The polarization competition in vertical-cavity surface-emitting lasers with two nearly degenerate modes is analyzed with the aim of studying their noise properties and, in particular, amplitude fluctuations and spectral linewidth. The coupling between the two modes is attributed to carriers, different spin populations, and structural anisotropies, including the consequences of the electro-optic effect that results from current injection. The model is based on quantum equations of motion with Langevin noise sources. Results for the noise spectra in the regions where mode competition is stronger are reported and discussed.
© 1999 Optical Society of America
(140.5960) Lasers and laser optics : Semiconductor lasers
(230.5590) Optical devices : Quantum-well, -wire and -dot devices
(250.7260) Optoelectronics : Vertical cavity surface emitting lasers
(270.2500) Quantum optics : Fluctuations, relaxations, and noise
(270.6570) Quantum optics : Squeezed states
Gian Paolo Bava, Laura Fratta, and Pierluigi Debernardi, "Quantum noise in vertical-cavity surface-emitting lasers with polarization competition," J. Opt. Soc. Am. B 16, 2147-2157 (1999)