Bandwidth Programmable Optical Nyquist Pulse Generation in Passively Mode-Locked Fiber Laser

We propose and numerically demonstrate a novel simple method to produce optical Nyquist pulses based on pulse shaping in a passively mode-locked fiber laser with an in-cavity flat-top spectral filter.The proposed scheme takes advantage of the nonlinear in-cavity dynamics of the laser and offers Artwork the possibility to generate high-quality sinc-shaped pulses with widely tunable bandwidth directly from the laser oscillator.We also show that the use of a filter with a corrective convex profile relaxes Evening Gown the need for large nonlinear phase accumulation in the cavity by offsetting the concavity of the nonlinearly broadened pulse spectrum.