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Open AccessArticle

40 W All-Fiber Er/Yb MOPA System Using Self-Fabricated High-Power Passive Fiber Components

1
Laser and Fiber Electronics Group, Faculty of Electronics, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-70 Wroclaw, Poland
2
Laser Sensing Laboratory, Wroclaw Research Centre EIT+, Stabłowicka 147, 54-066 Wrocław, Poland
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(6), 869; https://doi.org/10.3390/app8060869
Received: 19 April 2018 / Revised: 18 May 2018 / Accepted: 18 May 2018 / Published: 25 May 2018
(This article belongs to the Special Issue Rare-Earth Doping for Optical Applications)
In this work, we demonstrate a three-stage all-fiber master oscillator power amplifier (MOPA) system emitting over 40 W of continuous-wave (CW) output power at ~1.5 µm. The setup utilizes three self-fabricated high-power passive fiber components: a mode-field adaptor (MFA) and two types of pump and signal power combiners. Their development allowed us to become independent from commercially available components, which are often incompatible with fibers used in the experimental setups, resulting in additional losses. A power combiner with single-mode (SM) signal fibers in a configuration (5 + 1) × 1 was used in the second stage of the MOPA system, which was based on an SM Er–Yb co-doped double-clad (DC) fiber. The fabricated MFA was used to connect the second amplifier stage based on SM fibers with the third amplifier stage based on large-mode-area (LMA) fibers. In the third stage of MOPA system, based on Er–Yb LMA DC fibers, we used the fabricated power combiner based on LMA-type signal fibers in a configuration (6 + 1) × 1. The presented three-stage MOPA system, utilizing self-fabricated high-power passive fiber components, enables amplification of an input signal of 10 mW up to 44 W of the CW power at the wavelengths of 1555 nm and 1563 nm, corresponding to a gain level of approximately 36.4 dB. View Full-Text
Keywords: fiber amplifier; MOPA system; Er–Yb doped fiber amplifier; high-power amplifier; passive fiber components; power combiner; mode-field adaptor fiber amplifier; MOPA system; Er–Yb doped fiber amplifier; high-power amplifier; passive fiber components; power combiner; mode-field adaptor
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Kaczmarek, P.; Stachowiak, D.; Abramski, K.M. 40 W All-Fiber Er/Yb MOPA System Using Self-Fabricated High-Power Passive Fiber Components. Appl. Sci. 2018, 8, 869.

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