Title :
Spectral linewidth of MQW DFB lasers with intensity-modulated TM-polarized light injection
Author :
Yasaka, Hiroshi ; Kasaya, Kazuo ; Takahata, Kiyoto ; Naganuma, Mitsuru
Author_Institution :
NTT Optoelectron. Lab., Kanagawa, Japan
fDate :
7/1/1992 12:00:00 AM
Abstract :
The spectral linewidth of a multiple-quantum-well (MQW) distributed feedback (DFB) laser is measured when intensity-modulated orthogonally polarized (transverse magnetic (TM) mode) is injected into the laser. The spectral linewidth does not change when the modulation frequency is higher than several hundred megahertz and is almost the same as without light injection. However, it broadens when the injected orthogonally polarized light modulation frequency is close to zero. The line shape of the MQW DFB laser´s lasing light becomes non-Lorentzian in shape below a modulation frequency of 500 MHz.<>
Keywords :
distributed feedback lasers; laser modes; light polarisation; optical modulation; semiconductor junction lasers; spectral line breadth; (transverse magnetic; MQW DFB lasers; TM-polarized light injection; diode laser modes; distributed feedback; injected orthogonally polarized light modulation frequency; intensity-modulated; lasing light; modulation frequency; multiple-quantum-well; nonLorentzian spectral line shape; orthogonally polarized; spectral linewidth; Distributed Bragg reflectors; Distributed feedback devices; Frequency; Laser feedback; Laser modes; Optical films; Optical modulation; Optical polarization; Quantum well devices; Semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
