Ms. Huaimiao Sun Profile

Huaimiao Sun

at Beijing Univ of Technology

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Proceedings Article | 31 August 2021 Paper

1kHz, Er3+/Yb3+: glass passively Q-switched microchip laser with long time stable operation

Huaimiao Sun, Zejun Li, Zhanda Zhu, Yonglin Hui, Hong Lei, Qiang Li

Proceedings Volume 11907, 1190717 (2021) https://doi.org/10.1117/12.2602899

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LD pumped erbium glass passively Q-switched 1.5μm microchip laser is a research hotspot in laser ranging and imaging application. The high repetition rate microchip laser has serious thermal effect problem, so it is difficult to work stably for a long time. This paper reports a passively Q-switched 1535nm laser with erbium-ytterbium co-doped phosphate glass using double-ended adhesive-free bonding technology. The laser combines YAG crystal, Er³⁺/Yb³⁺: glass and Co²⁺[/sup : MgAl₂O₄ by bonding to improve the thermal effect of the laser. At the same time, by optimizing the size of the pump light spot, the initial transmittance T₀ of the saturable absorber and the reflectivity R of the output mirror, the utilization efficiency of the pump light is improved and the influence of thermal effect is further reduced. The results show that the laser output with the repetition rate of 1kHz, the single pulse energy of 40μJ, pulse width of 8ns, peak power of 5kW, beam quality of 1.4, can output stably for a long time.

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