Title :
Wavelength control in DFB laser arrays by tilting the ridge with respect to the gratings
Author :
Sarangan, A.M. ; Huang, W.-P. ; Makino, T. ; Li, G.P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
Abstract :
Experimental and simulation results on ridge waveguide InGaAsP DFB MQW lasers with tilted stripes with respect to the gratings is presented in this letter. It is shown that in addition to the lasing wavelength, the coupling efficiency (/spl kappa/) is also a strong function of tilt angle. This results in a higher threshold current and a smaller stop-band width, and limits the maximum wavelength tuning range that can be achieved using this scheme.
Keywords :
diffraction gratings; laser theory; laser tuning; optical couplers; optical transmitters; quantum well lasers; ridge waveguides; semiconductor laser arrays; simulation; waveguide lasers; wavelength division multiplexing; DFB laser arrays; InGaAsP; coupling efficiency; higher threshold current; lasing wavelength; maximum wavelength tuning range; ridge waveguide DFB lasers; stop-band width; tilt angle; tilted stripes; wavelength control; Arrayed waveguide gratings; Holography; Laser modes; Laser tuning; Optical arrays; Optical control; Optical coupling; Threshold current; Waveguide lasers; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
