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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
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Complete temporal mode analysis in pulse-pumped fiber-optical parametric amplifier for continuous variable
Optics Express
|December 25, 2015
Summary
Accurate temporal mode matching is crucial for measuring continuous variable entanglement from fiber optical parametric amplifiers. Mismatched modes introduce significant noise, impacting entanglement quality and requiring careful consideration beyond simple loss adjustments.
Area of Science:
- Quantum optics
- Nonlinear optics
- Fiber optics
Background:
- Continuous variable entanglement is vital for quantum information processing.
- Fiber optical parametric amplifiers (FOPAs) generate twin beams for entanglement studies.
- Temporal mode properties in FOPAs are complex and sensitive to dispersion and gain.
Purpose of the Study:
- To investigate the temporal mode structure of twin beams from a FOPA.
- To derive input-output relations for temporal modes.
- To analyze the impact of mode matching on quadrature-amplitude entanglement measurements.
Main Methods:
- Singular-value decomposition of the joint spectral function.
- Analysis of temporal mode decomposition for signal and idler beams.
- Homodyne detection system modeling for entanglement measurement.
Main Results:
- Temporal mode matching is critical for high-fidelity entanglement measurement.
- Non-orthogonal temporal modes contribute noise exceeding vacuum noise.
- Mode mismatch effects are more significant than simple effective loss.
Conclusions:
- Precise temporal mode control is essential for generating high-quality continuous variable entanglement using FOPAs.
- Understanding temporal mode structure is key to optimizing entanglement sources.
- The study provides a framework for improving entanglement measurement fidelity.
