J. A. Arnaud

Quantum Electronics, IEEE Journal of  (Volume:4 ,  Issue: 11 ), pages 893 – 899, Nov 1968

ABSTRACT

The amplification before detection of the carrier of a modulated optical signal by a narrow-band quantum amplifier enhances the signal-to-noise ratio, particularly when the signal wave-front is distorted. A further improvement is obtained by using a combination of wide-band and narrow-band quantum amplifiers. The practical application of these schemes requires a degenerate regenerative ring-type amplifier capable of amplifying arbitrary transverse field configurations. Experiments show that such an amplifier with a gain of 24 dB and a bandwidth of 1 MHz is feasible. The incident beam axis can be displaced by as much as ten times the beam-waist radius without losing more than 4 dB in gain. Frequency modulation may be converted into amplitude modulation by the phase shift introduced in the carrier.

LIEN VERS  L’ARTICLE : ENHANCED OF OPTICAL RECEIVER SENSITIVITIES BY AMPLIFICATION OF THE CARRIER