Affiliation:
1. Guangdong Provincial Engineering Research Center of Crystal and Laser Technology
2. Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications
Abstract
High beam quality 588 nm radiation was realized based on a frequency-doubled crystalline Raman laser. The bonding crystal of YVO4/Nd:YVO4/YVO4 was used as the laser gain medium, which can accelerate the thermal diffusion. The intracavity Raman conversion and the second harmonic generation were realized by a YVO4 crystal and an LBO crystal, respectively. Under an incident pump power of 49.2 W and a pulse repetition frequency of 50 kHz, the 588 nm power of 2.85 W was obtained with a pulse duration of 3 ns, corresponding to a diode-to-yellow laser conversion efficiency of 5.75% and a slope efficiency of 7.6%. Meanwhile, a single pulse's pulse energy and peak power were 57 µJ and 19 kW, respectively. The severe thermal effects of the self-Raman structure were overcome in the V-shaped cavity, which has excellent mode matching, and combined with the self-cleaning effect of `Raman scattering, the beam quality factor M2 was effectively improved, which was measured optimally to be Mx2 = 1.207, and My2 = 1.200, with the incident pump power being 49.2 W.
Funder
Guangzhou Science and Technology Project
Research and Development Program in Key Areas of Guangdong Province
National Natural Science Foundation of China
Subject
Atomic and Molecular Physics, and Optics
Cited by
5 articles.
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