| Citation: | WU Qiong, GAO Bo, ZHOU Lu-yao, WEN Hong-lin, QIAO Fei-hong, WU Bing, XU Ting, LI Qi, LI Ying-ying, WU Ge, LIU Lie. Multi-wavelength pulses in synchronized mode-locked fiber lasers[J]. Chinese Optics. doi: 10.37188/CO.EN-2025-0039
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We designed and investigated a passive synchronized mode-locked fiber laser. The device utilizes a dual-cavity structure driven by the Nonlinear Polarization Rotation (NPR) mechanism. Stable mode-locking is attained by synergistically controlling gain, polarization state, and optical path length in two symmetric sub-cavities. Experiments proved the sub-cavity repetition frequency's tunability via the time delay line (TDL), thereby enabling synchronized mode-locking. The system stably generates multi-wavelength pulses at a single repetition frequency, evidenced by multiple spectral peaks and equidistant pulse sequences. These findings facilitate the development of high-performance multi-wavelength ultrashort pulse sources, crucial for optical communications, spectral analysis, and remote sensing.
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