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Refractive index and temperature sensor of photonic crystal fiber, manufacturing method and measuring system

A photonic crystal fiber, refractive index temperature technology, applied in thermometers, measuring devices, measuring heat, etc., can solve the problems of femtosecond lasers increasing the production cost and complexity, limiting the measurement range, etc., so as to improve the detection effect and improve the detection range. The effect of the accuracy

Inactive Publication Date: 2012-11-14
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

However, the use of femtosecond lasers increases the production cost and complexity, and because the long cavity length of 2.3mm limits the measurement range of temperature measurement by direct measurement of wavelength shift

Method used

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  • Refractive index and temperature sensor of photonic crystal fiber, manufacturing method and measuring system
  • Refractive index and temperature sensor of photonic crystal fiber, manufacturing method and measuring system
  • Refractive index and temperature sensor of photonic crystal fiber, manufacturing method and measuring system

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Embodiment Construction

[0031] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0032] Such as Figure 1 to Figure 10 As shown, the photonic crystal fiber refractive index temperature sensor disclosed in the present invention includes an optical signal input and output fiber 2-2 made of a single-mode fiber, a sensor probe 2-3 made of a photonic crystal fiber, and an air cavity 2-5 between the two One end of the optical signal input and output optical fiber 2-2 and one end of the sensor probe 2-3 are coaxially connected by an optical fiber fusion splicer, and the air holes in the cladding of the photonic crystal fiber are collapsed between the optical signal input and output optical fiber and the sensor probe An ellipsoidal air cavity 2-5 is forme...

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Abstract

The invention discloses a refractive index and temperature sensor of a photonic crystal fiber, a manufacturing method and a measuring system. The refractive index and temperature sensor comprises an optical signal input-output fiber made of a single mode fiber, a sensor probe made of a photonic crystal fiber, and an ellipsoid air cavity formed by sunk air holes of a cladding layer of the photonic crystal fiber; and a composite Fabry-Perot cavity is formed by the air cavity and the sensor probe. With the adoption of the refractive index and temperature sensor of the photonic crystal fiber and the measuring system, the fiber does not need to be corroded or photo-etched, so the manufacturing is convenient, a sensor system is free from the affect of stray lights; the refractive index and the temperature are measured synchronously, the signal noise is low, the system sensitivity is high, and the reliability is high.

Description

[0001] technical field [0002] The invention relates to an optical fiber sensor, a manufacturing method and a measuring system thereof, in particular to a photonic crystal optical fiber refractive index temperature sensor, a manufacturing method and a measuring system. Background technique [0003] Refractive index is a basic property of matter, which changes with changes in external temperature, concentration, density, pressure, etc. Therefore, the measurement of refractive index has important practical significance. Traditional measurement methods include Abbe refractometer, laser irradiation method and Young's interferometry. But these traditional refractometers are not suitable for long-distance and small-volume fields. The difference in refractive index between the fiber core and cladding determines the numerical aperture, which affects the loss of the fiber. The numerical aperture of the optical fiber is modulated by temperature, that is, the light-gathering abi...

Claims

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Application Information

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IPC IPC(8): G01K11/32
Inventor 王婷婷王鸣常建华
Owner NANJING UNIV OF INFORMATION SCI & TECH
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