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Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

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Low-noise high-speed InGaAs/InP-based single-photon detector.

Xiuliang Chen¹, E Wu, Guang Wu

¹State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China.

|April 15, 2010

Summary

Researchers developed a low-noise, high-speed single-photon detector using InGaAs/InP. A novel double-self-differencing technique significantly improved signal-to-noise ratio for better photon detection.

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Area of Science:

Photonics and Optoelectronics
Semiconductor Devices

Background:

Single-photon detectors are crucial for quantum information processing and sensitive measurements.
Existing detectors often face challenges with noise and speed, limiting their performance.
Indium Gallium Arsenide/Indium Phosphide (InGaAs/InP) materials offer potential for high-performance detectors.

Purpose of the Study:

To demonstrate a low-noise, high-speed single-photon detector.
To improve the signal-to-noise ratio (SNR) in photon detection.
To achieve high photon-number resolving capabilities.

Main Methods:

Utilized an InGaAs/InP-based single-photon detector.
Implemented a double-self-differencing spike signal cancellation technique.
Employed a photon-number resolving method to analyze avalanche signal to background noise ratio.

Main Results:

Achieved a significant improvement in signal-to-noise ratio by 11.0 dB.
Demonstrated a low typical error count probability of 2.1% at 20.6% detection efficiency.
Showcased a typical error count probability of 6.4% at 30.5% detection efficiency.

Conclusions:

The developed double-self-differencing technique effectively reduces noise in InGaAs/InP single-photon detectors.
The detector exhibits high speed and low noise, suitable for advanced applications.
The photon-number resolving capability with improved SNR enhances detector performance.