100-watt fiber-based green laser with near diffraction-limited beam quality

Dan Hu; Eric Eisenberg; Khush Brar; Tolga Yilmaz; Eric Honea

doi:10.1117/12.843623

17 February 2010 100-watt fiber-based green laser with near diffraction-limited beam quality

Dan Hu, Eric Eisenberg, Khush Brar, Tolga Yilmaz, Eric Honea

Proceedings Volume 7580, Fiber Lasers VII: Technology, Systems, and Applications; 758004 (2010) https://doi.org/10.1117/12.843623
Event: SPIE LASE, 2010, San Francisco, California, United States

Abstract

An air-cooled, light-weight, fiber-based, high power green laser has been prototyped. The system consists of an all-fibercoupled IR pump laser at 1064 nm and a frequency-conversion module in a compact and flexible configuration. The IR laser operates in QCW mode, with 10 MHz pulse repetition frequency and 3-5 ns pulse width, to generate sufficient peak power for frequency doubling in the converter module. The IR laser can produce more than 200 W in a linearlypolarized diffraction-limited output beam with high spectral brightness for frequency conversion. The converter module has an input telescope and an oven with a nonlinear crystal to efficiently convert the 1064-nm IR fiber laser output to 532-nm green output. The IR laser and conversion module are connected via a stainless-steel protected delivery fiber for optical beam delivery and an electrical cable harness for electrical power delivery and system control. The beam quality of the 532 nm output remains near diffraction-limited, with M²<1.4. Up to 101 W of 532 nm output was demonstrated and multi-hour runs were characterized at 75 W output. The weights of the IR laser package and doubler are 69 lbs and 14 lbs respectively. An overview of the system and full characterization results will be presented. Such compact, highbrightness green laser sources are expected to enable various scientific, defense and industrial applications.

Citation Download Citation

Dan Hu, Eric Eisenberg, Khush Brar, Tolga Yilmaz, and Eric Honea "100-watt fiber-based green laser with near diffraction-limited beam quality", Proc. SPIE 7580, Fiber Lasers VII: Technology, Systems, and Applications, 758004 (17 February 2010); https://doi.org/10.1117/12.843623

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