Experimental characterization of an Yb-doped fiber ring laser with frequency-shifted feedback |
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Authors: | VV Ogurtsov VM Khodakovskyy G Bonnet |
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Institution: | a Institute of Physics, Ukrainian Academy of Sciences, Prospect Nauki 46, Kiev-39, 03650, Ukraine b Universität Kaiserslautern, 67653 Kaiserslautern, Germany |
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Abstract: | We present experimental characteristics of an Yb3+-doped fiber ring laser operating with frequency-shifted feedback (FSF) through an acousto-optic modulator (AOM) and seeded by both a stationary continuous-wave (CW) laser and spontaneous emission. We show the spectrum and output characteristics for operations with several effective gain bandwidths, as established by Fabry-Perot etalons inside the cavity. Observation using a high finesse Fabry-Perot interferometer shows that, as expected from earlier work, although the spectrum of the FSF laser without seeding is continuous, when seeded by a CW-laser the spectrum consists of a comb of discrete modes, each offset from the seed by an integer number of AOM frequency shifts. The experimental results are in excellent quantitative agreement with the theory developed earlier L. Yatsenko, B.W. Shore, K. Bergmann, Opt. Commun. 236 (2004) 183]. |
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Keywords: | 42 55 &minus f 42 60 Da 42 55 Ah |
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