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 has the following. 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:0.15x45° Coating: * Protective coating is required to prevent polished surfaces from fogging. * Anti-reflective coating should be considered if low reflectivity is required. Email: [email protected] Tel:+86-755-2372 7820 Fax：+86-755-2302 3823 www.hobbite.net Address:2F, Guohuitong Business Center, BaoAn District, ShenZhen City, GuangDong Province, PRC. Zip Co