Title

Spectral Narrowing And Stabilization Of Thulium Fiber Lasers Using Guided-Mode Resonance Filters

Keywords

Fiber lasers; Laser stabilization; Thulium

Abstract

Guided mode resonance filters (GMRF) were used to spectrally-stabilize and line-narrow the output spectrum from Tm fiber lasers operating in the 2 μm wavelength regime. The GMRFs were placed in the output path of an amplified spontaneous emission (ASE) light source and the transmitted light was measured as a notch in the spectrum on resonance. The GMRFs were characterized to determine their peak reflectivity, resonance wavelength, and spectral linewidth of each element. These measurements showed various resonance wavelengths and linewidths varying from 0.50-1.5 nm depending on the individual GMRF parameters. Using GMRFs as feedback elements in Tm fiber laser oscillators resulted in output powers up to 10 W and slope efficiencies of 30-45% with respect to launched 790 nm pump power. In order to scale to higher powers and maintain narrow linewidths, a master oscillator power amplifier (MOPA) setup was employed with a GMRF stabilized master oscillator. In addition to the laser and amplifier characteristics, thermal and damage testing of the GMRFs is reported. © 2010 Copyright SPIE - The International Society for Optical Engineering.

Publication Date

5-10-2010

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

7580

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.842474

Socpus ID

77951825256 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77951825256

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