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Updated: May 10, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Quantum model of light transmission in array waveguide gratings.

J Capmany¹, J Mora, C R Fernández-Pousa

¹ITEAM Research Institute, Universitat Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain. jcapmany@iteam.upv.es

|June 22, 2013

Summary

We introduce the first model for array waveguide gratings (AWGs) with quantum inputs, analyzing single-photon states. Quantum crosstalk in AWGs is negligible below a specific photon number, crucial for integrated quantum photonics.

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Last Updated: May 10, 2026

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Area of Science:

Quantum optics
Integrated photonics
Waveguide devices

Background:

Array waveguide gratings (AWGs) are key components in integrated photonics.
Understanding AWG behavior under quantum conditions is essential for quantum technologies.
Previous models often neglect quantum input effects.

Purpose of the Study:

To develop the first theoretical model for array waveguide gratings (AWGs) with quantum inputs.
To analyze the transformation functionalities of AWGs for single-photon states.
To experimentally characterize a commercial AWG under realistic quantum detection.

Main Methods:

Development of a novel theoretical model for AWGs with quantum inputs.
Experimental characterization using weak input coherent states.
Analysis of quantum crosstalk and dark counts at AWG ports.

Main Results:

The study presents the first model for AWGs operating with quantum inputs.
Demonstration of basic transformation functionalities for single-photon states.
Identification of a cutoff average photon number below which quantum crosstalk is negligible relative to dark counts.

Conclusions:

The developed model provides insights into AWG behavior with quantum inputs.
Experimental validation confirms theoretical predictions under realistic conditions.
These findings are vital for the application of AWGs in integrated quantum photonic systems.