期刊
OPTICS AND LASER TECHNOLOGY
卷 50, 期 -, 页码 145-149出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2013.01.022
关键词
Multi-wavelength fiber laser; Erbium-doped photonic crystal fiber; Nonlinear polarization rotation
A multi-wavelength erbium-doped photonic crystal fiber (ED-PCF) ring laser based on nonlinear polarization rotation was demonstrated experimentally. To the best of our knowledge, this study is the first to use a polarization-dependent isolator with an ED-PCF to form an equivalent fiber filter. The intensity-dependent inhomogeneous loss induced by nonlinear polarization rotation was applied to reduce the mode competition caused by ED-PCF. A detailed theoretical analysis using the Jones matrix method to calculate the transfer function of the laser was presented. The theoretical data, which were confirmed by the experimental results, showed that a multi-wavelength with a spacing of approximately 2.26 nm was achieved by controlling the polarization controller. The proposed fiber laser with a signal-to-noise ratio higher than 40 dB achieved a low threshold power of 30 mW. Therefore, stable multi-wavelength outputs with a power fluctuation of less than 2 dB were generated at room temperature. (c) 2013 Elsevier Ltd. All rights reserved.
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