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1 April 2020 Sequential heterodyne analysis of the spectrum of optical signals
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The possibility of transferring the idea of radio-frequency sequential heterodyne spectrum analysis to the optical range is considered. The similarity of signal processing of the radio and optical ranges by the method of sequential heterodyne analysis is noted. We consider the issue of a panoramic optical local oscillator in the form of a tunable laser, where stochastic phenomena are taken into account in the form of the sum of oscillations with a linear change in the instantaneous frequency and the stochastic component as interference, i.e. the spectrum is considered against the background of the generated interference. In this regard, it is proposed to use the technique of compression of radar signals to reduce the influence of the stochastic component of the oscillations of the laser panoramic local oscillator. It is noted that the main task on the path to realizing the idea put forward is to create a laser panoramic local oscillator with a low level of the stochastic radiation component of a tunable laser.
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O. D. Moskaletz, M. A. Vaganov, and E. P. Suedov "Sequential heterodyne analysis of the spectrum of optical signals", Proc. SPIE 11354, Optical Sensing and Detection VI, 113542Y (1 April 2020);

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