Optical Fiber Temperature Sensor Using Twin-Core Eccentric Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical fiber temperature sensors cannot simultaneously achieve high-resolution and large-dynamic-range measurements while miniaturizing the sensing structure, as they either prioritize sensitivity over dynamic range or vice versa.
Innovation Solution
An optical fiber temperature sensor integrating an inline Mach-Zehnder interference structure and anti-resonance effect using a single-hole twin-core eccentric core optical fiber, combined with fast Fourier filtering and Gaussian fitting to process the optical signal, allowing for high-resolution and large-dynamic-range temperature measurement in a compact form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If special fiber micro-structure devices are used for large-dynamic-range temperature measurement, then the measurement range is improved, but the measurement sensitivity deteriorates
Solution Approach 1:
The patent combines two different measurement mechanisms (inline interference structure for large dynamic range and thermal-sensitive material coating for high sensitivity) into a single integrated sensor system, allowing simultaneous achievement of both large measurement range and high sensitivity
Solution Approach 2:
The patent uses composite structures including thermal-sensitive material coated on the optical fiber sensing structure, combining materials with different properties to achieve both large dynamic range and high measurement sensitivity
2Measurement precision
If thermal-sensitive material is coated on the optical fiber sensing structure for high-resolution measurement, then the measurement sensitivity is improved, but the large-dynamic-range measurement capability deteriorates
Solution Approach 1:
The patent merges the advantages of both measurement approaches by integrating the inline interference structure with thermal-sensitive material coating, enabling the sensor to simultaneously achieve high sensitivity and large measurement dynamic range
3Volume of moving object
If special fiber micro-structure devices are used for miniaturization, then the sensor size is reduced, but the measurement sensitivity deteriorates
Solution Approach 1:
The patent uses thin-film thermal-sensitive material coatings on the optical fiber structure, enabling miniaturization while maintaining or enhancing sensitivity through the surface coating approach rather than bulk structure modifications
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables simultaneous high-resolution and large-dynamic-range temperature measurement with a miniaturized sensor size, offering higher sensitivity and broader temperature range than conventional methods, while maintaining a simple and cost-effective structure.
Implementation Method 1
a broadband light source, used to provide wide-spectrum light
Implementation Method 2
the first fusion splice point, the single-hole twin-core eccentric core optical fiber and the second fusion splice point are sequentially connected to form an inline Mach-Zehnder interference structure and generate an anti-resonance effect in the broad-spectrum light
Implementation Method 3
generate an anti-resonance effect in the broad-spectrum light, wherein impacts of the inline Mach-Zehnder interference structure and the anti-resonance effect on the broad-spectrum light are each related to an ambient temperature
Implementation Method 4
the optical spectrum analyzer determines an ambient temperature of the optical fiber temperature sensor according to the optical signal
Data Source
AI summary
An optical fiber temperature sensor includes a broadband light source, a first optical fiber patch cord, a first single-mode optical fiber, a single-hole twin-core eccentric core optical fiber, a second single-mode optical fiber, a second optical fiber patch cord, and an optical spectrum analyzer.