Inhomogeneous loss generated by multimode laser linewidth broadening in an optical fiber is experimentally studied. With this mechanism, multiwavelength lasing is achieved by use of either fiber Raman gain or erbium-doped fiber gain. Through various pump powers and optical filter bandwidths, the relationship between inhomogeneous loss and the performance of a multiwavelength fiber laser is studied, and a physical explanation is provided.
© 2005 Optical Society of America
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(140.3500) Lasers and laser optics : Lasers, erbium
(140.3550) Lasers and laser optics : Lasers, Raman
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
Lasers and Laser Optics
Qing Wang, Xiaoming Liu, Lei Xing, Xue Feng, and Bingkun Zhou, "Experimental investigation of an inhomogeneous loss and its influence on multiwavelength fiber lasers," Opt. Lett. 30, 3033-3035 (2005)