title: Noninterferometric phase retrieval using a fractional Fourier system.
abstract: The signal extraction method based on intensity measurements in two close fractional Fourier domains is examined by using the phase space formalism. The fractional order separation has a lower bound and an upper bound that depend on the signal at hand and the noise in the optical system used for measurement. On the basis of a theoretical analysis, it is shown that for a given optical system a judicious choice of fractional order separation requires some a priori knowledge of the signal bandwidth. We also present some experimental results in support of the analysis.
authors.affiliation: School of Electrical and Mechanical Engineering, College of Engineering, Mathematical and Physical Sciences, University College Dublin, Belfield, Dublin 4, Ireland.
authors.forename: Unnikrishnan
authors.initials: U
authors.lastname: Gopinathan
authors.forename: Guohai
authors.initials: G
authors.lastname: Situ
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Naughton
authors.forename: John T
authors.initials: JT
authors.lastname: Sheridan