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Updated: Mar 18, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Published on: May 30, 2014

Real-time shot-noise-limited differential photodetection for atomic quantum control.

F Martin Ciurana, G Colangelo, Robert J Sewell

|July 2, 2016

Summary

This summary is machine-generated.

We developed a high-efficiency photodetector for quantum control. This shot-noise-limited system achieves 0.92 quantum efficiency and real-time signal processing for atomic systems.

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Area of Science:

Quantum optics
Atomic physics
Photonics

Background:

Precise measurement of light is crucial for controlling quantum systems.
Existing photodetectors may lack the efficiency or speed required for advanced quantum control applications.

Purpose of the Study:

To demonstrate a high-efficiency, shot-noise-limited differential photodetector.
To enable real-time signal conditioning for feedback-based quantum control of atomic systems.

Main Methods:

Development of a differential photodetector system.
Characterization of quantum efficiency and shot-noise limit.
Implementation of real-time signal conditioning.

Main Results:

Achieved a quantum efficiency of 0.92.
Demonstrated shot-noise-limited performance over a wide dynamic range (7.4×10^5 to 3.7×10^8 photons per pulse).
Provided real-time voltage-encoded output at rates up to 2.3 million pulses per second.

Conclusions:

The developed photodetector system meets the stringent requirements for quantum control.
Its high efficiency, shot-noise-limited operation, and fast real-time processing facilitate advanced feedback mechanisms in atomic quantum systems.