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Related Experiment Video

Updated: Feb 11, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Using temperature to reduce noise in quantum frequency conversion.

Paulina S Kuo, Jason S Pelc, Carsten Langrock

|May 2, 2018

Summary

This summary is machine-generated.

Lowering the operating temperature of quantum frequency conversion devices significantly reduces noise from spontaneous Raman scattering. This study demonstrates a three-fold reduction in dark count rates by cooling a periodically poled lithium niobate waveguide.

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

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Published on: May 30, 2014

Area of Science:

Quantum optics
Materials science

Background:

Quantum frequency conversion is crucial for quantum networks, enabling communication across different wavelengths.
Spontaneous Raman scattering is a primary noise source in frequency conversion devices.
Lowering operating temperatures can mitigate noise in quantum devices.

Purpose of the Study:

To investigate the impact of temperature reduction on noise in quantum frequency conversion.
To explore the efficiency of converting 1554 nm photons to 837 nm using a 1813 nm pump in a periodically poled lithium niobate waveguide.

Main Methods:

Utilized a periodically poled lithium niobate waveguide for quantum frequency conversion.
Operated the device at temperatures ranging from 85°C down to 40°C.
Measured dark count rates to quantify noise levels.

Main Results:

A three-fold reduction in dark count rates was observed when decreasing the temperature from 85°C to 40°C.
The experimental results showed good agreement with theoretical predictions.
Demonstrated effective noise reduction in quantum frequency conversion through temperature control.

Conclusions:

Temperature reduction is an effective strategy to minimize noise in quantum frequency conversion.
Periodically poled lithium niobate waveguides are suitable for low-noise quantum frequency conversion at reduced temperatures.
Optimizing operating temperature is key for advancing quantum network technologies.