Improvement of Gain Medium Thermal Effect in Nd∶YAG Grazing Incidence Slab Laser

LinTao, 季林涛 Ji; Yan, 邹 岩 Zou; Zhitong, 李之通 Li; Menghua, 姜梦华 Jiang; Hong, 雷訇 Lei; Qiang, 李强 Li

doi:10.3788/cjl201744.1101005

Cited by 2 publications

(1 citation statement)

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“…Therefore, we have made a specific analysis of the thermal effect of Nd:YAG slab. The thermal effect of this crystal have also been investigated by scholars at home and abroad [5,6,7] . In the literature, the researchers have demonstrated the thermal conduction model of an Nd:YAG slab crystal under LD pumping, simulated the internal temperature field distribution of the crystal and obtained and experimentally verified the thermal len focal length of the laser crystal.…”

Section: Introductionmentioning

confidence: 99%

Thermal effect of LD end-pumped Nd:YAG laser at 1319nm

Meng,

Zang,

Jiang

et al. 2023

Eighteenth National Conference on Laser Technology and Optoelectronics

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The 1.3 μm laser source has a wide range of applications in the fields of sodium beacons, optical communication, image display and laser medicine. In the paper, we demonstrate a laser with an LD end-pumped Nd:YAG slab crystal hybrid cavity Innoslab structure. When the pump power is high, the thermal effect of the laser during oscillation has an impact on the stability of the resonant cavity and the quality of the beam. We demonstrate a finite element model of an Nd:YAG crystal by means of heat conduction theory and analyse the effect of the temperature distribution at the crystal end face and the pump spot width on the thermal effect of the crystal. Calculations show that the finer the pump spot, the more pronounced the thermal effect of the crystal. In the experiment, the Nd:YAG slab crystal was doped at a concentration of 1at%, and a mixing cavity is constructed with a concave spherical mirror of R1 = 1000 mm and a convex cylindrical mirror of R2 = 900 mm; the length of the cavity is 55 mm; a negative cylindrical lens of Rc = -100 mm is inserted in the cavity as a compensating mirror. Finally, the maximum output power in the resonant cavity without the compensating mirror was 46.9 W; with the addition of the compensating mirror the maximum output power was 40.5 W; the vertical beam quality was increased from 2.98 to 1.28.

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Section: Introductionmentioning

confidence: 99%