title: Improved optical local-oscillator isolation using multiple acousto-optic modulators and frequency diversity.
abstract: A technique is described and experimental evidence presented for obtaining ultrahigh isolation between the optical local oscillator and the transmitter in heterodyne systems. A degree of isolation that results in an equivalent fed-back optical signal that is more than 200 dB below the transmitted power level has been achieved.
authors.affiliation: Department of Applied Physics and Electrical Engineering, Oregon Graduate Center, 19600 N.W. Von Neumann Drive, Beaverton, Oregon 97006-1999, USA.
authors.forename: J F
authors.initials: JF
authors.lastname: Holmes
authors.forename: F
authors.initials: F
authors.lastname: Amzajerdian
authors.forename: J M
authors.initials: JM
authors.lastname: Hunt