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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...

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Updated: Jan 4, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

Practical reflective birefringent fiber interferometer sensor.

Hui Li, Yuanhong Yang, Lin Lu

|November 2, 2019

Summary

This summary is machine-generated.

A new fiber optic sensor uses birefringent fibers for dual parameter sensing. It accurately measures temperature and lateral load, with potential for robust field applications.

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Last Updated: Jan 4, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

Area of Science:

Optoelectronics
Fiber optic sensing
Interferometry

Background:

Birefringent fiber sensors offer potential for multi-parameter measurements.
Existing fiber optic sensors may lack robustness or dual-sensing capabilities.

Purpose of the Study:

To propose and demonstrate a simple, practical reflective birefringent fiber interferometer sensor.
To enable simultaneous or selective measurement of temperature and lateral load.
To achieve temperature-insensitive lateral load sensing.

Main Methods:

Constructed a sensor using a polarization beam splitter, polarization-maintaining fiber, and a sensor unit with birefringent fibers and a thin-film reflector.
Applied varying temperatures and lateral loads to the sensor unit.
Employed differential wavelength measurement for temperature-insensitive load detection.

Main Results:

Achieved temperature sensitivity of approximately 0.0010 nm/°C.
Measured lateral load sensitivity of 0.298 nm/N.
Demonstrated temperature-insensitive lateral load measurement by optimizing fiber length and measurement technique.

Conclusions:

The proposed reflective birefringent fiber interferometer sensor is simple, practical, and capable of dual parameter sensing.
The sensor exhibits good performance for temperature and lateral load detection.
The design offers robustness against environmental disturbances, making it suitable for practical field applications.