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 2μm wavelength regime, producing linewidths of <700pm up to 10W power levels. A Tm fiber-based amplified spontaneous emission source was used to characterize the reflective properties of the GMRFs. Linewidths of 500pm and a 7.3dB reduction in transmission were measured on resonances.

© 2011 Optical Society of America

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