Dual-wavelength, continuous-wave Yb:YAG laser for high-resolution photothermal common-path interferometry

Abstract

We present a continuous-wave (CW) intracavity frequency-doubled Yb:YAG laser providing 1030 and 515 nm output simultaneously. This laser system was designed for photothermal common-path interferometry to measure spatially resolved profiles of the linear absorption in dielectric media and coatings for visible or infrared light as well as of the nonlinear absorption for the combination of both. A Z-shape laser cavity was designed, providing a beam waist in which an LBO crystal was located for effective second-harmonic generation (SHG). Suitable frequency conversion parameters and cavity configurations were discussed to achieve the optimal performance of a diode-pumped CW SHG laser. A 12.4 W 1030 nm laser and 5.4 W 515 nm laser were developed simultaneously in our experiment.

Radiation tests on erbium-doped garnet crystals for spaceborne CH4-Lidar applications

“…After the radiation test campaign the bulk absorption of the test samples is measured spatially resolved along the propagation direction of the protons with a photo-thermal common-path interferometer (PCI) at a test wavelength of 1030 nm [17][18] [19]. The measurement results show strong absorption features at the front and rear surfaces of all the test samples.…”

Thermal properties of borate crystals for high power optical parametric chirped-pulse amplification

“…The absorption coefficients of BBO vary substantially between manufacturers ( Table 3 and Table 4). This depends to a large extent on the crystal growth process, the crystal purity and on the specific position of the crystal bulk in the boule, as for example reported for BiBO in [33].…”

Q-Switched Yb:YAG/YVO4 Raman Laser

“…Due to the excellent optical, thermal and mechanical properties [8], Yb doped yttrium aluminum garnet (Yb:YAG) crystals become one of the dominate laser active media. Another interest in Yb:YAG lasers is that the second harmonic generation (SHG) of 1030 nm matches the emission line of Ar-ion lasers [9].…”