We demonstrate a 2.15 MHz repetition-rate mode-locked figure-of-9 erbium-doped fiber laser at a center wavelength of 1550 nm by using an all-polarization-maintaining nonlinear amplifying loop mirror configuration. This laser can be self-started mode-locked and generate Gaussian-shape noise-like pulses (NLPs). The single pulse energy is approximately 11.68 nJ at a repetition rate of 2.15 MHz. Dispersion compensation fibers are added into the cavity to make the laser operate in a net normal dispersion regime and generate NLPs at the center wavelength of 1550 nm. These characteristics give it a great application potential, such as low spectral coherence interference, optical sensing and micromachining. In addition, we have investigated the evolution of these characteristics, contributing to further understanding the Gaussian-shape NLP.

我们通过使用全偏振保持非线性放大环路镜配置，展示了中心波长为 1550 nm 的 2.15 MHz 重复率锁模 9 字掺铒光纤激光器。这种激光器可以自启动锁模并产生高斯形状的类噪声脉冲 (NLP)。在 2.15 MHz 的重复频率下，单脉冲能量约为 11.68 nJ。色散补偿光纤被添加到腔体中，使激光器在净正常色散状态下工作，并在 1550 nm 的中心波长产生 NLP。这些特性使其具有很大的应用潜力，例如低光谱相干干涉、光学传感和微加工。此外，我们研究了这些特征的演变，有助于进一步理解高斯形状的 NLP。