J. Arnaud

Optoelectronics, IEE Proceedings –  (Volume:141 ,  Issue: 1 ), pages 49 – 52, Feb 1994

ABSTRACT

A simple expression for the linewidth of vertical cavity, periodic gain, laser diodes is reported. Quantum wells, spaced half a wavelength apart are assumed to be driven by time-independent electrical currents J k, and to possess distinct phase amplitude coupling factors αk. The usual linewidth formula is found to be applicable if the photon lifetime is defined as the round trip time divided by a factor of 6, and the averaging of the αk is made with Jk as a weighting factor. Furthermore, half the spatial variance of α must be subtracted. The expression involves cross terms of the form αiαj, i≠j

LIEN VERS  L’ARTICLE : LINEWIDTH OF GAIN-COUPLED DISTRIBUTED FEEDBACK LASERS