We propose an all-fiber mode-locking device, which operates based on nonlinear switching in a novel two-concentric-core fiber structure. The design is particularly attractive given the ease of fabrication and coupling to other components in a mode-locked fiber laser cavity. The nonlinear switching in this coupler is studied, and the relative power transmission is obtained. The analysis shows that this nonlinear switch is practical for mode-locking fiber lasers and is forgiving to fabrication errors.
© 2014 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: June 2, 2014
Revised Manuscript: July 1, 2014
Manuscript Accepted: July 4, 2014
Published: August 5, 2014
Elham Nazemosadat and Arash Mafi, "Nonlinear switching in a two-concentric-core chalcogenide glass optical fiber for passively mode-locking a fiber laser," Opt. Lett. 39, 4675-4678 (2014)