YCOB Yttrium calcium oxyborate
YCOB Yttrium calcium oxyborate crystal is a nonlinear crystal, its nonlinear optical coefficient is comparable to BBO and LBO crystals, with stable physical and chemical performance (no tidal solution) and good mechanical processing performance, and can be obtained in a short period, has become one of the most widely studied nonlinear optical crystals. YCOB crystal is easy to grow, high optical quality, light transmittance band width, large phase matching range, high damage threshold, and no tidal solution, and has become a research hotspot in frequency conversion devices. Due to Y can be replaced with most rare earth activated ions in any ratio, the crystal possesses both laser and nonlinear optical properties, thus becoming a laser self doubling crystal. The biggest advantage of YCOB crystal is its excellent nonlinear optical absorption and the ability to fabricate large aperture devices.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Crystal structure | Monooblique, point group m |
| Crystal lattice parameters | a=8.0770 Å, b=16.0194 Å , c=3.5308 Å , β=101.167º, Z=2 |
| Melting point | About 1510 C |
| Moh's hardness | 6~6.5 |
| Density | 3.31 g/cm3 |
| Thermal conductivity | 2.6 W/m/K (||X), 2.33 W/m/K (||Y), 3.1 W/m/K (||Z) |
| Dimensional tolerance | (W±0.1mm)x(H±0.1mm)x(L+0.5mm/-0.1mm)（L≥2.5mm）(W±0.1mm)x(H±0.1mm)x(L+0.1mm/-0.1mm)（L＜2.5mm） |
| Optical aperture | ≧90% |
| Wavefront distortion [@633nm] | ≦λ/8 @633nm |
| Flatness [@633nm] | λ/8 @633nm |
| Finish | 10/5 |
| Parallelism | ≦20" |
| Verticality | ≦5 ′ |
| Angular deviation | △θ≦0.25°,△φ≦0.25° |
| Coating film | custom made |
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