Photonics Research, 2019, 7 (2): 02000162, Published Online: Feb. 19, 2019  

High power and energy generation in a Nd:YAG single-crystal fiber laser at 1834  nm

Author Affiliations
1 Department of Electronic Engineering, Xiamen University, Xiamen 361005, China
2 Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
3 School of Physics Science and Engineering, Institute for Advanced Study, Tongji University, Shanghai 200092, China
4 Department of Physics, Sofia University, 5 James Bourchier Blvd., 1164 Sofia, Bulgaria
5 e-mail: xdxu79@jsnu.edu.cn
Abstract
We report on a diode-end-pumped high-power and high-energy Nd:YAG single-crystal fiber laser at 1834 nm. Two 808 nm diodes injecting about 58 W pump power into the Nd:YAG fiber have generated 3.28 W continuous-wave and 1.66 W Cr:ZnSe-based passively Q-switched lasers. Slope efficiencies with respect to pump powers are 8.7% for the continuous-wave laser and 4.9% for the Q-switched laser. The extracted maximum pulse energy is about 266.9 μJ, and the corresponding maximum pulse peak power is 2.54 kW. These performances greatly surpass previous results regarding this specific laser emission because the laser gain medium in the form of fiber can significantly mitigate thermally induced power saturation thanks to its significantly reduced thermal lensing effect. Single-crystal fiber lasers show great potential for high average power, pulse energy, and peak power.

Yaqi Cai, Bin Xu, Yunshan Zhang, Qingyu Tian, Xiaodong Xu, Qingsong Song, Dongzhen Li, Jun Xu, Ivan Buchvarov. High power and energy generation in a Nd:YAG single-crystal fiber laser at 1834  nm[J]. Photonics Research, 2019, 7(2): 02000162.

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