Gain spectra in ytterbium-erbium metaphosphate glasses for microlasers

Асеев, В. А.; Zlatov, A. S.; Никоноров, Н. В.; Przhevuskii, A. K.; Fedorov, Yu. K.

doi:10.1364/jot.75.000203

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“…Different wavelength SF ytterbium-doped fiber lasers were reported by many groups: a SF fiber laser operating at 2.9 μm with a slope efficiency of 1.4% by Hudson et al [1], a SF fiber ring laser with 1 W output power at 1.5 μm with a slope efficiency of 5% by Marciante et al and a higher-power 10 W SF secondharmonic-generation ytterbium fiber laser in PPKTP and MgO:sPPLT at 532 nm based on a SF 1064 nm ytterbium fiber laser as the fundamental pump source by Kumar and co-workers [2][3][4]. Moreover, ytterbium-ion-doped fibers are widely employed as active media in lasers and laser amplifiers [5], especially for high-efficiency and high-power CW or shortpulse lasers in the 1.0-1.1 μm region [6,7].…”

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confidence: 99%

Slope efficiency over 30% single-frequency ytterbium-doped fiber laser based on Sagnac loop mirror filter

Yin

Huang

et al. 2013

Appl. Opt.

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A high-slope-efficiency single-frequency (SF) ytterbium-doped fiber laser, based on a Sagnac loop mirror filter (LMF), was demonstrated. It combined a simple linear cavity with a Sagnac LMF that acted as a narrow-bandwidth filter to select the longitudinal modes. And we introduced a polarization controller to restrain the spatial hole burning effect in the linear cavity. The system could operate at a stable SF oscillating at 1064 nm with the obtained maximum output power of 32 mW. The slope efficiency was found to be primarily dependent on the reflectivity of the fiber Bragg grating. The slope efficiency of multi-longitudinal modes was higher than 45%, and the highest slope efficiency of the single longitudinal mode we achieved was 33.8%. The power stability and spectrum stability were <2% and <0.1%, respectively, and the signal-to-noise ratio measured was around 60 dB.

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