3. 

If it is a BBO ctystals with holder, a white line across the middle of the holder indicates the tuning axis as Figure 4. 


6. How to align a bbo crystal ?

Once you have identified the BBO crystal tuning axis, the next step is Aligning a BBO (Beta Barium Borate) crystal for optimal nonlinear frequency conversion (e.g., Second Harmonic Generation) requires precise adjustments to ensure maximum conversion efficiency.

  • Secure the BBO crystal in an adjustable mount that allows for angular rotation (typically around both horizontal and vertical axes). and Ensure your laser source is stable.

  • Direct the fundamental beam (the beam you want to convert) through the center of the BBO crystal. It should be perpendicular to the entrance and exit faces.

  • Slowly rotate the BBO crystal around the beam direction. This is the main "tuning" action.

  • While rotating, monitor the converted beam's intensity. For SHG, this would be the second harmonic generation.

  • As you notice the appearance of the second harmonic or the desired converted wavelength, fine-tune the angle to maximize its intensity. The position at which the intensity is highest is your optimal phase matching condition.

  • Tilt the crystal slightly in the vertical plane to check if this enhances the output. This adjustment ensures that the tuning axis is truly optimized in all dimensions.

  • Once you've achieved the maximum output intensity, lock the crystal mount to maintain this position.


7. How to choose the suitable china BBO crystals ?

  • Wavelength Range and Phase-matching range: BBO crystals have a wide transmission range from 190nm to 3500nm and a wide phase matching range from 409.6nm to 3500nm.

  • Phase Matching: Consider the phase matching conditions required by your application. This depends on the wavelengths and polarizations of the input and output light. You'll have to choose between Type I and Type II phase matching, depending on the application.

  • Size (Aperture): In order to choose a suitable size, the spot size of the laser must be considered. Usually, the effective size of BBO crystal needs to be 1-2mm larger than the laser spot. If in a tunable wavelength laser, it is also necessary to calculate the increase in crystal size due to wavelength tuning.

  • Thickness: Conversion efficiency, cost, and Group Velocities Mismatch are three important factors that determine crystal thickness.

  • Coating and Damage Threshold: Coating and Damage Threshold: Depending on your application, you might need a BBO crystal with a specific type of optical coating. P-coating has the advantages of wide band range, High Damage Threshold and low cost, but high loss due to reflectio.  AR coating With Little loss due to reflection, but the film layer is thicker, the damage threshold is lower, and the firmness is slightly worse.

  • Cost: BBO crystals can vary in price depending on their size, quality, and any coatings they may have.


8. How to clean and Sotre BBO crystals ？

  • Preparation: Before you begin, make sure to wear gloves to prevent oils from your skin from contaminating the crystal surface. Prepare a clean, dust-free environment to work in.

  • Blow Off Dust: Use a can of compressed air or a clean, oil-free air gun to gently blow off any loose dust or debris from the crystal surface.

  • Solvent Cleaning: Dampen a lint-free cleaning cloth，absorbent cotton or lens tissue with a high-grade optical cleaning solvent. A common cleaning solution is a 50/50 mixture of ethanol and ether.

  • Cleaning Motion: Gently wipe the crystal surface with absorbent cotton. Use light pressure and clean in a circular motion, moving outward from the center. Avoid wiping back and forth, as this could grind any particles present into the surface.

  • Rinsing: For more thorough cleaning, the crystal can be rinsed with deionized or distilled water. Be aware that BBO crystals are hygroscopic and should not be soaked in water or left wet for extended periods.

  • Drying: Dry the crystal gently using dry, lint-free lens tissue, or let it air dry in a clean environment. You can also use compressed air to remove the excess water.

  • Inspection: After cleaning, inspect the crystal surface under a bright light to ensure all contaminants have been removed. 

  • Storage : vacuum pack BBO crystals and Store BBO crystals in a clean, dry environment. And ensure the temperature and humidity stability of the environment.


9. Literature

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