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Proceedings Paper

High-average-power narrow-line-width sum frequency generation 589 nm laser
Author(s): Yanhua Lu; Guobin Fan; Huaijin Ren; Lei Zhang; Xiafei Xu; Wei Zhang; Min Wan
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Paper Abstract

An 81 W average-power all-solid-state sodium beacon laser at 589 nm with a repetition rate of 250 Hz is introduced, which is based on a novel sum frequency generation idea between two high-energy, different line widths, different beam quality infrared lasers (a 1064 nm laser and a 1319 nm laser). The 1064 nm laser, which features an external modulated CW single frequency seed source and two stages of amplifiers, can provide average-power of 150 W, beam quality M2 of ~1.8 with ultra-narrow line width (< 100 kHz). The 1319 nm laser can deliver average-power of 100 W, beam quality M2 of ~3.0 with a narrow line width of ~0.3 GHz. By sum frequency mixing in a LBO slab crystal (3 mm x 12 mm x 50 mm), pulse energy of 325 mJ is achieved at 589 nm with a conversion efficiency of 32.5 %. Tuning the center wavelength of 1064 nm laser by a PZT PID controller, the target beam’s central wavelength is accurately locked to 589.15910 nm with a line width of ~0.3 GHz, which is dominated mainly by the 1319 nm laser. The beam quality is measured to be M2 < 1.3. The pulse duration is measured to be 150 μs in full-width. To the best of our knowledge, this represents the highest average-power for all-solid-state sodium beacon laser ever reported.

Paper Details

Date Published: 27 October 2015
PDF: 7 pages
Proc. SPIE 9650, Technologies for Optical Countermeasures XII; and High-Power Lasers 2015: Technology and Systems, 965008 (27 October 2015); doi: 10.1117/12.2194900
Show Author Affiliations
Yanhua Lu, The Key Lab. of Science and Technology on High Energy Laser (China)
Institute of Applied Electronics (China)
China Academy of Engineering Physics (China)
Guobin Fan, The Key Lab. of Science and Technology on High Energy Laser (China)
China Academy of Engineering Physics (China)
Huaijin Ren, The Key Lab. of Science and Technology on High Energy Laser (China)
Institute of Applied Electronics (China)
Lei Zhang, The Key Lab. of Science and Technology on High Energy Laser (China)
Institute of Applied Electronics (China)
Xiafei Xu, The Key Lab. of Science and Technology on High Energy Laser (China)
Institute of Applied Electronics (China)
Wei Zhang, The Key Lab. of Science and Technology on High Energy Laser (China)
Institute of Applied Electronics (China)
Min Wan, The Key Lab. of Science and Technology on High Energy Laser (China)
Institute of Applied Electronics (China)


Published in SPIE Proceedings Vol. 9650:
Technologies for Optical Countermeasures XII; and High-Power Lasers 2015: Technology and Systems
David H. Titterton; Harro Ackermann; Willy L. Bohn; Robert J. Grasso; Mark A. Richardson, Editor(s)

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