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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Mid-infrared polarization pulse shaping by parametric transfer.

Marco Thomas Seidel¹, Suxia Yan, Howe-Siang Tan

¹Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences,Nanyang Technological University, Singapore 637371, Singapore.

|February 18, 2010

Summary

Researchers generated tunable mid-infrared (MIR) pulses with controlled amplitude, phase, and polarization. This technique uses shaped near-infrared pulses amplified in nonlinear crystals and recombined interferometrically.

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Area of Science:

Optics and Photonics
Nonlinear Optics
Quantum Optics

Background:

Precise control over optical pulse properties is crucial for advanced applications.
Mid-infrared (MIR) light sources with tailored characteristics are in high demand.

Purpose of the Study:

To demonstrate a novel method for generating MIR pulses with arbitrary control over amplitude, phase, and polarization.
To achieve MIR pulse shaping by transferring properties from shaped near-infrared pulses.

Main Methods:

Utilizing two independent optical parametric amplification (OPA) processes in perpendicularly oriented nonlinear crystals.
Employing a common-path geometry to maintain phase coherence.
Shaping individual pulse profiles in the near-infrared (NIR) before MIR conversion.
Temporally recombining orthogonally polarized MIR fields interferometrically in a birefringent material.

Main Results:

Successful generation of MIR pulses tunable around 3.5 micrometers.
Demonstration of independent control over amplitude, phase, and polarization of the MIR pulses.
Preservation of pulse characteristics from NIR to MIR through the OPA process.

Conclusions:

The presented method offers a versatile platform for generating precisely controlled MIR light.
This technique opens possibilities for advanced spectroscopy, microscopy, and quantum information processing in the MIR region.