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Tunable Multiwavelength Passively Mode-Locked Fiber Ring Laser Using Intracavity Birefringence-Induced Comb Filter

2010; Institute of Electrical and Electronics Engineers; Volume: 2; Issue: 4 Linguagem: Inglês

10.1109/jphot.2010.2051023

1943-0655

Zhi‐Chao Luo, Ai‐Ping Luo, Wen‐Cheng Xu, Haisen Yin, Jiarui Liu, Qing Ye, Zujie Fang,

Photonic Crystal and Fiber Optics

A simple configuration for the generation of tunable multiwavelength picosecond-pulse fiber ring lasers by exploiting the intracavity birefringence-induced comb filter is demonstrated. The fiber laser is passively mode locked by using nonlinear polarization rotation (NPR) technique. The polarization-dependent isolator combined with the intracavity birefringence acts as two functions: the tunable comb filter and the mode locker. Up to four-wavelength picosecond pulses were simultaneously obtained in the experiment. The mode competition of the multiwavelength lasing is suppressed by the use of NPR-induced intensity-dependent loss. In addition, the number of the lasing wavelengths, the lasing location, and the spacing between the lasing wavelengths could be flexibly tuned by properly rotating the polarization controllers.