| Dopant Concentration Tolerance | +/-0.1% |
| Parallelism | <10 arcsec |
| Perpendicularity | < 5 arcmin |
| Clear Aperture | 95% |
| Surface Quality | 10 - 5 scratch & dig |
| Surface Flatness | λ/10 @ 633nm |
| Wavefront distorton | < 7mm diameter: λ/10 @ 633nm; >/=7mm diameter: λ/8 @ 633nm |
| Damage Threshold | over 15J/cm2 TEM00, 10ns, 10Hz |
Pure YLF crystals are transparent within the spectrum band of 0.12 - 7.5 µm, photo-, thermo- and adiation-resistant. The YLF crystals has low non-linear refraction index value and thermo optical constants, which makes theses crystals applicable in research, development, education, production, photonics, optic, laser technology and telecommunications.