期刊
OPTICS LETTERS
卷 40, 期 1, 页码 81-84出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.40.000081
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- Natural Science and Engineering Research Council of Canada (NSERC)
- Canada Foundation for Innovation (CFI)
- Fonds de recherche du Quebec-Nature et technologies (FRQ.NT)
Single-frequency laser emission from a distributed feedback all-fiber laser operating in the vicinity of 3 mu m is demonstrated. The laser cavity was made of a 30 mm long pi-phase-shifted fiber Bragg grating inscribed in a heavily erbium-doped fluoride fiber using infrared femtosecond pulses and the dithering phase-mask technique. A maximum CW output power of 12 mW was obtained at 2794.4 nm by using a multimode pumping scheme. The narrow linewidth was characterized to be lower than 20 kHz using a heterodyne technique. This achievement represents a significant step toward the development of active frequency references operating in the mid-infrared. (C) 2014 Optical Society of America
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