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Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
Stabilization of a long-armed fiber-optic single-photon interferometer
1Electronics and Telecommunications Research Institute, Daejeon 305-700, Korea.
Optics Express
|April 8, 2010
Summary
We achieved high-visibility single-photon interference using a stabilized 6-km fiber interferometer. Active phase stabilization maintained 15 nm optical path length stability, crucial for quantum communication applications.
Area of Science:
- Quantum optics
- Fiber optic interferometry
- Quantum communication
Background:
- Long-baseline fiber interferometers are essential for quantum communication.
- Phase fluctuations in long fibers limit interferometer performance.
- Active stabilization is needed to overcome environmental disturbances.
Purpose of the Study:
- To demonstrate single-photon interference in a 6-km fiber Michelson interferometer.
- To implement active phase stabilization for long-fiber interferometers.
- To assess the performance of a stabilized fiber interferometer for quantum experiments.
Main Methods:
- Constructed a Michelson interferometer with two 6-km fiber spools.
- Employed wavelength-division multiplexing for signal and reference light.
- Utilized real-time feedback control for active phase stabilization.
Main Results:
- Achieved phase stability of 0.06 radians.
- Demonstrated optical path length stability of 15 nm between 6-km arms.
- Obtained raw visibility exceeding 98% under stabilized conditions.
Conclusions:
- Active stabilization effectively mitigates phase fluctuations in long-fiber interferometers.
- The stabilized interferometer is suitable for high-visibility single-photon interference experiments.
- This work advances the development of robust quantum communication systems.
