Title :
Effective linewidth enhancement factor and spontaneous emission rate of DFB lasers with gain coupling
Author :
Pan, X. ; Tromborg, B. ; Olesen, H. ; Lassen, H.E.
Author_Institution :
TFL Telecommun. Res. Lab., Horsholm, Denmark
Abstract :
A field rate equation governing the noise and dynamic properties of a DFB (distributed feedback) laser with gain coupling is presented. Analytic expressions for the effective linewidth enhancement factor and spontaneous emission rate are derived. It is shown numerically that the linewidth contribution from spontaneous emission can be substantially reduced in DFB lasers with gain coupling.<>
Keywords :
distributed feedback lasers; laser theory; semiconductor device noise; semiconductor lasers; spectral line breadth; DFB lasers; LDs; distributed feedback; dynamic properties; effective linewidth enhancement factor; field rate equation; gain coupling; laser diodes; noise; spontaneous emission rate; Councils; Equations; Laboratories; Laser modes; Laser noise; Laser theory; Optical coupling; Spontaneous emission; Telecommunications; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
