Signal-processing methods and requirements for continuous-wavelength-encoded optical sensor systems

Douglas R. Patriquin; David H. Crowne

doi:10.1117/12.20979

1 October 1990 Signal-processing methods and requirements for continuous-wavelength-encoded optical sensor systems

Douglas R. Patriquin, David H. Crowne

Proceedings Volume 1291, Optical and Digital Gallium Arsenide Technologies for Signal Processing Applications; (1990) https://doi.org/10.1117/12.20979
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

Abstract

Signal processing requirements and techniques for a class of optical sensors, based on continuous wavelength encoding of sensed data, are discussed. The sensors function as narrow-band transmission filters with the wavelength controlled by the sensed parameter. The signal processor must determine the wavelength of the narrow band peak in real time with an accuracy of at least 0.1 percent of full scale. The electrooptic techniques presently used to detect and process these signals are described along with the associated benefits and limitations. The results from testing these techniques are presented and compared. Several innovative techniques with the potential for reducing the size and weight of the processing elements are proposed. Results from computer simulations of the proposed techniques are presented. Sensor and signal-conditioning multiplexing methods for these sensor systems and the impact on system operation are discussed. An analysis of the signal-processing techniques with respect to throughput, accuracy, cost, weight, and impact on system operation is presented.

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Douglas R. Patriquin and David H. Crowne "Signal-processing methods and requirements for continuous-wavelength-encoded optical sensor systems", Proc. SPIE 1291, Optical and Digital Gallium Arsenide Technologies for Signal Processing Applications, (1 October 1990); https://doi.org/10.1117/12.20979

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KEYWORDS

Sensors

Signal processing

Spectroscopy

Filtering (signal processing)

Optical filters

Signal detection

Electro optics

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