HIGH-POWER SOLITON FIBER LASER-BASED ON PULSE-WIDTH CONTROL WITH CHIRPED FIBER BRAGG GRATINGS

Chirped fiber Bragg gratings control the pulse width and energy in Ker r mode-locked erbium fiber soliton lasers. We create high-energy pulse s by providing large amounts of excessive negative dispersion, which i ncreases the pulse width while keeping the nonlinearity of the cavity constant. With a chirped fiber grating of 3.4-ps2 dispersion, 3-ps pul ses with an energy content higher than 1 nJ are generated at a repetit ion rate of 27 MHz. By controlling the polarization state in the cavit y, we obtain a tuning range from 1.550 to 1.562 mum.