We present a technique for suppression of wavelength competition in rare-earth-doped fiber lasers and for obtaining simultaneous lasing at tens (up to several hundred) of laser lines with wavelength spacing down to 50 pm. An ytterbium-doped fiber laser is used for experimental demonstration. Spectral selection is based on a built-in Lyot filter whose length can be selected to set suitable wavelength spacing. The measured linewidth for each of the generated lines is less than 100 pm and can be as little as 20 pm. The method for mode competition suppression is based on the gain-switching technique with modulated pump. At certain modulation parameters (amplitude, duration, and repetition rate), the laser generates a stable sequence of microsecond pulses with ~1 W peak power and ~4 μ J energy consisting of many longitudinal modes.

中文翻译：

---

多波长增益切换掺Y光纤激光器

我们提出了一种抑制稀土掺杂光纤激光器中的波长竞争并获得数十根（多达几百根）波长间隔小于50 pm的激光线同时发射激光的技术。掺fiber光纤激光器用于实验演示。光谱选择基于内置的Lyot滤波器，可以选择其长度来设置合适的波长间隔。每个生成的线的测量线宽小于100 pm，并且可以低至20 pm。抑制模式竞争的方法基于具有调制泵浦的增益切换技术。在某些调制参数（振幅，持续时间和重复频率）下，激光产生稳定的微秒脉冲序列，峰值功率约为1W，能量约为4μJ，由许多纵向模式组成。