Dual-Wavelength $\phi$-OFDR Using a Hybrid-Integrated Laser Stabilized to an Integrated SiN Coil Resonator

TL;DR

This paper demonstrates a dual-wavelength distributed acoustic sensing system over 37 km of fiber, using a hybrid-integrated laser stabilized to an integrated SiN coil resonator, enabling scalable and precise measurements.

Contribution

It introduces a novel dual-wavelength laser stabilized with a high-Q SiN resonator for distributed acoustic sensing, enhancing scalability and stability.

Findings

Successful 37 km distributed acoustic sensing using dual-wavelength $$-OFDR

Stable dual-wavelength laser achieved via SiN coil resonator stabilization

Potential for scalable and integrated fiber sensing systems

Abstract

We demonstrate dual-wavelength distributed acoustic sensing over 37 km of standard single-mode fiber using $\phi$-OFDR, utilizing a scalable hybrid-integrated dual-wavelength laser chip frequency-locked to a high-Q integrated SiN coil resonator.