Open AccessA method to measure the beat frequency of weak light
Author(s) -
Yanxue Hou,
Haiqiang Ma,
LingAn Wu
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.574
Subject(s) - preamplifier , beat (acoustics) , spectrum analyzer , optics , detector , physics , measure (data warehouse) , acoustics , computer science , optoelectronics , amplifier , cmos , database
A method is proposed for measuring the beat frequency of weak light based on pho ton correlation measurements. In contrast to conventional techniques this method is not limited by the response time of the detector or preamplifier, and can me asure frequencies on the order of 10GHz without the need of a frequency spectrum analyzer. Moreover, extremely low light intensities may be measured.