Work

Digital Interferometric Open Loop Phase Recovery in a Fiber Optic Gyroscope

Year: 2025

Type: article

Abstract: We present the first use of a Digitally Enhanced Homodyne readout on a Sagnac interferometer, demonstrating the technique's capability as a readout method for high dynamic range, open loop interferometric fiber optic gyroscopes. We achieve an optical phase noise floor of 0.7$\mu$rad/$\sqrt{\text{Hz}}$, and phase linearity of 8 ppm demonstrated over a phase dynamic range of$16\pi$. We rotation calibrate the system using a rate table, confirming an angular random walk (ARW) of 0.0014 deg/$\sqrt{\text{hr}}$, bias instability of 0.012 deg/hr.

Source: IEEE photonics journal

DOI: 10.1109/jphot.2025.3551278

Authors: Paul G. Sibley, Justin Wong, Malcolm B. Gray, Jong H. Chow, Chathura P. Bandutunga

Institution: Australian National University

Language: English

Topic: Advanced Fiber Optic Sensors

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,075

Funder: Department of Industry, Science, Energy and Resources, Australian Government