High beam quality and high energy Ho:YLF laser

Jianyong Xue Sr.; Lei Wang Sr.; Yuan Gao; Ziyue Zhang; Yefei Mao; Hongzhi Yang

doi:10.1117/12.2620751

27 March 2022 High beam quality and high energy Ho:YLF laser

Jianyong Xue Sr., Lei Wang Sr., Yuan Gao, Ziyue Zhang, Yefei Mao, Hongzhi Yang

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121690V (2022) https://doi.org/10.1117/12.2620751
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

The capability of monitoring the greenhouse distribution and variation is of the essence for mankind sustainable development. Differential absorption lidar (DIAL) based on high energy 2 μm pulse lasers are favorable for the atmospheric CO₂ concentration remote sensing. Here we present a high energy Q-switched Ho:YLF laser with a ring cavity resonantly pumped by two self-made 1940 nm Tm:YAP solid-state lasers through polarization beam combining. In the operation of continuous-wave (CW), the maximum output power was 7.39 W at 2065.15 nm as the incident pump power was 33 W, corresponding to a slope efficiency and an optical-to-optical conversion efficiency were 40.75 % and 22.39 %. At 300 Hz, a maximum pulse energy of 21.23 mJ was obtained with the pulse width of 90 ns under 30.8 W pump power. The energy instability during 30 minutes was 1.01 % at the maximum pulse output energy. The beam quality factor M2 were 1.009 in x direction and 1.020 in y direction, respectively. The high energy high stability Ho:YLF laser also makes excellent potential sources for the following amplifiers as well as other applications such as surgery. With the continuing double pulse injection locking, a single frequency high energy pulse laser will be achieved for the CO₂ sensing DIAL.

Citation Download Citation

Jianyong Xue Sr., Lei Wang Sr., Yuan Gao, Ziyue Zhang, Yefei Mao, and Hongzhi Yang "High beam quality and high energy Ho:YLF laser", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121690V (27 March 2022); https://doi.org/10.1117/12.2620751

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KEYWORDS

Crystals

Pulsed laser operation

Continuous wave operation

Q switched lasers

Laser energy

Resonators

Laser crystals

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