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Tunable squeezed-light generation from twin beams using an optical-phase feed-forward scheme.

|September 24, 2009

Summary

We demonstrate a novel optical-phase feed-forward technique to generate tunable squeezed light. This method enhances nonclassical intensity noise reduction for precision spectroscopy applications.

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Area of Science:

Quantum Optics
Nonlinear Optics
Laser Physics

Background:

Intensity-correlated twin beams are generated via nondegenerate parametric amplification.
Optical-phase feed-forward is a technique used to manipulate quantum states of light.
Squeezed light exhibits reduced noise below the standard quantum limit.

Purpose of the Study:

To analyze an optical-phase feed-forward scheme for producing squeezed light.
To investigate the relationship between parametric amplifier gain and squeezing factor.
To explore the potential for generating tunable squeezed light for precision spectroscopy.

Main Methods:

Generating intensity-correlated twin beams using nondegenerate parametric amplification.
Implementing an optical-phase feed-forward scheme with an electro-optic phase modulator.

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Performing quadrature measurements on the idler beam and feeding them to the signal beam.

Main Results:

The minimum squeezing factor achievable is determined to be 1/(2g - 1), where g is the parametric amplifier gain.
This squeezing factor equals the nonclassical intensity-noise reduction factor of the twin beams.
The scheme allows for the generation of tunable squeezed light by adjusting the input signal beam frequency.

Conclusions:

The optical-phase feed-forward scheme effectively produces squeezed light from twin beams.
The generated squeezed light is tunable, offering potential applications in precision spectroscopy.
This technique provides a method for enhancing quantum-enhanced measurements.