Sub-femtosecond absolute timing precision with a 10 GHz hybrid photonic-microwave oscillator

TL;DR

This paper demonstrates a hybrid photonic-microwave oscillator achieving sub-femtosecond absolute timing precision at 10 GHz by operating near fundamental thermal noise limits, significantly improving signal purity.

Contribution

It introduces an optical-electronic method for generating ultra-pure microwave signals with unprecedented timing stability, surpassing previous noise limitations.

Findings

Achieved 420 attoseconds timing jitter for 10 GHz signals.

Operated near fundamental thermal noise limits.

Demonstrated high spectral purity in microwave generation.

Abstract

We present an optical-electronic approach to generating microwave signals with high spectral purity. By circumventing shot noise and operating near fundamental thermal limits, we demonstrate 10 GHz signals with an absolute timing jitter for a single hybrid oscillator of 420 attoseconds (1Hz - 5 GHz).