Title :
Optical Single Sideband Modulation Using Strong Optical Injection-Locked Semiconductor Lasers
Author :
Sung, Hyuk-Kee ; Lau, Erwin K. ; Wu, Ming C.
Author_Institution :
Univ. of California at Berkeley, Berkeley
fDate :
7/1/2007 12:00:00 AM
Abstract :
We report on the experimental demonstration of optical single sideband (SSB) modulation using a directly modulated semiconductor laser under strong optical injection-locking. Modulation sidebands with 15-dB power ratio between the lower and upper sidebands have been achieved. The longer wavelength sideband is resonantly amplified by the injection-locked laser cavity mode. The radio-frequency performance of the optical SSB after 80-km fiber transmission is significantly improved compared with a typical symmetric sideband modulation of a free-running laser. A 622-Mb/s data transmission on a 20-GHz subcarrier is demonstrated over an 80-km fiber link.
Keywords :
laser mode locking; optical modulation; radio-over-fibre; semiconductor lasers; bit rate 622 Mbit/s; data transmission; distance 80 km; fiber link; frequency 20 GHz; injection-locked laser cavity mode; optical injection-locked semiconductor lasers; optical single sideband modulation; radiofrequency performance; Amplitude modulation; Distributed feedback devices; Fiber lasers; Frequency modulation; Laser modes; Optical feedback; Optical filters; Optical modulation; Radio frequency; Semiconductor lasers; Fiber chromatic dispersion; optical injection-locking; optical single sideband (SSB);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.898760
