Title :
Determination of the Photon Lifetime for DFB Lasers
Author :
Zheng, W. ; Taylor, G.W.
Author_Institution :
Electr. & Comput. Eng. Dept., Connecticut Univ., Storrs, CT
fDate :
4/1/2007 12:00:00 AM
Abstract :
The photon lifetime of the distributed feedback (DFB) laser is obtained through the relations between cavity photon flux and power associated with the electric fields. The solution of the coupled wave equations provides the propagation parameters and the amplitude gain coefficients for which numerical and approximate solutions are obtained. Using the photon lifetime the threshold condition of the DFB laser within a fixed mirror cavity is determined. The evaluation of both Fabry-Peacuterot and DFB modes is shown by the calculation, using two different photon lifetimes, of all modal concentrations, with the Fermi energy as the independent variable. The current density is also evaluated using the Fermi energy and threshold current is identified as the value when the Fermi energy clamps
Keywords :
distributed feedback lasers; fermion systems; laser cavity resonators; laser mirrors; light propagation; quantum well lasers; DFB mode; Fabry-Perot mode; Fermi energy; amplitude gain coefficients; cavity photon flux; coupled wave equations; current density; distributed feedback lasers; fixed mirror cavity; photon lifetime; propagation parameters; quantum-well active layer; Clamps; Current density; Distributed feedback devices; Laser feedback; Laser modes; Mirrors; Optical propagation; Partial differential equations; Power lasers; Threshold current; Distributed feedback (DFB) lasers; phonon lifetime; threshold;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2006.889746
