Components for the third harmonics of Nd:YAG and Nd:YVO4 Lasers
The third harmonic of Nd:YAG and Nd:YVO4 lasers has gained increasing importance in the field of materials processing as well as for measurement applications and as pump source for optical parametric oscillators. On these pages we introduce optics for 355nm: single and multiple wavelength mirrors, separators, thin film polarizers and anti reflection coatings. All designs are calculated according to customer specification.
(a): standard type
(b): separator which is especially optimized for low reflectance at 1064nm
For common specifications of separators for the harmonics in the UV spectral range please see table on higher-harmonics. Please do not hesitate to contact us for separators or mirrors with other angles of incidence.
(a) Fluoridic Separator HRs(45°, 355nm) > 95% + Rp(45°, 532nm) < 2% + Rs,p(45°, 1064nm) < 2%
(b) HR(45°, 532nm) > 99.8nm + R(45°, 355nm) < 5%
Fluoridic separators show an extended lifetime at high power densities. The transmission of the p-polarized light can be optimized by angle tuning. Tilting the polarizer by ± 2° shifts the minimum of Rp to longer or shorter wavelengths which can improve the polarization ratio significantly.