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Proceedings Paper

20-W 1952-nm tandem hybrid single and double clad TDFA
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Paper Abstract

A simple engineering design is important for achieving high Thulium-doped amplifier (TDFA) performance such as good power conversion, low noise figure (NF), scalable output power, high gain, and stable operation over a large dynamic range. In this paper we report the design, performance, and simulation of two stage high-power 1952 nm hybrid single and double clad TDFAs. The first stage of our hybrid amplifier is a single clad design, and the second stage is a double clad design. We demonstrate TDFAs with an output power greater than 20 W with single-frequency narrow linewidth (i.e. MHz) input signals at both 1952 and 2004 nm. An optical 10 dB bandwidth of 80 nm is derived from the ASE spectrum. The power stage is constructed with 10 μm core active fibers showing a maximum optical slope efficiency greater than 50 %. The experimental results lead to a 1 dB agreement with our simulation tool developed for single clad and double clad TDFAs. Overall this hybrid amplifier offers versatile features with the potential of much higher output power.

Paper Details

Date Published: 26 February 2018
PDF: 13 pages
Proc. SPIE 10512, Fiber Lasers XV: Technology and Systems, 105120Q (26 February 2018); doi: 10.1117/12.2290234
Show Author Affiliations
Clément Romano, Cybel LLC (United States)
Institut Télécom/Télécom ParisTech (France)
Robert E. Tench, Cybel LLC (United States)
Jean-Marc Delavaux, Cybel LLC (United States)

Published in SPIE Proceedings Vol. 10512:
Fiber Lasers XV: Technology and Systems
Ingmar Hartl; Adrian L. Carter, Editor(s)

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