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The measurement of optical spectra using a surface acoustic wave spectrum analyser

C J Oliver

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The author presents a theoretical discussion with experimental comparison of the factors limiting the performance of a surface acoustic wave spectrum analyser plus digital integrator when used with photodetection pulses at the input. It is shown that photodetection-noise-limited operation can normally be achieved in which case the performance is expected to be similar to that attained with a digital autocorrelator. A discussion of the factors which ultimately limit the performance of such a system is included. Finally, examples of actual optical measurements are given demonstrating that the expected performance can indeed be achieved.


PACS

07.50.-e Electrical and electronic instruments and components

43.58.+z Acoustical measurements and instrumentation

85.60.Gz Photodetectors (including infrared and CCD detectors)

42.79.Hp Optical processors, correlators, and modulators

43.60.+d Acoustic signal processing

Subjects

Electronics and devices

Instrumentation and measurement

Optics, quantum optics and lasers

Dates

Issue 18 (21 December 1978)



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