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Proceedings Paper

All-fiber widely tunable thulium laser
Author(s): G. Stevens; T. Legg
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Paper Abstract

We present results from an all-fibre thulium laser system that can be tuned to any wavelength between 1710 – 2110 nm, without using any moving mechanical parts. An Acousto-Optic Tunable Filter (AOTF) is used as the tuning element, which allows for the wavelength to be tuned in ~ 20 μs. Core-pumped and cladding pumped thulium fibres are used to enable lasing action across the wavelength range. We use in-house fabricated fused fibre couplers and combiners that have a flattened coupling response with wavelength to allow for the system to be built in an all fibre design. These couplers have a coupling response that only varies by +/- 10% over the 400 nm operating range. The laser can output powers between 1-5 mW over 1710 – 2110 nm and has a linewidth of <0.2 nm. An Acousto-optic modulator is used as a switch on the output of the laser to switch the signal between core-pumped and cladding-pumped amplifier stages. This allows for the output signals to be amplified to ~1W levels.

Paper Details

Date Published: 11 March 2016
PDF: 6 pages
Proc. SPIE 9728, Fiber Lasers XIII: Technology, Systems, and Applications, 972814 (11 March 2016); doi: 10.1117/12.2203478
Show Author Affiliations
G. Stevens, Gooch and Housego (United Kingdom)
T. Legg, Gooch and Housego (United Kingdom)

Published in SPIE Proceedings Vol. 9728:
Fiber Lasers XIII: Technology, Systems, and Applications
John Ballato, Editor(s)

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