The Open Optics Journal

2013, 7 : 1-4
Published online 2013 March 22. DOI: 10.2174/1874328501307010001
Publisher ID: TOOPTSJ-7-1

A Paradox about the Analytic Signal of Laser Beams

B. Lacaze
TeSA 14/16 Port St-Etienne 31000, Toulouse, France.

ABSTRACT

In the signal theory framework the “analytic signal” is a particular polar representation of a signal ƒ(t). It defines an envelope (a modulus) and a phase (an argument) and these parameters are basic in communications. In this paper, we show that amplitude demodulations generally change envelopes and reduced phases. Consequently we show that recent results in laser communications about these parameters are erroneous.

Keywords:

Analytic signal, laser propagation, envelope.