Spectral narrowing and stabilization of thulium fiber lasers using guided-mode resonance filters |
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| Authors: | Sims R Andrew Roth Zachary A Willis Christina C C Kadwani Pankaj McComb Timothy S Shah Lawrence Sudesh Vikas Poutous Menelaos Johnson Eric G Richardson Martin |
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| Institution: | Townes Laser Institute, CREOL College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, USA. rasims@creol.ucf.edu |
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| Abstract: | We used guided-mode resonance filters (GMRFs), fabricated using thin-film deposition and chemical etching, as intracavity feedback elements to stabilize and narrow the output spectrum in thulium-doped fiber oscillators operating in the 2?μm wavelength regime, producing linewidths of <700?pm up to 10?W power levels. A Tm fiber-based amplified spontaneous emission source was used to characterize the reflective properties of the GMRFs. Linewidths of 500?pm and a 7.3?dB reduction in transmission were measured on resonances. |
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