Applications of hybrid-optical spectrographic processor

Yuexin Liu; Bo Wang; John Youwei Fu; Ruyan Guo; Francis T. S. Yu

doi:10.1117/12.560533

22 October 2004 Applications of hybrid-optical spectrographic processor

Yuexin Liu, Bo Wang, John Youwei Fu, Ruyan Guo, Francis T. S. Yu

Proceedings Volume 5560, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X; (2004) https://doi.org/10.1117/12.560533
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Optical spectrographic processing systems have been shown to be the most widely used techniques for time-varying signals that usually contain very distinct characteristics in spectral distributions and are difficult to categorize in time (spatial) domain. In this paper, an optical architecture for spectrograph generation, by which time-varying signal processing can be performed, is proposed and its implementation is described in detail. Some potential applications using optical spectrographic processing system in phonetics, linguistics, speech identification are investigated. Simulation results are also presented to demonstrate the effectiveness of the optical spectrographic processing system in those application areas. Other applications of the optical spectrographic analysis system in identifying individuals through "voice prints" or in detecting mechanical fatigue through abnormal noise are also indicated.

Citation Download Citation

Yuexin Liu, Bo Wang, John Youwei Fu, Ruyan Guo, and Francis T. S. Yu "Applications of hybrid-optical spectrographic processor", Proc. SPIE 5560, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X, (22 October 2004); https://doi.org/10.1117/12.560533

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KEYWORDS

Spatial light modulators

Signal processing

Spectrographs

Fourier transforms

Analog electronics

Charge-coupled devices

Modulators

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