A system and a method of optically measuring at least two different environmental parameters.

The system uses an optical delay component in an optical waveguide to separate unpolarized light pulses into different propagation modes, enabling efficient and cost-effective discrimination of environmental parameters like temperature and strain without complex polarization maintenance.

NL2039377B1Active Publication Date: 2026-07-15PHOTONFIRST IP BV
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Patent Information

Application Number
NL2039377
Authority / Receiving Office
NL · NL
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-12-17
Publication Date
2026-07-15
Estimated Expiration
2044-12-16

AI Technical Summary

Technical Problem

Optical sensing applications using optically reflective sensors in optical waveguides face challenges in discriminating between different physical parameters such as temperature, pressure, and strain, leading to complex and expensive sensing systems.

Method used

A system utilizing an optical delay component in an optical waveguide to separate unpolarized light pulses into different propagation modes, allowing for the discrimination of environmental parameters by measuring the time difference between reflection pulses, without the need for complex polarization maintenance.

Benefits of technology

Enables the simultaneous and cost-effective measurement of two environmental parameters by separating light pulses based on propagation duration, reducing the complexity and cost of the measurement subsystem.

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Abstract

A system and a method for measuring at least two different environmental parameters of at least one optically reflective sensor in an optical waveguide comprising at least two orthogonal propagation modes, the optical waveguide further comprising an optical delay component, wherein the optical delay component defines a different propagation duration for one propagation mode relative to the other propagation mode, the system further comprising a measurement subsystem optically coupled to the optical waveguide, wherein a light emitter is configured to emit an unpolarized light pulse into the optical waveguide through the optical delay component towards the at least one optically reflective sensor, and wherein a light detector is configured for detecting a first reflection pulse and a second reflection pulse reflected by the at least one optically reflective sensor, and wherein a time difference between the first time and the second time relates to the different propagation duration of the at least two orthogonal propagation modes, caused by the optical delay component. Figure 1
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