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Proceedings Paper

High temperature semiconductor diode laser pumps for high energy laser applications
Author(s): Jenna Campbell; Tadej Semenic; Keith Guinn; Paul O. Leisher; Avijit Bhunia; Milan Mashanovitch; Daniel Renner
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Paper Abstract

Existing thermal management technologies for diode laser pumps place a significant load on the size, weight and power consumption of High Power Solid State and Fiber Laser systems, thus making current laser systems very large, heavy, and inefficient in many important practical applications. To mitigate this thermal management burden, it is desirable for diode pumps to operate efficiently at high heat sink temperatures. In this work, we have developed a scalable cooling architecture, based on jet-impingement technology with industrial coolant, for efficient cooling of diode laser bars. We have demonstrated 60% electrical-to-optical efficiency from a 9xx nm two-bar laser stack operating with propylene-glycolwater coolant, at 50 °C coolant temperature. To our knowledge, this is the highest efficiency achieved from a diode stack using 50 °C industrial fluid coolant. The output power is greater than 100 W per bar. Stacks with additional laser bars are currently in development, as this cooler architecture is scalable to a 1 kW system. This work will enable compact and robust fiber-coupled diode pump modules for high energy laser applications.

Paper Details

Date Published: 20 February 2018
PDF: 5 pages
Proc. SPIE 10513, Components and Packaging for Laser Systems IV, 105130O (20 February 2018); doi: 10.1117/12.2288600
Show Author Affiliations
Jenna Campbell, Freedom Photonics, LLC (United States)
Tadej Semenic, Teledyne Scientific Co. (United States)
Keith Guinn, Freedom Photonics, LLC (United States)
Paul O. Leisher, Freedom Photonics, LLC (United States)
Avijit Bhunia, Teledyne Scientific Co. (United States)
Milan Mashanovitch, Freedom Photonics, LLC (United States)
Daniel Renner, Freedom Photonics, LLC (United States)

Published in SPIE Proceedings Vol. 10513:
Components and Packaging for Laser Systems IV
Alexei L. Glebov; Paul O. Leisher, Editor(s)

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