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Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Electro-optical frequency division and stable microwave synthesis.

Jiang Li¹, Xu Yi¹, Hansuek Lee¹

¹T. J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, CA 91125, USA.

Science (New York, N.Y.)

|July 19, 2014

Summary

This summary is machine-generated.

Researchers demonstrate optical frequency division for stable microwave generation. This electro-optical method uses a tunable oscillator to create dual optical frequency combs, simplifying microwave synthesis and reducing phase noise.

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Area of Science:

Physics
Electrical Engineering
Optics

Background:

Optical frequency combs have advanced timekeeping and microwave signal generation.
Conventional microwave synthesizers rely on specific oscillator and frequency reference configurations.

Purpose of the Study:

To demonstrate a novel method for optical frequency division and microwave generation.
To simplify microwave signal synthesis using an electro-optical approach.

Main Methods:

Utilizing a tunable electrical oscillator to generate dual optical frequency combs via phase modulation.
Employing phase-locked control of the electrical oscillator through optical frequency division.
Transposing the conventional oscillator and frequency reference roles in microwave synthesis.

Main Results:

Achieved stable microwave generation through optical frequency division.
Demonstrated significant phase noise reduction in the oscillator.
Relaxed requirements for highly linear photodetection of comb mode spacing.
Showcased the technique's tunability and scalability for higher division ratios.

Conclusions:

The presented electro-optical method offers a simpler, tunable, and scalable alternative for generating stable microwaves.
This approach effectively reduces phase noise by reconfiguring the oscillator and frequency reference.
The technique has potential applications in advanced timekeeping and communication systems.