Chinese Optics Letters, 2020, 18 (3): 031403, Published Online: Mar. 10, 2020  

Generation of nanosecond 2.65 μm pulses and pulse narrowing in fiber-bulk Ho3+:YAG laser pumped gain-switched Cr2+:CdSe laser Download: 656次

Author Affiliations
1 Key Laboratory of Photonic Control Technology (Tsinghua University), Ministry of Education, Beijing 100084, China
2 State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
3 School of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen 518055, China
4 National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China
Abstract
The generation of mid-infrared pulsed lasers was achieved in a Ho3+:YAG laser pumped gain-switched Cr2+:CdSe laser system with the shortest pulse duration of 4.15 ns. With a pump pulse duration of 50 ns and pump power of 2.7 W, the gain-switched Cr2+:CdSe laser achieved over 10 times pulse narrowing, obtaining the maximum peak power of 5.7 kW. The optical-to-optical conversion efficiency was 3.7%, which could be further improved with better crystal surface polishing quality. The laser central wavelength was measured to be 2.65 μm with a bandwidth (FWHM) of 50 nm. In addition, the parameter optimization for suppressing the pulse tail was discussed, while the long cavity and high output transmissivity contributed to obtaining the single-peak pulses.

Hengkang Zhang, Encai Ji, Bin Zhang, Yi Chen, Baoquan Yao, Qiang Liu. Generation of nanosecond 2.65 μm pulses and pulse narrowing in fiber-bulk Ho3+:YAG laser pumped gain-switched Cr2+:CdSe laser[J]. Chinese Optics Letters, 2020, 18(3): 031403.

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