Proceedings ArticleDOI
Frequency-variant optical systems for signal analysis and processing
W. Rhodes,J. Florence +1 more
- Vol. 1, pp 753-755
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TLDR
Methods for obtaining frequency-variant time and frequency resolution with a coherent optical spectrum analyzer and for displaying signal spectral content vs. arbitrary functions of frequency are described.Abstract:
Coherent optical systems have been employed in many configurations for the spectral analysis of signal waveforms. With some systems, signal time-bandwidth products approach 107, and real time or near real time analysis is now common. We describe here methods for obtaining frequency-variant time and frequency resolution with a coherent optical spectrum analyzer and for displaying signal spectral content vs. arbitrary functions of frequency. These methods greatly enhance the applicability of optical systems to specific spectral analysis problems, A constant proportional bandwidth-log frequency system is considered as an example. Applications to frequency-mapping signal processing are also discussed.read more
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Proceedings ArticleDOI
Frequency-Variant Signal Waveform Processing Using 2-D Optical Processors
TL;DR: A general optical system for processing temporal signal waveforms is described, in which a frequency-variant spectrum analyzer system is used in conjunction with an interferometric optical hetero-dyne processor.
References
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Journal ArticleDOI
Optical data processing and filtering systems
TL;DR: The optical implementation of integral transforms which are of importance to communication theory is discussed; the general problems of optical filter synthesis and multichannel computation and data processing are introduced, followed by a discussion of potential applications.
Journal ArticleDOI
Unequal bandwidth spectral analysis using digital frequency warping
C. Braccini,Alan V. Oppenheim +1 more
TL;DR: The application to unequal bandwidth and vernier spectrum analysis of a technique referred to as digital frequency warping is discussed and a comparison is presented between the bandwidth as a function of frequency for the digital warping technique and proportional bandwidth analysis.
Journal ArticleDOI
Analysis and Synthesis of Optical Images
TL;DR: In this paper, the formation of an optical image by a lens is often treated so that the image appears as the double Fourier transform of the object, limited by the aperture of the lens and other stops.