상세정보
학술지
Stabilization of a Long-Armed Fiber-Optic Singlephoton Interferometer
- 발행일
- 200910
- 출처
- Optics Express, v.17 no.21, pp.19027-19032
- ISSN
- 1094-4087
- 출판사
- Optical Society of America(OSA)
- 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.