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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

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Phase-sensitive amplification via multi-phase-matched four-wave mixing.

Erin M Knutson, J Sam Cross, Sara Wyllie

|August 6, 2020

Summary

This summary is machine-generated.

Researchers developed a new phase-sensitive amplifier using atomic vapor to reduce noise below classical limits. This novel optical amplifier achieves lower intensity noise for specific phase settings.

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Area of Science:

Quantum optics
Nonlinear optics
Atomic physics

Background:

Phase-sensitive amplifiers offer potential for noise reduction beyond classical limits.
Nonlinear gain processes are key to advanced optical amplification.

Purpose of the Study:

To experimentally demonstrate a novel phase-sensitive four-wave mixing amplification process.
To investigate the influence of probe power ratio and frequency on phase sensitivity.

Main Methods:

Utilizing a single atomic vapor cell.
Employing two input frequencies and two input vacuum modes.
Implementing a phase-sensitive four-wave mixing amplification process.

Main Results:

Demonstrated a novel phase-sensitive amplification process.
Showed that phase sensitivity is tunable via probe power ratio and input frequency.
Observed intensity noise reduction below phase-insensitive levels for specific phase values.

Conclusions:

The demonstrated process is a viable method for noise-reduced optical amplification.
This technique has the potential to surpass the classical signal-to-noise ratio limit.
Tunable phase sensitivity offers control over noise reduction in optical amplifiers.