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Updated: Jun 8, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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Quantum-noise-limited interferometric phase measurements.

A J Stevenson, M B Gray, H A Bachor

|September 11, 2010

Summary

This summary is machine-generated.

Two interferometric optical phase measurement schemes achieve quantum-noise-limited sensitivity. One uses direct detection, while the other employs phase modulation to overcome classical noise, enabling highly sensitive electric-field sensing.

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Area of Science:

Quantum optics
Optical metrology
Electric-field sensing

Background:

Interferometric optical phase measurement is crucial for various scientific applications.
Sensitivity is often limited by classical optical noise.
Quantum noise represents the fundamental limit for measurement precision.

Purpose of the Study:

To analyze two distinct schemes for interferometric optical phase measurement.
To achieve measurement sensitivity limited only by quantum noise.
To experimentally validate the performance of these schemes.

Main Methods:

Analysis of direct detection for phase measurement away from technical noise.
Development and analysis of a phase-modulation technique to shift signals into a quantum-noise-limited region.
Experimental validation using a polarimetric electric-field sensor.

Main Results:

Direct detection achieved a phase sensitivity of 0.25 µrad, limited by quantum noise.
The phase-modulation scheme successfully extracted subkilohertz signals from classical noise 67 dB stronger.
The indirect scheme demonstrated sensitivity approaching the quantum noise limit.

Conclusions:

Both analyzed schemes offer pathways to quantum-noise-limited interferometric optical phase measurement.
Phase modulation provides a robust method for recovering signals obscured by significant classical noise.
These techniques enhance the precision of electric-field sensing and related optical measurements.