Title :
Simultaneous dual-wavelength operation in cascaded strongly gain-coupled DFB lasers
Author :
Hong, J. ; Finlay, R. ; Tong, R. ; Rogers, C. ; Goodchild, D.
Author_Institution :
Nortel Networks Corp., Ottawa, Ont., Canada
Abstract :
Using cascaded strongly gain-coupled (SGC) DFB lasers, simultaneous dual-wavelength operation can be obtained with better than a 40-dB side-mode suppression ratio (SMSR) under simple operating conditions at various temperatures. Dual-wavelength operation with various spacing can be achieved by grating fabrication and by simply activating the lasing section of the cascaded SGC DFB lasers. The lasing wavelengths can be tuned within several nanometers by base temperature variation and their spacing can be fine tuned by individual injection current.
Keywords :
diffraction gratings; distributed feedback lasers; laser modes; optical fabrication; ridge waveguides; semiconductor lasers; waveguide lasers; cascaded SGC DFB lasers; cascaded strongly gain-coupled DFB lasers; dual-wavelength operation; fine tuned; grating fabrication; individual injection current; lasing section; side-mode suppression ratio; simple operating conditions; simultaneous dual-wavelength operation; temperature variation; Distributed feedback devices; Gratings; Laser modes; Laser theory; Laser tuning; Masers; Quantum cascade lasers; Quantum well lasers; Semiconductor lasers; Temperature;
Journal_Title :
Photonics Technology Letters, IEEE
