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Related Concept Videos

Temperature Measurement Sites

Temperature Measurement Sites

A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...

Equipments Used to Measure Body Temperature

Equipments Used to Measure Body Temperature

Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...

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Related Experiment Video

Updated: Nov 12, 2025

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

Ultrasensitive temperature sensor with Vernier-effect improved fiber Michelson interferometer.

Yuanfang Zhao, Maolin Dai, Zhenmin Chen

|March 17, 2021

Summary

This summary is machine-generated.

This study introduces a novel fiber optic sensor for precise temperature measurement. Utilizing parallel dual polarization maintaining fiber Sagnac interferometers (PMF-SIs) and the Vernier effect, it significantly enhances temperature sensitivity and resolution.

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Last Updated: Nov 12, 2025

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

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Area of Science:

Optics and Photonics
Fiber Optic Sensing
Interferometry

Background:

Fiber optic sensors offer advantages in harsh environments.
Accurate temperature sensing is critical in various industrial and scientific applications.
Existing fiber interferometers have limitations in sensitivity and resolution.

Purpose of the Study:

To propose and demonstrate a novel fiber Michelson interferometer (FMI) for enhanced temperature sensing.
To leverage parallel dual polarization maintaining fiber Sagnac interferometers (PMF-SIs) for improved sensor performance.
To investigate the application of the Vernier effect for magnifying temperature sensitivity.

Main Methods:

Fabrication of a fiber Michelson interferometer (FMI) using parallel dual polarization maintaining fiber Sagnac interferometers (PMF-SIs).
Experimental demonstration of temperature sensing capabilities.
Optimization of the free spectral range (FSR) difference between the dual PMF-SIs to enhance the Vernier effect.
Characterization of temperature sensitivity and resolution.

Main Results:

The proposed sensor achieved a significantly enhanced temperature sensitivity of 78.984 nm/°C, a 47.99-fold improvement over a single PMF-SI (-1.646 nm/°C).
The temperature resolution was improved from ±0.03037°C to ±0.00063°C.
The free spectral range (FSR) difference of the dual PMF-SIs was identified as the key factor for envelope FSR and sensor sensitivity.

Conclusions:

The novel FMI based on parallel dual PMF-SIs offers ultrasensitive temperature measurement.
The sensor design is characterized by easy fabrication, low cost, and simple configuration.
This technology is suitable for applications demanding high-precision temperature monitoring.