Wang Zhaokun, Wu Wendi, Zhu Tianyu, Hua Kuo, Chang Shuo, Wang D N, Gao Feng
Opt Lett. 2021 Jan 1;46(1):118-121. doi: 10.1364/OL.412739.
In this Letter, we implement a multimode fiber (MMF) laser system mode-locked by a nonlinear polarization rotation technique for controllable synchronous multi-wavelength soliton generation. The synchronization of the repetition rates for different wavelengths is realized by the special mode transmission in MMF. For dual-wavelength mode-locking at 1566.7 nm and 1617.2 nm, each of the synchronously mode-locked solitons consists of a train of quasi-periodic beat pulses with a pulse width of 84 fs and period of 162 fs. The total output power reaches 532 mW with optimally balanced two-color intensities. Furthermore, switchable dual- and tri-wavelength synchronized femtosecond pulses are also obtained. In contrast to previous reports, this synchronously mode-locked multi-wavelength is output directly from a laser oscillator, which provides a simpler candidate to achieve pulse synchronization.
在本信函中，我们实现了一种采用非线性偏振旋转技术锁模的多模光纤（MMF）激光系统，用于可控同步多波长孤子产生。不同波长重复率的同步通过MMF中的特殊模式传输来实现。对于1566.7 nm和1617.2 nm的双波长锁模，每个同步锁模孤子由一系列准周期拍频脉冲组成，脉冲宽度为84 fs，周期为162 fs。在双色强度最佳平衡时，总输出功率达到532 mW。此外，还获得了可切换的双波长和三波长同步飞秒脉冲。与之前的报道相比，这种同步锁模多波长直接从激光振荡器输出，为实现脉冲同步提供了更简单的方案。
