Journal article
High power Yb-doped photonic bandgap fiber oscillator at 1178 nm
Institute for Laser Science, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan. fanxinyan@ils.uec.ac.jp1
An ytterbium-doped solid-core photonic bandgap fiber oscillator in an all-fiber format is investigated for high power at an extreme long wavelength. The photonic bandgap fiber is spliced with two fiber Bragg gratings to compose the cavity. The sharp-cut bandpass distributed filtering effect of the photonic bandgap fibers efficiently suppresses amplified spontaneous emission in the conventional high-gain region.
Fine adjustment of the short cut-off wavelength by coiling with tighter diameter is performed to suppress parasitic lasing. A record output power of 53.6 W with a slope efficiency of 53% at 1178 nm was demonstrated.
Language: | English |
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Publisher: | The Optical Society |
Year: | 2012 |
Pages: | 14471-14476 |
ISSN: | 10944087 |
Types: | Journal article |
DOI: | 10.1364/OE.20.014471 |