Wavelength-Switchable Dissipative Soliton Fiber Laser With a Chirped Fiber Grating Stop-Band Filter

Abstract

We report a wavelength-switchable single-polarization dissipative soliton (DS) mode-locked fiber laser using a chirped fiber Bragg grating (FBG) for spectral filtering. The chirped FBG, when inserted into the ring cavity, provides a stopband from 1045 nm to 1057 nm, which is used for spectral filtering in this all-normal-dispersion mode-locked Yb-doped fiber laser. The combination of the chirped FBG and the Yb gain profile help the formation of the DS. The laser delivers wavelength-switchable and polarized (28 dB) DS of 6.1 nJ and 29 ps at 1032 nm, and 4.3 nJ and 24 ps at 1068 nm, respectively. To the best of our knowledge, this is the direct proof that a bandpass filter is not indispensible to achieve stable DS in ps fiber lasers.

Pump-controlled wavelength switchable dissipative soliton mode-locked Yb-doped fiber laser using a 45° tilted fiber grating

“…Due to the demand for strong spectral filtering effects [6], the optical filters including Mach-Zehnder interferometer (MZI) [7][8][9], Fabry-Perot interferometer (FPI) [9][10], chirped fiber gratings [11], Sagnac loop filter [12][13] and fiber-based birefringent filter [14], have become the priority for the achievement of wavelength switching in YDFL. Among them, the fiber-based birefringent filter is highly J o u r n a l P r e -p r o o f appreciable in wavelength switchable lasers due to its simple structure and flexibility without adding complexity to the laser cavity.…”