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Beta-Barium Borate Crystal

Advantages of Beta-BBO Crystal

• Broad phase matching (SHG) range from 409.6nm to 3500nm

• Wide transmission region from 190nm to 3500nm

• Large effective SHG coefficient

• High damage threshold of 10 GW/cm2 for 100 ps pulse-widths at 1064nm

• High optical homogeneity with Dn 10^-6/cm²

• Wide temperature bandwidth of about 55° (for type I SHG 1064nm)

• Good mechanical and physical properties

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Product Details

Beta-BBO crystal is an important nonlinear optical crystal with combination of unique optical properties, such as broad transmission and phase matching ranges, large nonlinear coefficient, high damage threshold and excellent optical homogeneity. The β-BBO crystal is an efficient material for the second, third and fourth harmonic generation of Nd:YAG lasers, and the best NLO material for the fifth harmonic generation at 213 nm. Conversion efficiencies of more than 70% for SHG, 60% for THG and 50% for 4HG, and 200 mW output at 213 nm (5HG) have been obtained, respectively.

Beta-BBO's main applications

• Second, third, fourth and fifth harmonic generation of Nd lasers

• Frequency-doubling, -tripling and -mixing of Dye lasers

• Second, third and fourth harmonic generation of Ti:Al O and Alexandrite lasers

• Optical parametric amplifiers (OPA) and optical parametric oscillators (OPO)

• Frequency-doubling of Argon ion, Cu-vapor and Ruby lasers

Dimension Tolerance	± 0.1 mm
Angle Tolerance	< ± 0.25°
Flatness	< λ/8 @ 632.8 nm
Surface Quality	< 10/5 [S/D]
Parallelism	< 20”
Perpendicularity	≤ 5'
Chamfer	≤ 0.2 mm @ 45°
Transmitted Wavefront Distortion	< λ/8 @ 632.8 nm
Clear Aperture	> 90% central area
Coating	AR @ 1064nm（R<0.2%）; PR
Laser Damage Threshold	> 1 GW/cm² for 1064nm, 10ns, 10Hz (polished only) > 0.5 GW/cm² for 1064nm, 10ns, 10Hz (AR-coated) > 0.3 GW/cm² for 532nm, 10ns, 10Hz (AR-coated)
* Products with special requirement upon request.