70-Watt green laser with near diffraction-limited beam quality

Dan Hu; Eric Eisenberg; Pratheepan Madasamy; Roy Mead; Eric Honea

doi:10.1117/12.809294

23 February 2009 70-Watt green laser with near diffraction-limited beam quality

Dan Hu, Eric Eisenberg, Pratheepan Madasamy, Roy Mead, Eric Honea

Proceedings Volume 7197, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII; 719705 (2009) https://doi.org/10.1117/12.809294
Event: SPIE LASE: Lasers and Applications in Science and Engineering, 2009, San Jose, California, United States

Abstract

A 70-Watt green laser with M²<1.4 has been demonstrated. This green laser consists of an all-fiber-based IR pump laser at 1064 nm and a frequency-conversion module in a compact and flexible configuration. The IR laser produces up to 150 Watts in a polarized diffraction-limited output beam with high spectral brightness for frequency conversion. The IR laser is operating under QCW mode, e.g. 10 MHz with 3~5 ns pulse width or 700 MHz with 50 ps pulse width, to generate sufficient peak power for frequency doubling in the converter module. The IR laser and conversion module are connected via a 5-mm stainless-steel protected delivery fiber for optical beam delivery and an electrical cable harness for electrical power delivery and system control. Both the IR laser and converter module are run through embedded software that controls laser operations such as warm up and shut down. System overview and full characterization results will be presented. Such a high power green laser with near diffraction-limited output in a compact configuration will enable various scientific as well as industrial applications.

Citation Download Citation

Dan Hu, Eric Eisenberg, Pratheepan Madasamy, Roy Mead, and Eric Honea "70-Watt green laser with near diffraction-limited beam quality", Proc. SPIE 7197, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII, 719705 (23 February 2009); https://doi.org/10.1117/12.809294

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