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arXiv · 2512.12741

Intracavity-birefringence-enabled soliton states and wavelength control in the (C + L)-band fiber lasers

Chuangkai Li·Feng Ye·Hong Jin·Xuanyi Liu·H. Y. Fu·Boris A. Malomed·Qian Li
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Abstract

We demonstrate a compact all-fiber nonlinear-polarization-evolution (NPE) fiber laser capable of outputting wavelength-manipulated multiple laser states in the C + L band. Leveraging the intracavity birefringence-induced filtering effect, without external spectral filters, the laser achieves wavelength-tunable conventional solitons (CSs) and soliton molecules (SMs) with a tuning range of 72.85 nm and 45.54 nm, respectively, by adjusting the polarization states and pump power. Furthermore, wavelength-switchable harmonic mode-locking (over 1 GHz) and dual-wavelength mode-locking can also be achieved in the C + L band. To the best of our knowledge, this is the first experimental realization of wavelength-manipulated multiple soliton states covering the C + L band in a single-fiber-laser oscillator. Two examples of digital multi-letter encoding and transmission are further demonstrated on this platform by means of pump-driven wavelength/soliton states switching. By enabling controllable multi-state solitons and broad spectral tunability within a compact architecture, our work provides a promising source for spectrally diverse and temporally stable pulsed light sources that hold significant promise for applications in microscopy, bioimaging, and LiDAR.

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Chuangkai Li, Feng Ye, Hong Jin, Xuanyi Liu, H. Y. Fu, Boris A. Malomed, Qian Li. 2025-12-14. Intracavity-birefringence-enabled soliton states and wavelength control in the (C + L)-band fiber lasers. https://arxiv.org/abs/2512.12741

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