DPSS laser beam quality optimization through pump current tuning

Rob Omohundro; Alice Callen; Sydney Sukuta

doi:10.1117/12.905789

15 February 2012 DPSS laser beam quality optimization through pump current tuning

Rob Omohundro, Alice Callen, Sydney Sukuta

Proceedings Volume 8235, Solid State Lasers XXI: Technology and Devices; 823524 (2012) https://doi.org/10.1117/12.905789
Event: SPIE LASE, 2012, San Francisco, California, United States

Abstract

The goal of this study is to demonstrate how a DPSS laser beam's quality parameters can be simultaneously optimized through pump current tuning. Two DPSS lasers of the same make and model were used where the laser diode pump current was first varied to ascertain the lowest RMS noise region. The lowest noise was found to be 0.13% in this region and the best M² value of 1.0 and highest laser output power were simultaneously attained at the same current point. The laser manufacturer reported a M² value of 1.3 and RMS noise value of .14% for these lasers. This study therefore demonstrates that pump current tuning a DPSS laser can simultaneously optimize RMS Noise, Power and M² values. Future studies will strive to broaden the scope of the beam quality parameters impacted by current tuning.

Citation Download Citation

Rob Omohundro, Alice Callen, and Sydney Sukuta "DPSS laser beam quality optimization through pump current tuning", Proc. SPIE 8235, Solid State Lasers XXI: Technology and Devices, 823524 (15 February 2012); https://doi.org/10.1117/12.905789

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