Method and apparatus for measuring beat frequency of low light level light source

A method for measuring beat frequency of weak light source light includes dividing attenuated laser into two beams, entering one path to time-amplitude converter through amplifer and another path to it through amplifier and delay line, sending converted signal to multichannel analyser for obtaining...

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Bibliographic Details
Main Authors YANXUE HOU, HAIQIANG MA, LING'AN WU
Format Patent
LanguageEnglish
Published 23.02.2005
Edition7
Subjects
COLORIMETRY
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
PHYSICS
RADIATION PYROMETRY
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
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Summary:A method for measuring beat frequency of weak light source light includes dividing attenuated laser into two beams, entering one path to time-amplitude converter through amplifer and another path to it through amplifier and delay line, sending converted signal to multichannel analyser for obtaining beat frequency data of light source in time domain and obtaining beat frequency of weak light source in frequency domain through figure Fourier analysis.
Bibliography:Application Number: CN2004146006