We present an all-polarization-maintaining (PM) compact passively mode-locked fiber laser using a PM wavelength division multiplexer (WDM)-isolator-tap (WIT) hybrid device with good stability. Compared with inserting the WDM, isolator, and tap into a traditional cavity, only a PM WIT device could simultaneously inject the pump light into the cavity, control the unidirectional operation of the ring cavity, and provide the lasing output from the cavity. With this simple structure, the system generated a soliton pulse of 1.085 ps at 17.77 MHz, with a 54 dB signal-to-noise ratio (SNR).

中文翻译：

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基于WDM-Isolator-Tap混合器件的全偏振保持被动锁模掺b光纤激光器

我们提出了一种全偏振保持（PM）紧凑型被动锁模光纤激光器，它使用具有良好稳定性的PM波分复用器（WDM）-isolate-tap（WIT）混合设备。与将WDM，隔离器和分接头插入传统腔体相比，只有PM WIT设备可以同时将泵浦光注入腔体，控制环形腔体的单向操作，并提供腔体的激光输出。通过这种简单的结构，系统在17.77 MHz处产生了1.085 ps的孤子脉冲，信噪比（SNR）为54 dB。