文摘
A simple and compact configuration of multiwavelength pulse generator is proposed and experimentally demonstrated, using a SESAM-based passively mode-locked fiber laser together with fiber Fabry–Perot filter. By optimizing the dispersion of fiber ring cavity, a flat rectangular optical spectrum with 3?dB bandwidth of 8.1?nm is obtained, with power fluctuation of <0.5?dB. Inserting a fiber Fabry–Perot filter at the output of passively mode-locked fiber laser, we can simultaneously obtain 40 channels with 0.2?nm wavelength spacing, under the condition of <3?dB power uniformity. After wavelength-division demultiplexing and optic-to-electronic conversion, the full width at half maximum (FWHM) of single channel pulse is measured to be 30?ps while the repetition rate of pulse train is 20.3?MHz.