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Detail
Journal Article
Stabilization of a Long-Armed Fiber-Optic Singlephoton Interferometer
- Authors
- Seok Beom Cho, Tae Gon Noh
- Issue Date
- 2009-10
- Citation
- Optics Express, v.17 no.21, pp.19027-19032
- ISSN
- 1094-4087
- Publisher
- Optical Society of America(OSA)
- Language
- English
- Type
- Journal Article
- Project Code
- 09MB2400, Development of key technologies for commercial quantum cryptography communication system, Noh Tae-Gon
- Abstract
- 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 Keywords
- 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)