Jacques Arnaud

Electronics Letters, Volume 25, Issue 1, 5 January 1989, p. 1 – 2

ABSTRACT

It is generally believed that the amplitude fluctuations of a light beam initially in the coherent state cannot be squeezed below those of shot noise by the simple arrangement of a beamsplitter and a detector, the current from the detector being fed back to the light source or to a modulator. A simple semiclassical theory shows that arbitrary amounts of squeezing can in fact be obtained if a negative opticalconductance device such as a constant-voltage-driven (nonself-oscillating) laser diode is used in place of a conventional detector.

LIEN VERS  L’ARTICLE : PROPOSAL FOR GENERATION OF AMPLITUDE-SQUEEZED LIGHT (ASL) FROM LASER DIODES WITH ELECTRONIC FEEDBACK

Jacques Arnaud

Europhysics Letters, 8 (4), pp. 345-349, 1989

ABSTRACT

The amplitude noise of a laser diode submitted to electronic feedback is evaluated using a new circuit theory. It is postulated that the electron-hole injection rate equals the photon generation rate at any time, and Nyquist-like noise sources are introduced. Previous results based on quantum mehcanics are recovered. It is found that the amplitude fluctuations of an optical beam in the coherent state can be squeezed below shot noise by feeding back the driving current of a laser amplifier.

LIEN VERS  L’ARTICLE : CIRCUIT THEORY OF AMPLITUDE NOISE FOR A LASER DIODE WITH ELECTRONIC FEEDBACK