Multispectral Energy/Power Meter For Laser Sources
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United States of America Patent
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Issued Date -
Dec 14, 2006
app pub date -
Jun 9, 2006
filing date -
Jun 10, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A device for measuring optical power simultaneously for two or more spectral regions. Two or more photodetectors, such as photodiodes, measure the pulse energy and/or power emitted by a laser having output in two or more spectral regions. The laser radiation is transmitted through a diffuser or beamsplitter, then filtered and/or attenuated so that light from each respective spectral region is incident on the active region of a photodiode. The device also includes electronic circuitry with one or more operational amplifiers for each photodiode, integrators and analog-to-digital converters. In a preferred embodiment, the device also includes a microprocessor to provide noise reduction and calibration functions for each photodiode output, and to drive a display or readout.
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