Wavelength-tunable active mode locking of a novel fiber laser including fiber gratings

Summary form only given. The generation of gigahertz pulse trains has been an attractive subject in many applications such as time- and wavelength-division multiplexed optical communications. Here we report a simple and novel active mode-locked fiber laser. Unlike previously reported work, fiber gratings are used to play the simultaneous roles of wavelength-selective mirrors, tunable optical filters, and output fiber couplers. Simultaneous dual-wavelength operation has also been successfully demonstrated using two fiber gratings written in series. The tuning of the dual-wavelength output can also be achieved using the strain tuning method.