We report on an erbium-doped, mode-locked fiber laser incorporated with various phase-biased nonlinear amplifying loop mirrors. Our cavity employs all polarization-maintaining fibers so that the laser is environmentally stable and insensitive to thermal and mechanical perturbations. The laser with a phase bias directly delivers 1.20 ps pulses at a repetition rate of 88.2 MHz. The output power is 37.0 mW and the single-pulse energy is ~0.42 nJ, when the pump power is 450 mW. Since the phase bias plays an important role in enhancing self-starting properties, we mainly investigate the self-starting threshold and the phase noise of the fiber oscillator using three diverse phase biases. It is found that compared with and waveplates, the laser employing a waveplate has a lower self-starting threshold and higher phase noise.

中文翻译：

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一种由不同偏置非线性放大环镜锁定的全保偏光纤激光器

我们报告了一种掺铒锁模光纤激光器，该激光器与各种相位偏置非线性放大回路镜相结合。我们的腔体采用所有保偏光纤，因此激光器对环境稳定且对热和机械扰动不敏感。具有相位偏置的激光器以 88.2 MHz 的重复率直接提供 1.20 ps 脉冲。当泵浦功率为 450 mW 时，输出功率为 37.0 mW，单脉冲能量为 ~0.42 nJ。由于相位偏置在增强自启动性能方面起着重要作用，我们主要使用三种不同的相位偏置来研究光纤振荡器的自启动阈值和相位噪声。结果表明，与波片相比，采用波片的激光器具有较低的自启动阈值和较高的相位噪声。