Title :
Generation of over 140-nm-wide super-continuum from a normal dispersion fiber by using a mode-locked semiconductor laser source
Author :
Takushima, Yuichi ; Futami, Fumio ; Kikuchi, Kazuro
Author_Institution :
Res. Center for Adv. Sci. & Technol., Tokyo Univ., Japan
Abstract :
The super-continuum (SC) spectrum flatly broadened over 140-nm 10-dB bandwidth is generated by using a mode-locked semiconductor laser as a pulse source at 1550 nm. In our SC generation system, nearly Fourier-transform limited 0.9-ps pulses obtained through linear and nonlinear pulse compression are incident on a dispersion-flattened fiber having a small normal group-velocity dispersion. While the pulses pass through the normal dispersion fiber, the pulse waveform is adapted to suit the accumulation of a linear chirp, which leads to the flat and wide-band SC spectrum.
Keywords :
Fourier transform optics; chirp modulation; laser mode locking; light sources; optical fibre dispersion; optical modulation; optical pulse compression; optical saturable absorption; optical transmitters; semiconductor lasers; 0.9 ps; 1550 nm; SC generation system; dispersion-flattened fiber; linear chirp; linear pulse compression; mode-locked semiconductor laser source; nearly Fourier-transform limited ps pulses; nonlinear pulse compression; normal dispersion fiber; optical fibre communication; pulse source; pulse waveform; small normal group-velocity dispersion; super-continuum generation; super-continuum spectrum; wide-band SC spectrum; Bandwidth; Chirp; Fiber lasers; Laser mode locking; Optical fiber dispersion; Optical pulse generation; Optical pulses; Pulse compression methods; Pulse modulation; Semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
