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Updated: May 1, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Terahertz-Rate Kerr-Microresonator Optical Clockwork.

Tara E Drake¹, Travis C Briles^1,2, Jordan R Stone^1,2

¹Time and Frequency Division, National Institute of Standards and Technology, 385 Broadway, Boulder, Colorado 80305, USA.

Physical Review. X

|January 15, 2025

Summary

This summary is machine-generated.

Researchers developed a novel Kerr-microresonator optical clockwork using silicon nitride. This device achieves unprecedented accuracy for optical clocks, enabling advanced timing experiments and high-performance measurements.

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Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

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Published on: December 15, 2021

Area of Science:

Photonics and Optical Engineering
Quantum Optics
Metrology

Background:

Kerr microresonators utilize nonlinear optics to generate fundamental states of light.
Photonic integration enables low-noise, compact, and power-efficient devices.
Kerr solitons in microresonators produce ultrafast pulse trains and broadband optical frequency combs.

Purpose of the Study:

To introduce a Kerr-microresonator optical clockwork for distributing optical clock signals.
To demonstrate a foundational device for advanced optical metrology.
To explore new possibilities in high-performance optical clock measurements.

Main Methods:

Fabrication of a silicon nitride (Si₃N₄) microresonator.
Generation of a Kerr-soliton frequency comb with a 1 THz repetition frequency.
Electro-optic modulation with microwave signals for measurement and arbitrary frequency comb generation via EO phase modulation.

Main Results:

Characterization of the Kerr-microresonator optical clockwork.
Achieved absolute frequency noise measurement of 1 part in 10¹⁷.
Demonstrated arbitrary generation of CW modes to reduce repetition frequency and enhance comb resolution.

Conclusions:

The developed Kerr-microresonator optical clockwork represents a significant advancement in optical timing technology.
The achieved accuracy and precision open new avenues for measuring high-performance optical clocks.
This technology enables optical-based timing experiments in wideband and high-speed frequency ranges.