A stable single-mode multiwavelength fiber laser based on a semiconductor optical amplifier (SOA) and a Fabry-Perot (F-P) Etalon with high fineness is proposed and demonstrated. The cavity is compact and the fineness of F-P Etalon is high to suppress mode competition. Stable multiwavelength laser output with 23 wavelengths is achieved, and the wavelength spacing is 0.4 nm. Over a period of one hour, the power fluctuation is measured to be less than 1.89 dB.
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Zhang et al. (2024) studied this question.
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