1. Widely tunable multi-wavelength passively mode-locked Yb-doped fiber laser operation in an all-normal-dispersion regime.
- Author
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Zhu, Xiaojun, Geng, Jian, Jin, Li, Cao, Juan, Ji, Yancheng, Zou, Li, Xu, Chen, and Zhang, Guoan
- Subjects
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ALGORITHMS , *NONLINEAR difference equations , *DOPED semiconductors , *WAVELENGTH measurement , *FIBER lasers - Abstract
Abstract We have demonstrated the generation of widely tunable spectral multi-wavelength all-normal-dispersion (ANDi) Yb-doped fiber laser based on nonlinear polarization evolution (NPE) as the passively mode-locking mechanism. An easy-controlling tunable passband filter fabricated through a phase-shift long-period grating (PS-LPG) is employed to tune and control the wavelength in the laser cavity. By combining the character of the emission cross section of Yb-doped fiber, the tunable spectral ranges of the dual- and triple-wavelength pulses output is up to ∼20 nm and ∼7 nm, respectively. To our knowledge, it's the widest of tuning spectral range in the both dual- and triple-wavelength ANDi Yb-doped fiber laser with controllable and all-fiber format filter. The proposed method may provide a simple way to obtain a broad spectral range with multi-wavelength output in fiber laser systems. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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