Improving third harmonic generation performance by elevating the operation temperature of KDP and DKDP crystals.

Potassium dihydrogen phosphate (KHPO, KDP) family crystals are the only nonlinear optical materials that can satisfy the aperture requirement of the inertial confinement fusion (ICF) laser driver. As a major ultraviolet (UV) generation scheme in service, the type-II phase-matched (PM) third harmonic generation (THG) performance of KDP and DKDP crystals is critical to ICF equipment. All the time, the largest efforts from all aspects have been made to achieve the highest output energy, conversion efficiency, and anti-damage ability.

> 6 W 320 nm ultraviolet pulse laser based on intracavity frequency doubling of Pr:YLF crystal.

By optimizing a laser crystal and resonator structure, we obtained a series of the best experimental results of Pr-doped solid-state lasers, including a 10.8 W continuous-wave (CW) laser, a 5.29 W acousto-optical (AO) Q-switched laser, and a 6.

Generation of a red-green-blue laser by stimulated Raman scattering of ethanol.

In this paper, we report an efficient red-green-blue (RGB) laser based on the stimulated Raman scattering (SRS) of ethanol. The wavelengths of the three-color laser are 631, 532, and 447 nm, respectively, and the gamut space that can cover is 116% of the Rec. 2020 standard gamut in the CIE1976 color space.

Improving fourth harmonic generation performance by elevating the operation temperature of ADP crystal.

In current inertial confinement fusion (ICF) facilities, potassium dihydrogen phosphate (KHPO, KDP) type crystals are the only nonlinear optical (NLO) materials that can satisfy the aperture requirement of the ICF laser driver. Ammonium dihydrogen phosphate (NHHPO, ADP) crystal is a typical isomer of KDP crystal, with a large nonlinear optical coefficient, high ultraviolet transmittance, and large growth sizes, which is an important deep ultraviolet (UV) NLO material. In this paper, we investigated the effect of ADP temperature on its fourth-harmonic-generation (FHG) performance.

Spontaneous Raman spectra analysis and efficient nanosecond pulse Raman laser of a BaTeWO crystal.

In this Letter, the spontaneous Raman spectra of a novel, to the best of our knowledge, crystal α-BaTeWO (α-BTW) are characterized and analyzed. The relative Raman gain coefficient of the α-BTW crystal is calculated to be 0.84 times that of YVO.

Growth, Optical, and Spectroscopic Properties of Pure and Nd-Doped GdSr(PO) Crystals with Disordered Structure.

Disordered crystals have attracted immense attention for the generation of ultrashort laser pulses due to their good thermomechanical characteristics and wide emission bandwidths. In this work, a Gd-based orthophosphate crystal, GdSr(PO), (GSP), and a Nd-doped GdSr(PO) crystal, (Nd:GSP), were obtained by the Czochralski method. The crystal structure, optical properties, electronic band structure, laser damage threshold, and hardness of the GSP crystal were comprehensively investigated.