Wavelength-tunable passively mode-locked fiber lasers

In order to achieve special center wavelength in mode-locked fiber lasers,the experimental study of wavelength-tunable Yb3+doped fiber lasers using the nonlinear optical loop mirror(NOLM) for mode-locked operating is reported.The fiber laser is self-starting easily and the operating center wavelength can be tuned from 1030nm to 1081nm.The fiber laser can generate 2.05mW average power of 234.375ps pulse duration at a repetition rate of 3.842MHz when the operating center wavelength is 1053nm and spectrum width is about 6nm.The self-starting of the mode-locked fiber laser can be achieved easily,and the mode-locked operation can be hardly influenced by the environment disturbance in days.It can produce the special center wavelength,and is to be applied in science and engineering as a center wavelength-tunable mode-locked fiber laser.