Abstract
We propose and experimentally demonstrate a multi-wavelength fiber ring laser under single-longitudinal-mode (SLM) operation with independent tuning of channel numbers and wavelength spacing. Since a programmable filter in the cavity is used as the multi-wavelength selection component, the channel numbers and wavelength spacing can be independently varied by setting the response of programmable filter. Due to the nonlinear polarization rotation arising in the semiconductor optical amplifier, stable multi-wavelength emission can be obtained. For two wavelengths lasing under SLM operation, the wavelength spacing over the operation range of 1,530–1,565 nm can be tuned from 0.46 to 20.54 nm with a resolution of 8 pm. In particular, the power and wavelength fluctuation of individual channel is <0.1 dB and 0.02 nm after 2-h monitoring.
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Acknowledgments
This work was supported by the 863 High Technology Plan (2012AA011301), National Key Scientific Instrument and Equipment Development Project (No. 2013YQ16048702) and National Natural Science Foundation of China (61275069, 61331010).
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Li, H., Huang, T., Fu, S. et al. Single-longitudinal-mode multi-wavelength fiber laser with independent tuning of channel numbers and wavelength spacing. Appl. Phys. B 118, 23–28 (2015). https://doi.org/10.1007/s00340-014-5949-0
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DOI: https://doi.org/10.1007/s00340-014-5949-0