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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

3.8K
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...
3.8K
Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

2.0K
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,...
2.0K

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Related Experiment Video

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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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Heterogeneous all-solid multicore fiber based multipath Michelson interferometer for high temperature sensing.

Li Duan, Peng Zhang, Ming Tang

    Optics Express
    |September 9, 2016
    PubMed
    Summary
    This summary is machine-generated.

    A novel high temperature sensor uses a multipath Michelson interferometer (MI) in multicore fiber (MCF) for enhanced sensitivity. This fiber optic sensor achieves 165 pm/°C sensitivity up to 900°C.

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    Area of Science:

    • Fiber optics
    • Optical sensing
    • Interferometry

    Background:

    • High-temperature sensing is crucial for industrial processes and research.
    • Existing sensors often face limitations in sensitivity, stability, or operating range.
    • Multicore fiber (MCF) offers unique properties for advanced optical sensing applications.

    Purpose of the Study:

    • To propose and demonstrate a compact high temperature sensor.
    • To leverage a multipath Michelson interferometer (MI) structure in weak coupling MCF.
    • To achieve enhanced temperature sensitivity and high-quality interference spectra.

    Main Methods:

    • Fabrication of the sensor using program-controlled tapering and arc-fusion splicing between single mode fiber (SMF) and MCF.
    • Formation of a spherical reflective structure at the MCF end face.
    • Theoretical analysis, beam propagation method (BPM) simulation, and experimental validation.

    Main Results:

    • An enhanced temperature sensitivity of 165 pm/°C was achieved up to 900°C.
    • A high-quality interference spectrum with 25 dB fringe visibility was obtained.
    • The sensor demonstrated effective performance benefiting from multipath interferences and MCF's heterogeneous structure.

    Conclusions:

    • The proposed multipath MI sensor based on weak coupling MCF is effective for high temperature measurements.
    • The sensor design offers a promising solution for demanding temperature sensing applications.
    • The results highlight the potential of MCF in developing advanced fiber optic sensors.