title: Circuit theory of multielement laser diodes.
abstract: A general theory of noise and small-signal modulation of multielement laser diodes in the saturated regime is established. Nonlinear elements are connected to the ports of a linear-optical circuit oscillating in a single electromagnetic mode. The laser amplitude and phase fluctuations are expressed simply in terms of the scattering matrix of the linear-optical circuit at any baseband frequency and for an arbitrary electronic feedback. The case of a single laser diode and a single detector is treated to demonstrate this method. The correlation between optical power and electrical voltage fluctuations is shown to disappear at large output powers, in agreement with recent experiments.
authors.forename: J
authors.initials: J
authors.lastname: Arnaud
authors.forename: M
authors.initials: M
authors.lastname: Estéban