Erbium doped fibers for radiation tolerant, high power space laser communications

E. Joseph Friebele; Colin C. Baker; Jasbinder S. Sanghera; Michael J. LuValle; Stephanos Logothetis

doi:10.1117/12.2551493

2 March 2020 Erbium doped fibers for radiation tolerant, high power space laser communications

E. Joseph Friebele, Colin C. Baker, Jasbinder S. Sanghera, Michael J. LuValle, Stephanos Logothetis

Author Affiliations +

Proceedings Volume 11272, Free-Space Laser Communications XXXII; 1127212 (2020) https://doi.org/10.1117/12.2551493
Event: SPIE LASE, 2020, San Francisco, California, United States

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 n^th-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.

Conference Presentation

Citation Download Citation

E. Joseph Friebele, Colin C. Baker, Jasbinder S. Sanghera, Michael J. LuValle, and Stephanos Logothetis "Erbium doped fibers for radiation tolerant, high power space laser communications", Proc. SPIE 11272, Free-Space Laser Communications XXXII, 1127212 (2 March 2020); https://doi.org/10.1117/12.2551493

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