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Optical Engineering • Open Access

Optical sensor for reducing influence of intensity fluctuations on output stability
Author(s): Vladimir Mendeleyev; Andrei V. Kourilovitch

Paper Abstract

High-precision optical measurements depend on the optical sensor’s stability. Light source’s intensity fluctuations are the dominant cause for output instability of the sensor. In order to address this issue, we have developed an optical sensor for reducing influence of the intensity fluctuations on the output stability. The sensor comprises a light source generating smoothly modulated intensity, a measuring channel, a reference channel, and a beam splitter dividing the light source intensity between the channels. The reference channel opens the measuring channel when the light source intensity equals a specific value and the measuring channel converts the input intensity into the output of the sensor. The sensor was designed and studied experimentally at a wavelength of 635 nm and a modulation frequency of 285 Hz. With the sensor, the influence of the intensity fluctuations on the output stability was reduced 110 times and the relative rms instability of 4.5×10 −5 was obtained. Techniques to achieve the instability of 1.0×10 −5 are also shown.

Paper Details

Date Published: 3 March 2014
PDF: 7 pages
Opt. Eng. 53(2) 027106 doi: 10.1117/1.OE.53.2.027106
Published in: Optical Engineering Volume 53, Issue 2
Show Author Affiliations
Vladimir Mendeleyev, Joint Institute for High Temperatures (Russian Federation)
Andrei V. Kourilovitch, Joint Institute for High Temperatures (Russian Federation)


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