Light monitoring device
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United States of America Patent
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Issued Date -
Apr 26, 2007
app pub date -
Sep 5, 2006
filing date -
Sep 6, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A monitoring device for monitoring a light beam comprises a filter, first and second photodetectors, and an optical body. The first photodetector is arranged to detect a first portion of the light beam that is transmitted through the filter, and the second photodetector is arranged to detect a second portion of the light beam that is reflected from the filter. At least one of the portions of the light beam is directed to its respective photodetector by total internal reflection within the optical body. The monitoring device may be a wavelength locker.
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