Coutinho, RC;
French, HA;
Selviah, DR;
Wickramasinghe, D;
Griffiths, HD;
(1999)
Detection of coherent light in an incoherent background.
In:
(pp. pp. 247-248).
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Abstract
The change in position of the self-coherence function minimum is used to detect the presence of a coherent source, rather than the change in strength of the self-coherence function at the reference path difference. The system uses both optical and digital signal processing with MATLAB algorithm. An experimental system was built in the visible band, employing a Michelson interferometer, an interference filter centered in the red, and a silicon photodetector. The results were averaged over up to 50 scans, depending on the relative visibility of the white light and laser fringes, to reduce the scan to scan variability. Amplifier gain was introduced to reduce quantization noise.
| Type: | Proceedings paper |
|---|---|
| Title: | Detection of coherent light in an incoherent background |
| Open access status: | An open access version is available from UCL Discovery |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/2670 |
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