Improving reliability of high power quasi-CW laser diode arrays for pumping solid state lasers

Farzin Amzajerdian; Byron L. Meadows; Nathaniel R. Baker; Bruce W Barnes; Renee S. Baggott; George E Lockard; Upendra N. Singh; Michael J. Kavaya

doi:10.1117/12.620102

10 September 2005 Improving reliability of high power quasi-CW laser diode arrays for pumping solid state lasers

Farzin Amzajerdian, Byron L. Meadows, Nathaniel R. Baker, Bruce W Barnes, Renee S. Baggott, George E Lockard, Upendra N. Singh, Michael J. Kavaya

Author Affiliations +

Proceedings Volume 5887, Lidar Remote Sensing for Environmental Monitoring VI; 58870E (2005) https://doi.org/10.1117/12.620102
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

Most Lidar applications rely on moderate to high power solid state lasers to generate the required transmitted pulses. However, the reliability of solid state lasers, which can operate autonomously over long periods, is constrained by their laser diode pump arrays. Thermal cycling of the active regions is considered the primary reason for rapid degradation of the quasi-CW high power laser diode arrays, and the excessive temperature rise is the leading suspect in premature failure. The thermal issues of laser diode arrays are even more drastic for 2-micron solid state lasers which require considerably longer pump pulses compared to the more commonly used pump arrays for 1-micron lasers. This paper describes several advanced packaging techniques being employed for more efficient heat removal from the active regions of the laser diode bars. Experimental results for several high power laser diode array devices will be reported and their performance when operated at long pulsewidths of about 1msec will be described.

Citation Download Citation

Farzin Amzajerdian, Byron L. Meadows, Nathaniel R. Baker, Bruce W Barnes, Renee S. Baggott, George E Lockard, Upendra N. Singh, and Michael J. Kavaya "Improving reliability of high power quasi-CW laser diode arrays for pumping solid state lasers", Proc. SPIE 5887, Lidar Remote Sensing for Environmental Monitoring VI, 58870E (10 September 2005); https://doi.org/10.1117/12.620102

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