Multiwavelength erbium-doped fiber laser using a moiré Bragg grating in polarization-maintaining fiber

Abstract

A multi-wavelength erbium-doped fiber laser using a Moire Bragg grating in polarization-maintaining fiber is proposed. Two Moire Bragg gratings in Polarization-maintaining fiber are respectively fabricated successfully through stretching and double, triplicate exposure method. The two gratings fabricated respectively have four and six reflection peaks and are respectively incorporated in the linear erbium-doped fiber laser cavities to perform mode-selection and output coupler functions. The proposed laser can be made to operate in simultaneous four-wavelength or six-wavelength operations when the EDF is cooled in liquid nitrogen (77K).