Optical Single Sideband Modulation Using Strong Optical Injection-Locked Semiconductor Lasers
Hyuk-Kee Sung
Lau, E.K.
Wu, M.C.
Univ. of California at Berkeley, Berkeley;
This paper appears in: Photonics Technology Letters, IEEE
Publication Date: July1, 2007
Volume: 19,
Issue: 13
On page(s): 1005-1007
ISSN: 1041-1135
INSPEC Accession Number: 9591340
Digital Object Identifier: 10.1109/LPT.2007.898760
Current Version Published: 2007-06-11
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.
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