[8p-P07-1~6] 4.3 Laser sources and Laser applications

English Presentation

[8p-P07-4] Wavelength Switching in Mode-Locked Fiber Lasers via Bend-Induced Loss and Transmission Tilt Tuning

〇(D)Yuanjun Zhu^1,2, Bowen Liu³, Maolin Dai^1,2, Yifan Ma^1,2, Shinji Yamashita^1,2, Sze Yun Set² (1.Tokyo Univ., 2.Tokyo Univ, RCAST, 3.Keio Univ.)

Keywords:

Wavelength switching,Bend-induced loss tuning

We demonstrate a wavelength-switchable mode-locked fiber laser by utilizing bend-induced loss and transmission tilt in a polarization-maintaining fiber segment. Both the total loss and the spectral transmission shape can be tuned by adjusting the bending diameter, enabling flexible control over lasing conditions. This passive method allows single-wavelength or dual-wavelength operation, with the latter showing slightly detuned repetition rates suitable for dual-comb applications. Simulation and experimental results confirm that fiber bending introduces not only insertion loss but also wavelength-dependent transmission shaping. The technique is simple, alignment-free, and compatible with all-PM fiber cavities.