Dual-wavelength mode-locked Yb-doped fiber laser based on Sagnac loop

A dual-wavelength passively mode-locked Yb-doped fiber ring laser with an all-fiber format Sagnac loop as the spectral filters in the all-normal dispersion (ANDi) regime is reported demonstrated. By adjusting the polarization states in the cavity, both the output pulses duration and the central wavelength of mode-locked laser can be changed. The central wavelength of laser output is solely determined by the central wavelength of the channels of the Sagnac loop. It provides a new possibility to achieve an all-fiber format, multiwavelength and mode-locked laser output with the ANDi cavity in a simple and stable manner.