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Proceedings Paper • Open Access

Radiation hardness assessment of widely tunable and DFB lasers
Author(s): Michael Todd; Tom Farrell

Paper Abstract

Proton irradiation was carried out on emerging semiconductor laser technologies, including Distributed Bragg Reflector (DBR) and Sampled Grating (SG)- DBR lasers at 1550 nm, as well as Distributed Feedback (DFB) lasers at 935 nm and 1550 nm. Two separate exposure sessions, at low and high doses, were performed, the first to mimic a typical 2-year Earth Observation mission, and the second for more comprehensive radiation hardness assessment. Low dose exposure yielded minimal damage to all lasers, but the 935 nm DFBs did exhibit small changes in tuning efficiency. In-situ measurements on the 1550 nm DFB and DBR lasers show degradation in lasing threshold by 15% and 4% respectively, and the DBR mode structure is maintained but shifts by more than one mode width.

Paper Details

Date Published: 28 August 2019
PDF: 7 pages
Proc. SPIE 10567, International Conference on Space Optics — ICSO 2006, 105674B (28 August 2019); doi: 10.1117/12.2551771
Show Author Affiliations
Michael Todd, Intune Networks Ltd. (Ireland)
Tom Farrell, Intune Networks Ltd. (Ireland)

Published in SPIE Proceedings Vol. 10567:
International Conference on Space Optics — ICSO 2006
Errico Armandillo; Josiane Costeraste; Nikos Karafolas, Editor(s)

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