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Updated: Jun 13, 2026

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

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

Published on: May 30, 2014

Heralded, pure-state single-photon source based on a Potassium Titanyl Phosphate waveguide.

Z H Levine¹, J Fan, J Chen

¹Optical Technology Division, National Institute of Standards and Technology, 100 Bureau Drive, Mail Stop 8441, Gaithersburg, MD 20899-8441, USA. z.levine@nist.gov

|April 15, 2010

Summary

We demonstrate a Potassium Titanyl Phosphate (KTP) waveguide for generating pure-state photon pairs. This source is efficient and heralded, ideal for quantum applications.

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Area of Science:

Quantum optics
Photonics

Background:

Spontaneous parametric down-conversion (SPDC) is a key process for generating quantum light.
Type II SPDC in nonlinear crystals produces photon pairs with specific correlations.

Purpose of the Study:

To analyze the generation of single spatial mode, spectrally uncorrelated photon pairs.
To evaluate a Potassium Titanyl Phosphate (KTP) waveguide as a heralded, pure-state single-photon source.

Main Methods:

Utilizing real experimental parameters for analysis.
Investigating type II spontaneous parametric down-conversion (SPDC).
Employing a Potassium Titanyl Phosphate (KTP) waveguide.

Main Results:

Achieved generation of single spatial mode, spectrally uncorrelated photon pairs.

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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

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Last Updated: Jun 13, 2026

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

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

Published on: May 30, 2014

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Demonstrated the KTP waveguide as an efficient source.

Showcased the heralded nature of the generated single photons.

Conclusions:

The KTP waveguide is a viable platform for efficient heralded single-photon generation.
The source produces pure-state photons suitable for quantum information processing.
Real experimental parameters confirm the source's practical applicability.