Abstract A wavelength-number-tunable multi-wavelength SOA fiber laser incorporating a double pass Mach–Zehnder interferometer (MZI) is experimentally demonstrated in this paper. Due to the nonlinear polarization rotation (NPR) effect of SOA, the intensity-dependent loss (IDL) is induced by the combination consisting of SOA and polarization devices to achieve stable multiwavelength output with ultra-narrow wavelength spacing. In addition, the degree of IDL can be controlled by adjusting PCs for the purpose of tuning the number of wavelengths. Stable multiwavelength output with power equality have been achieved at room temperature, which have no obvious power fluctuation. The wavelength spacing is ultra-narrow, which is as small as 0.081 nm, and the number of lasing lines is tuned from 168 to 250. However, due to the high noise figure of SOA, the optical signal-to-noise ratios (OSNR) is less than 8.85 dB.

中文翻译：

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基于NPR效应的波长数可调多波长SOA光纤激光器

摘要 本文通过实验证明了一种波长数可调的多波长 SOA 光纤激光器，它结合了双通马赫-曾德干涉仪 (MZI)。由于 SOA 的非线性偏振旋转 (NPR) 效应，SOA 和偏振器件组成的组合会引起强度相关损耗 (IDL)，以实现超窄波长间隔的稳定多波长输出。此外，为了调整波长数，可以通过调整PC来控制IDL的程度。常温下实现了功率均等的多波长稳定输出，无明显功率波动。波长间隔超窄，小至0.081 nm，激光线数从168条调谐至250条。 但由于SOA的高噪声系数，