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Updated: Jun 15, 2026
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Note: An ultranarrow bandpass filter system for single-photon experiments in quantum optics.
David Höckel1, Eugen Martin, Oliver Benson
1Nano Optics, Institute of Physics, Humboldt-Universität zu Berlin, Hausvogteiplatz 5-7, 10117 Berlin, Germany. david.hoeckel@physik.hu-berlin.de
The Review of Scientific Instruments
|March 3, 2010
Summary
We developed an ultranarrow bandpass filter for quantum optics experiments. This filter effectively suppresses strong background light, enabling sensitive single-photon measurements in electromagnetically induced transparency experiments.
Area of Science:
- Quantum Optics
- Atomic Physics
Background:
- Single-photon experiments require precise filtering to isolate weak signals.
- Electromagnetically induced transparency (EIT) experiments are sensitive to background light, necessitating high-performance filters.
Purpose of the Study:
- To develop and characterize a combined ultranarrow bandpass filtering setup.
- To enable sensitive single-photon EIT experiments by suppressing strong pump beams.
Main Methods:
- Utilized a multipass planar Fabry-Perot etalon.
- Integrated polarization and spatial filtering techniques.
- Demonstrated the setup with Cesium (Cs) vapor at room temperature.
Main Results:
- Achieved 114 dB pump beam suppression with only 4 dB signal beam attenuation.
- Maintained high transmission (65%) for the signal beam.
- Successfully performed EIT experiments with probe powers in the femtowatt regime.
Conclusions:
- The developed filtering setup is highly effective for single-photon experiments.
- It significantly enhances the feasibility of experiments like single-photon EIT in challenging conditions.
