BBO crystal Brief description:

BBO crystal is an efficient NLO crystal for the second, third and fourth harmonic generation of Nd:YAG lasers, and the best NLO crystal 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.

Bbo Crystal

α-bbo crystal

a-BBO, high temperature phase of BaB2O4, is an excellent birefringent crystal

Bbo Crystal Specifications:

Angle tolerance:Δθ< ± 0.5°; Δφ< ±0.5°
Dimensional Tolerance:(W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm)
Flatness:<λ/8 at 633nm
Surface Quality:10/5 S/D
Parallelism:< 20 arc seconds
Perpendicularity:< 5 arc minutes
Wavefront Distortion:<λ/8 at 632.8nm
Clear Aperture:Central 95%
Chamfer:0.15×45°
Coating:* Protective coating is required to prevent polished surfaces from fogging.
* Anti-reflective coating should be considered if low reflectivity is required.

A-Star professionals are here to help you evaluate which nonlinear crystal would be best for the required frequency conversion or it’s optimal configuration in respect of available power, beam size, pulse duration or repetition rate.

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