A technique for significantly suppressing severe fourth-order dispersion of ultrashort optical pulses in long-distance transmission is analyzed by use of the quadratic phase from the excess second-order dispersion of the fiber link in conjunction with synchronously applied cosine phase modulation of temporally stretched pulses. Numerical simulation predicts much improved transmission of 250-fs pulses at 5–10-GHz repetition rates over ∼100 km of fiber by π–3.5π phase modulation.
© 2000 Optical Society of America
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(060.5060) Fiber optics and optical communications : Phase modulation
(320.5540) Ultrafast optics : Pulse shaping
M. D. Pelusi, Y. Matsui, and A. Suzuki, "Fourth-order dispersion suppression of ultrashort optical pulses by second-order dispersion and cosine phase modulation," Opt. Lett. 25, 296-298 (2000)