Fiber laser system

A fiber laser system comprising:

• a pump laser generating a pump laser beam;
• and
• a length of optical fiber optically coupled to the pump laser, the length of optical fiber having:
• a laser cavity having a cavity path, a first fiber Bragg grating having a first reflectivity profile, a second filter having a second filter profile, and an optical gain region between the first fiber Bragg grating and the second filter along the cavity path, the first reflectivity profile being spectrally detuned from the second filter profile, the first reflectivity profile and the second filter profile being one of:
• spectrally non-overlapping, and spectrally overlapping only to the extent that adjacent tails of the first reflectivity profile and the second filter profile overlap with one another, the first fiber Bragg grating having a first refractive index profile comprising a full width at half maximum bandwidth of at least 0.2 nm and a Gaussian-like apodization, wherein, upon pumping of the optical gain region with the pump laser beam and mode locking of the laser cavity, optical pulses are circulated along the cavity path;
• and
• an output optically coupled to the laser cavity and outputting at least a portion of the optical pulses.