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Fiber Bragg Grating Sensor Patent

Fiber and communications infrastructure knowledge brief Published 22 Aug 2025

Prepared for preliminary research by the ROGER FIBRE knowledge desk. Confirm optical interfaces, port or core capacity, electrical input and output, enclosure protection, thermal design and installation limits against current standards and product documentation.

Recent patents related to fiber Bragg grating (FBG) sensors focus on innovative methods for fabrication, applications in strain sensing, and advancements in sensitivity to external fields.

Key Patents and Innovations

Method for Inscribing Fiber Bragg Gratings: A recent patent (US20230194775A1) describes a method for inscribing a Bragg grating in an optical waveguide using femtosecond pulse duration lasers. This method allows for precise control over the grating structure, enhancing the performance of FBG sensors in temperature and strain measurements. Optical Fiber Strain Sensor: Another patent outlines an optical fiber strain sensor that incorporates multiple FBGs.

This design enables the measurement of strain by analyzing the peak reflection wavelengths of the gratings, which change in response to applied forces. This method improves the accuracy of strain measurements and allows for temperature compensation.

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G Sensitive to Magnetic Fields: A notable innovation from NASA involves an FBG that is sensitive to external magnetic fields. This technology utilizes ferromagnetic nanoparticles to directly couple the external field to the optical behavior of the fiber, allowing for the detection and mapping of magnetic fields without relying on mechanical changes.

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G Sensor Structure: A patent describes a fiber Bragg grating sensor structure that includes an optical fiber portion with at least one FBG. This structure is designed to transfer vibrations and strain, making it suitable for various applications, including structural health monitoring and environmental sensing. Applications of Fiber Bragg Grating SensorsFBG sensors are widely used in various fields due to their high sensitivity, immunity to electromagnetic interference, and ability to perform quasi-distributed measurements.

They are particularly valuable in: Structural Health Monitoring: Monitoring the integrity of bridges, buildings, and other infrastructures. Aerospace Applications: Used for measuring strain and temperature in aircraft and spacecraft components. Environmental Monitoring: Tracking changes in environmental conditions, such as temperature and pressure.

These patents and innovations highlight the ongoing advancements in fiber Bragg grating sensor technology, emphasizing their versatility and effectiveness in various sensing applications.

Fiber Bragg Grating Sensor Patent - ROGER FIBRE ATELIER [PDF]

Fiber Bragg Grating Sensor Patent

WO2022119446A1

a Fiber-Bragg gratingis a periodic modulation of the refractive index of the core of an optical fiber along the propagation direction in a certain segment. This periodic modulation may create...

MULTI-AXIS FIBER BRAGG GRATING SENSORS AND SYSTEMS

An interrogator captures and measures wavelength data from the fiber Bragg gratings for measuring multi-axis force information applied to each of the three dimensional multi-axis sensing towers.

Fiber Bragg grating sensor

In accordance with a first aspect of the present invention there is provided a method of strain sensing comprising the steps of providing an optical fiber having at least a first fiber Bragg

Fiber Bragg Grating Sensors: Design, Applications, and

Fiber Bragg grating (FBG) sensors have emerged as advanced tools for monitoring a wide range of physical parameters in various fields, including structural health, aerospace, biochemical,

Fiber bragg grating sensor patented technology retrieval search

This page includes the patent name, patent number, legal status, invention/applicant, technical efficacy and accompanying drawings of Fiber bragg grating sensor-related invention patents and utility model

WO/2025/022137 FBG SENSOR INTERROGATION SYSTEM

The invention proposes an interrogation system for optical fiber sensors of the FBG (Fiber Bragg Grating) type. The system is based on a ring topology fiber laser that includes each FBG sensor as

WO/2025/125838 VCSEL BASED FIBER BRAGG GRATING

WO2025125838 - VCSEL BASED FIBER BRAGG GRATING INTERROGATOR. In the present disclosure an apparatus for the full spectral and temporal interrogation (measurement) of

Sensing Magnetic Fields | T2 Portal

The innovation leverages Armstrong''s cutting edge work in this area, including its patented FBG interrogation system, which allows for a diverse set of engineering measurements in a single

FBG sensor patent landscape 2026: key tech clusters

NEC Corporation''s 2026-dated patent on continuous distal-end position monitoring enables autonomous detection of fiber fracture in deployed sensing infrastructure, signalling a move

Fiber Optic Shape Sensors: A comprehensive review

Chen and Sirkis filed a patent (1998) describing a fiber optic system able to produce multiple strain measurements along one fiber path for determining the shape of a flexible body, by

Fiber Bragg Gratings – Buyer''s Guide & Suppliers

This buyer''s guide for fiber Bragg gratings provides technical background, comparison of major types, selection criteria, and an overview of suppliers.

Structural health and usage monitoring of an unmanned

Kressel I, Shapira O, Mashiach N, et al. Structural health monitoring of composite-based UAVs using simulta-neous fiber-optic interrogation by fiber Bragg grating point sensors and Rayleigh-based

Review of Optical Fiber Sensors: Principles, Classifications and

The results reveal leading trends in the use of techniques like the use of fiber Bragg gratings (FBG) and distributed sensing in high-accuracy conditions or the rising role of extrinsic

(PDF) Fiber Grating Sensors

PDF | We review the recent developments in the area of optical fiber grating sensors, including quasi-distributed strain sensing using Bragg gratings,... | Find, read and cite all the

Measurement of Corrosion and Temperature Using a Single-Pitch Bragg

Abstract A new method to measure metal corrosion using a single-pitch Bragg grating sensor is presented. The prestrained Bragg grating that is only partially coated with a metal can be designed

Wide-range liquid level sensor based on symmetric chirped long

Compared with traditional long-period fiber gratings (LPFGs), the proposed SC-LPFG-based liquid level sensor realizes liquid level-temperature decoupling, with a wider measurement range and enhanced

Non-Invasive IOP Monitoring with Fiber Bragg Grating Contact Lens

The present work shows the design and fabrication of a non-invasive Fiber Bragg Grating (FBG) based contact lens for continuous IOP monitoring.

MZI-SPR fiber optic strain sensor with in-situ

Abstract Fiber optic strain and temperature sensors have important application value in fields such as petrochemicals and in-situ monitoring of batteries. This article proposes a Mach

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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