Accession Number : ADP008104

Title :   Potential Chirpless Lasers with InGaAs/InGaAsP Strained Quantum Well,

Corporate Author : NIPPON TELEGRAPH AND TELEPHONE CORP IBARAKI OPTO-ELECTRONIC LABS

Personal Author(s) : Yamanaka, Takayuki ; Yoshikuni, Yuzo ; Lui, Wayne ; Yokoyama, Kiyoyuki ; Seki, Shunji

Report Date : APR 1992

Pagination or Media Count : 2

Abstract : The boost on gain, differential gain and reduction of the linewidth enhancement factor in InGaAs on InP system due to compressive strain have recently been demonstrated theoretically. The linewidth enhancement factor alpha (hereafter termed as the alpha parameter) is a key parameter in determining wavelength chirping and laser linewidth. Up to now, theoretical studies on strained quantum well(QW) lasers have been limited to lasing characteristics at gain peak, which implies the assumption of Fabry-Perot cavity. On the other hand, distributed feedback(DFB) lasers, which is an indispensable light source in optical transmission system, have the feature where the lasing wavelength can be tuned independent of the gain peak. The application of this feature is called detuning. In this paper, we discuss ways of designing lasers with extremely small a parameter(chirpless lasers) by detuning strained modulation doped(MD) QW lasers.

Descriptors :   *SEMICONDUCTOR LASERS, *LIGHT MODULATORS, AUGMENTATION, DETUNING, FEEDBACK, GAIN, LIGHT SOURCES, MODULATION, PARAMETERS, REDUCTION, LASER CAVITIES, INDIUM PHOSPHIDES, GALLIUM ARSENIDES, FABRY PEROT INTERFEROMETERS, CHIRP FILTERS, JAPAN.

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE