Abstract
A wide-band tunable femtosecond pulse fiber laser was demonstrated by using the intracavity-birefringence induced spectral filtering effect. The nonlinear polarization rotation (NPR) technique is used to achieve passive mode-locking femtosecond pulses. Taking advantage of the intracavity-birefringence induced spectral filtering effect, the center wavelength of the mode-locked femtosecond pulse can be continuously tuned from 1532 to 1570 nm by properly rotating the polarization controller (PC). The mechanism of the wavelength tuning operation is discussed. Furthermore, the experimental observation was confirmed by the numerical simulations.
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