Interferometric analog-to-digital conversion scheme

A novel interferometric analog-to-digital converter (ADC) scheme for real-time conversion at multiple-gigahertz bandwidth is presented and theoretically analyzed. The input analog signal is applied as an optical phase modulation in one of the arms of a Mach-Zehnder interferometer and the digital out...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 17; no. 2; pp. 468 - 470
Main Authors Stigwall, J., Galt, S.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.02.2005
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Analog to digital conversion
Analog-digital conversion
Arm
Bandwidth
Comparators
Conversion
Digital
electrooptical modulation
error correction coding
High speed optical techniques
Mach-Zehnder interferometers
Marketing
Optical interferometry
Optical modulation
Optical signal processing
Phase modulation
Phased arrays
photonic analog-to-digital converter (ADC)
photonic sampling
Probes
Real time
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Summary:A novel interferometric analog-to-digital converter (ADC) scheme for real-time conversion at multiple-gigahertz bandwidth is presented and theoretically analyzed. The input analog signal is applied as an optical phase modulation in one of the arms of a Mach-Zehnder interferometer and the digital output is obtained in encoded form as a set of optical intensities in the interference pattern. Particular benefits of the proposed device are its simple design which facilitates integration, the extremely high bandwidth, and the inherent 2/spl pi/-periodicity that in comparison with conventional flash ADCs relaxes the demands on the comparators and allows unwrapping of the output for higher resolution.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2004.839452