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

Clément Romano; Robert E. Tench; Jean-Marc Delavaux

doi:10.1117/12.2290234

26 February 2018 20-W 1952-nm tandem hybrid single and double clad TDFA

Clément Romano, Robert E. Tench, Jean-Marc Delavaux

Proceedings Volume 10512, Fiber Lasers XV: Technology and Systems; 105120Q (2018) https://doi.org/10.1117/12.2290234
Event: SPIE LASE, 2018, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Clément Romano, Robert E. Tench, and Jean-Marc Delavaux "20-W 1952-nm tandem hybrid single and double clad TDFA", Proc. SPIE 10512, Fiber Lasers XV: Technology and Systems, 105120Q (26 February 2018); https://doi.org/10.1117/12.2290234

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