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학술지 Stabilization of a Long-Armed Fiber-Optic Singlephoton Interferometer
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저자
조석범, 노태곤
발행일
200910
출처
Optics Express, v.17 no.21, pp.19027-19032
ISSN
1094-4087
출판사
Optical Society of America(OSA)
DOI
https://dx.doi.org/10.1364/OE.17.019027
협약과제
09MB2400, 상용 양자암호통신시스템을 위한 요소 기술 개발, 노태곤
초록
We report on single-photon interference experiments in a Michelson-type interferometer built with two 6-km-long fiber spools, as well as on the active stabilization of the interferometer. A weak coherent light signal was (de-) multiplexed with a strong reference light using wavelength-division multiplexing technique, and real-time feedback control technique was applied for the reference light to actively stabilize the phase fluctuation in the long-armed fiber interferometer. The stabilized interferometer showed phase stability of 0.06 rad, which corresponds to an optical path length fluctuation of 15 nm between the 6-km-long interfering arms. The raw visibility obtained without subtracting noise counts in the single-photon interference experiment was more than 98% for stabilized conditions. ©2009 Optical Society of America.
KSP 제안 키워드
5 nm, Control technique, Fiber Interferometer, Fiber optic, Long fiber, Multiplexing technique, Optical path length, Phase fluctuation, Phase stability, Reference light, Wavelength Division Multiplexing(WDM)