| Thickness Tolerance | +/-0.05mm | Orientation Tolerance | <0.5 degree |
| Flatness | less than λ/8 @ 633nm | Transmitting Wavefront Distortion | less than λ/4 @ 633nm |
| Chamfer | ≤0.2mmx45° | Chip | Chip |
| Surface Quality | better than 10/5 S/D (MIL-PRF-13830B) | Parallelism | ≤30 arc seconds |
| Perpendicularity | ≤5 arc minutes | Clear Aperture | >90% |
Yttrium Calcium Oxoborate (YCa4O(BO3)3,YCOB) Crystal is an excellent media for nonlinear optical and high-temperature piezoelectric usages. YCOB crystals, being non-deliquescent and thus of chemical stabilities, also feature an effective nonlinear coefficient that could even be larger than that of LBO, higher-temperature endurance. Besides, the thermal expansion is much less significant in YCOB crystals than in LBO crystals, this trait, combined with exceptional homogeneities within YCOB, implies more ease in the processing of the YCOB. The crystals are accessible in large dimensions, hence could be utilized to manufacture large aperture laser components and achieve various parametric nonlinear processing (e.g. Second Harmonic Generation, Third Harmonic Generation, OPO/OPA, Optical Parametric Chirped-Pulse Amplification (OPCPA)) for high power lasers.
Hangzhou Shalom EO offers YCOB Crystals with a maximum diameter of 100mm. The YCOB crystals are Czochralski-grown, contributing to a faster growth rate and lower costs. Custom specifications of the YCOB crystals are available upon request.
