Measuring the sensitivity to optical feedback of single-frequency high-power laser diodes
M. Christensen1,2, C. Zink3, M.T. Jamal4, A.K. Hansen1, O.B. Jensen1, and B. Sumpf3
Published in:
J. Opt. Soc. Am. B, vol. 38, no. 3, pp. 885-892 (2021).
Abstract:
Laser diodes, in general, are sensitive to optical feedback, especially with regard to maintaining single-frequency operation. Until now, however, the feedback sensitivity of high-power devices such as single-frequency distributed Bragg reflector (DBR) tapered laser diodes has not been investigated in quantitative detail. In this paper,we analyze the impact of very weak optical feedback between -105 dB and -40 dB on a high-power DBR tapered laser diode. The measurement setup is validated using a typical DFB laser diode. The results are in good agreement with the theory at low-feedback levels.
1 Technical University of Denmark, Diode Lasers and LED Systems, Frederiksborgvej 399, 4000 Roskilde, Denmark
2 Currently at: Norlase ApS, Brydehusvej 13, 2750 Ballerup, Denmark
3 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, 12489 Berlin, Germany
4 DTU Health Tech, Technical University of Denmark, Frederiksborgvej 399, 4000 Roskilde, Denmark
Copyright © 2021 Optical Society of America. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the OSA.
Full version in pdf-format.