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Proceedings Paper

Erbium doped fibers for radiation tolerant, high power space laser communications
Author(s): E. Joseph Friebele; Colin C. Baker; Jasbinder S. Sanghera; Michael J. LuValle; Stephanos Logothetis
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Paper Abstract

We have studied the in-situ radiation-induced degradation and recovery of the output optical power of actively-pumped erbium-doped fiber amplifiers (EDFAs) pumped at both 980 and 1480 nm during and after radiation exposure. The EDFs have high Er concentrations corresponding to 20 – 60 dB/m peak Er3+ absorptionat 1.532 μm suitable for high power cladding-pumped applications. The fibers were made with a wide range of glass compositions, including the addition of specific dopants to reduce clustering and improve efficiency. Radiation tolerance of nanoparticle doped fibers is superior to those fabricated by solution doping. The effects of photo-annealing have been explicitly studied, and an nth-order kinetic model has been used to predict end-of-life degradation. More robust statistical kinetics modeling of accelerated lifetime data has been used to predict on-orbit performance in more realistic scenarios, such as Geosynchronous Earth Orbit.

Paper Details

Date Published: 2 March 2020
PDF: 10 pages
Proc. SPIE 11272, Free-Space Laser Communications XXXII, 1127212 (2 March 2020); doi: 10.1117/12.2551493
Show Author Affiliations
E. Joseph Friebele, Jacobs Corp. (United States)
Colin C. Baker, U.S. Naval Research Lab. (United States)
Jasbinder S. Sanghera, U.S. Naval Research Lab. (United States)
Michael J. LuValle, Rutgers Univ. (United States)
Stephanos Logothetis, Rutgers Univ. (United States)

Published in SPIE Proceedings Vol. 11272:
Free-Space Laser Communications XXXII
Hamid Hemmati; Don M. Boroson, Editor(s)

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