Silica optical fiber pressure sensor for hazardous environments
Innovative silica optical fiber pressure sensor designed for hazardous environments. It leverages high transition temperatures and sensitivity to pressure changes, enhancing refractory concrete manufacturing processes through detailed monitoring and control.
Overview
The silica optical fiber pressure sensor is a cutting-edge solution designed for use in hazardous environments, particularly within the refractory concrete manufacturing industry. This sensor utilizes the unique properties of silica optical fibers, such as high transition temperatures above 1000 degrees Celsius and sensitivity to pressure changes through bend loss and birefringence. The sensor's ability to detect changes in the polarization, frequency, and time signature of an optical signal provides precise monitoring of the manufacturing environment, aiding in the optimization of the casting process.
Technical specifications
The sensor is comprised of a single mode silica optical fiber with a diameter of 125 micrometers, stripped of protective cabling for embedded use. By injecting a laser signal with known characteristics into the fiber, the output signal is altered in response to environmental changes, allowing for detailed pressure mapping. Various fiber devices such as fiber ring loops, Bragg gratings, and tapers can be embedded to enhance sensing capabilities. The technology supports high spatial resolution sensing with OFDR, and data can be transmitted via integrated wireless transceivers for real-time control and monitoring.
Technology readiness level
Currently at TRL 3, this technology is in the experimental phase, with plans to conduct further validation through testing different fiber sensor types and signal modulation techniques in partnership with refractory material suppliers. A one-year preliminary characterization is planned to refine the sensor system for specific industrial applications.
About Queen's University
Queen’s University is a comprehensive public research institution with a large student body and global alumni network based in Kingston, Ontario. For industry, it offers a research and technology park with wet/dry labs, shared core facilities, and collaboration models from sponsored research to contract testing. Clinical translation is enabled by integration with Kingston’s major hospital system, providing governed access to patients, clinicians, and health data. Talent pipelines are built through structured internship programs and project-based engagements. Research is backed by Canada’s Tri‑Council agencies and the Canada Foundation for Innovation, plus provincial and industry support, and a dedicated tech transfer office advances IP, licensing, and startups.
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