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Proceedings Paper • Open Access

Experimental results of high power double-pass, double clad EYDFA
Author(s): T. Araki; E. Mizuta; Y. Kobayashi; Y. Takushima; X. Wang; S. Sekiguchi

Paper Abstract

A high-power, double-pass (DP), and double-clad (DC) Erbium (Er)-Ytterbium (Yb) doped optical fiber amplifier (EYDFA) was fabricated and experimentally evaluated. Because optical amplifiers for space missions must achieve higher electrical-to-optical conversion efficiency in consideration of power consumption and heat generation, we focused on a DP optical fiber amplifier that can be expected to achieve high optical-to-optical conversion efficiency. Free-space optics and integrated design were adopted for a DP module and a Faraday mirror (FM) module, so as to ensure low transmission loss (high efficiency). The DP module including a tap mirror, isolators, and a polarizing beam splitter measured 70×50×22.5 mm in size, with transmission loss of 0.65 dB (from input port to pump combiner port) and 0.52 dB (from pump combiner port to output port). In contrast, the FM module was 40×37×18.5 mm in size, with round-trip transmission loss of 0.66 dB. The fabricated DP-DC-EYDFA achieved output power of around 7 W in the wavelength range from 1540 to 1560 nm and optical-to-optical conversion efficiency exceeding 32%. To the authors’ knowledge, this is the highest output power ever recorded by a DP-DC-EYDFA. The measured polarization extinction ratio (PER) of the fabricated DP-DC-EYDFA was 23.6 dB without using PM EYDF. And in comparison with a single-pass DC EYDFA using the same EYDF, we obtained results showing that the conversion efficiency of the DP-EYDFA was at least 4.2% higher than that of the SP-EYDFA.

Paper Details

Date Published: 12 July 2019
PDF: 11 pages
Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 1118033 (12 July 2019); doi: 10.1117/12.2536030
Show Author Affiliations
T. Araki, JAXA (Japan)
E. Mizuta, JAXA (Japan)
Y. Kobayashi, JAXA (Japan)
Y. Takushima, Optoquest Co., Ltd. (Japan)
X. Wang, Optoquest Co., Ltd. (Japan)
S. Sekiguchi, Optoquest Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 11180:
International Conference on Space Optics — ICSO 2018
Zoran Sodnik; Nikos Karafolas; Bruno Cugny, Editor(s)

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