UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Detection of coherent light in an incoherent background

Coutinho, RC; French, HA; Selviah, DR; Wickramasinghe, D; Griffiths, HD; (1999) Detection of coherent light in an incoherent background. In: (pp. pp. 247-248). Green open access

[img]
Preview
PDF
2670.pdf

Download (212kB)

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 > Provost and Vice Provost Offices
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
Downloads since deposit
455Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item