Chirped optical heterodyne: A method for real time Fourier processing by coherent detection

Journal Article · Fri Jan 01 00:00:00 EST 1982 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.329951· OSTI ID:5811481

Salzman, J; Schoenberg, A; Katzir, A

A scheme is proposed for coherent detection and real time Fourier processing of optical signals. In this scheme an input signal is photomixed at one photodetector with a variable (chirped) frequency output of a tunable diode last (TDL). Part of the TDL radiation is photomixed at a second photodetector with a fixed frequency output of a stable laser. The electrical signals from the two detectors are convolved by a surface scoustic wave convolver. After proper filtering and envelope detection, the convolver output can be shown to give the power spectrum of the input signal. This scheme may be used for spectroscopy in the infrared.

• Research Organization: Department of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel
• OSTI ID: 5811481
• Journal Information: J. Appl. Phys.; (United States), Vol. 53:1
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
RADIATION DETECTION
FOURIER ANALYSIS
COHERENT RADIATION
DATA
DATA PROCESSING
FILTERS
FOURIER TRANSFORMATION
FREQUENCY CONVERTERS
HETERODYNE RECEIVERS
INFRARED SPECTRA
LASERS
MATHEMATICAL MODELS
OPTICAL EQUIPMENT
PHOTODETECTORS
SIGNALS
SPECTRA
TIME DEPENDENCE
TUNING
DETECTION
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
INFORMATION
INTEGRAL TRANSFORMATIONS
MICROWAVE EQUIPMENT
PROCESSING
RADIATIONS
RADIO EQUIPMENT
TRANSFORMATIONS
440300* - Miscellaneous Instruments- (-1989)