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

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Deterministic reshaping of single-photon spectra using cross-phase modulation.

Nobuyuki Matsuda¹

¹NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa 243-0198, Japan.

Science Advances

|April 7, 2016

Summary

This summary is machine-generated.

Researchers achieved lossless and low-noise frequency conversion of single photons using cross-phase modulation in photonic crystal fiber. This breakthrough advances quantum information processing and quantum networks.

Keywords:

Quantum information processing Single photons cross phase modulation nonlinear optics optical fibers quantum entanglement.quantum optics

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Area of Science:

Quantum optics
Nonlinear optics
Photonic technologies

Background:

Frequency conversion is vital for optical technologies like communication and imaging.
In quantum applications, it enables quantum networks and enhanced information processing.
Previous methods for quantum light frequency conversion focused on all-optical frequency mixing, aiming for lossless and noiseless operation.

Purpose of the Study:

To demonstrate a novel route for lossless and low-noise frequency conversion of quantum light.
To utilize cross-phase modulation in a dispersion-managed photonic crystal fiber for this purpose.
To explore the applicability of this method for quantum information processing tasks.

Main Methods:

Employed cross-phase modulation in a dispersion-managed photonic crystal fiber.
Utilized an all-optical and deterministic process for spectral reshaping of single-photon wave packets.
Investigated manipulations of nonclassical frequency correlation, wave packet interference, and photon entanglement.

Main Results:

Achieved lossless and low-noise spectral reshaping of single-photon wave packets in the telecommunication band.
Demonstrated a modulation bandwidth of 0.4 THz.
Successfully applied the scheme to manipulate quantum correlations, interference, and entanglement.

Conclusions:

The cross-phase modulation approach offers a new method for coherent frequency conversion of photons.
This technique is suitable for quantum information processing and building quantum networks.
The demonstrated method provides a low-noise, deterministic pathway for quantum light manipulation.