Switching-wavelength pulse source constructed from a dispersion-managed SOA fiber ring laser
KL Lee, C Shu
IEEE PHOTONICS TECHNOLOGY LETTERS | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | Published : 2003
A new approach to generate switching-wavelength picosecond pulses is developed based on a dispersion-managed semiconductor optical amplifier (SOA) fiber laser cavity. Gain modulation on a 1.55-μm SOA is used together with subharmonic gating of pulses in the cavity. An 8-GHz, eight-wavelength output is obtained with a constant spacing of 0.91 nm between neighboring wavelengths. The wavelength channels have nearly identical peak powers. The total amplitude and time jitter of the output is measured to be smaller than 0.4 ps. The spacing and the number of output wavelengths can be easily tuned by changing the operating frequency and the subharmonic ratio without modifying the optical cavity.