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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

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Published on: August 5, 2013

Stabilized microwave-frequency transfer using optical phase sensing and actuation.

Sascha W Schediwy, David R Gozzard, Simon Stobie

|April 29, 2017

Summary

This summary is machine-generated.

A new technique stabilizes microwave-frequency transfer using optical phase sensing and actuation. This method achieved high stability over 166 km fiber, showing promise for radio astronomy applications.

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Area of Science:

Physics
Optical Engineering
Radio Astronomy

Background:

Accurate microwave-frequency transfer is crucial for scientific applications.
Existing transfer techniques face limitations in stability and distance.
Optical-frequency transfer offers high precision but differs from microwave needs.

Purpose of the Study:

To develop and demonstrate a stabilized microwave-frequency transfer technique.
To leverage optical phase sensing and actuation for improved microwave transfer.
To assess the technique's performance over a long-distance fiber network.

Main Methods:

Utilized optical phase sensing for real-time monitoring.
Employed optical phase actuation for feedback control.
Transferred an 8000 MHz microwave signal over a 166 km metropolitan optical fiber network.

Main Results:

Achieved a fractional frequency stability of 6.8×10^-14 Hz/Hz at 1 s integration.
Reached a fractional frequency stability of 5.0×10^-16 Hz/Hz at 1.6×10⁴ s.
Demonstrated the technique's effectiveness over a significant fiber optic link.

Conclusions:

The presented technique offers advantages over traditional microwave-frequency transfer methods.
This stabilized optical-based approach is suitable for high-precision frequency dissemination.
The technique is a potential candidate for the Square Kilometre Array (SKA1-mid) radio telescope.