Accession Number : ADD017799
Title : Multi-Octave, High Dynamic Range Operation of Low-Biased Modulators by Balanced Detection.
Descriptive Note : Patent Application, Filed 27 Jul 95,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Burns, William N ; Moeller, Robert P ; Gopalakrishnan, Ganesh K
PDF Url : ADD017799
Report Date : 27 Jul 1995
Pagination or Media Count : 32
Abstract : An optical link is disclosed that is operated by a balanced detection technique so as to extend its linear dynamic range, yet substantially eliminate even-order harmonic distortion of the modulated signal. The modulator comprises two parallel arranged Mach Zehnder interferometers that respectively have a steady state DC voltage bias applied so that the operating points of the Mach Zehnder interferometers are selected to produce two separate modulated signals, one of which is later phase shifted by a phase shift device so as to provide an output that is combined with the other modulated signal in such a manner so as to cause a subtraction, leaving the final output signal substantially free of any unwanted even order harmonic components in order to provide for a multioctave response characteristic.
Descriptors : *PATENT APPLICATIONS, *LIGHT MODULATORS, HARMONICS, OPTICAL COMMUNICATIONS, LINEARITY, DATA LINKS, PHASE SHIFT, HIGH DYNAMIC RANGE
Subject Categories : Electrooptical and Optoelectronic Devices
Optical Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE