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Proceedings Paper

Improvements to tapered semiconductor MOPA laser design and testing
Author(s): James A. Beil; Lisa Shimomoto; Rebecca B. Swertfeger; Stephen M. Misak; Jenna Campbell; Jeremy Thomas; Daniel Renner; Milan Mashanovitch; Paul O. Leisher; Richard W. Liptak
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Paper Abstract

This paper expands on previous work in the field of high power tapered semiconductor amplifiers and integrated master oscillator power amplifier (MOPA) devices. The devices are designed for watt-class power output and single-mode operation for free-space optical communication. This paper reports on improvements to the fabrication of these devices resulting in doubled electrical-to-optical efficiency, improved thermal properties, and improved spectral properties. A newly manufactured device yielded a peak power output of 375 mW continuous-wave (CW) at 3000 mA of current to the power amplifier and 300 mA of current to the master oscillator. This device had a peak power conversion efficiency of 11.6% at 15° C, compared to the previous device, which yielded a peak power conversion efficiency of only 5.0% at 15° C. The new device also exhibited excellent thermal and spectral properties, with minimal redshift up to 3 A CW on the power amplifier. The new device shows great improvement upon the excessive self-heating and resultant redshift of the previous device. Such spectral improvements are desirable for free-space optical communications, as variation in wavelength can degrade signal quality depending on the detectors being used and the medium of propagation.

Paper Details

Date Published: 19 February 2018
PDF: 7 pages
Proc. SPIE 10514, High-Power Diode Laser Technology XVI, 105140U (19 February 2018); doi: 10.1117/12.2289933
Show Author Affiliations
James A. Beil, Rose-Hulman Institute of Technology (United States)
Lisa Shimomoto, Rose-Hulman Institute of Technology (United States)
Rebecca B. Swertfeger, Rose-Hulman Institute of Technology (United States)
Stephen M. Misak, Rose-Hulman Institute of Technology (United States)
Jenna Campbell, Freedom Photonics, LLC (United States)
Jeremy Thomas, Freedom Photonics, LLC (United States)
Daniel Renner, Freedom Photonics, LLC (United States)
Milan Mashanovitch, Freedom Photonics, LLC (United States)
Paul O. Leisher, Freedom Photonics, LLC (United States)
Richard W. Liptak, Rose-Hulman Institute of Technology (United States)

Published in SPIE Proceedings Vol. 10514:
High-Power Diode Laser Technology XVI
Mark S. Zediker, Editor(s)

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