CN215374279U - Micro-nano optical fiber interferometer temperature sensor based on nano material packaging - Google Patents
Micro-nano optical fiber interferometer temperature sensor based on nano material packaging Download PDFInfo
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- CN215374279U CN215374279U CN202121222426.3U CN202121222426U CN215374279U CN 215374279 U CN215374279 U CN 215374279U CN 202121222426 U CN202121222426 U CN 202121222426U CN 215374279 U CN215374279 U CN 215374279U
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Abstract
The utility model belongs to the technical field of optical sensors, and particularly relates to a nano-fiber interferometer temperature sensor based on nano-material packaging. The sensing area of the utility model uses the micro-nano optical fiber for sensing, fully utilizes the characteristic that the strong evanescent field of the micro-nano optical fiber is more sensitive to the change of the surrounding environment than other optical fiber structures, and has simple manufacturing process.
Description
Technical Field
The utility model belongs to the technical field of optical sensors, and particularly relates to a micro-nano optical fiber interferometer temperature sensor based on nano material packaging.
Background
Temperature measurement is considered to be an important physical parameter and has important application value in the fields of pharmacy, medical treatment, food storage, meteorology and the like, so that a great deal of research work is devoted to long-term accurate temperature measurement. Many temperature sensors have been developed, wherein optical fiber based temperature sensors have a unique set of advantages, including small size, low cost, good stability in harsh environments, and high sensitivity to measure small temperature changes, which is important for biological and medical diagnostic applications. Due to the continuous progress of the technology, the real minute requirement on the temperature is increased, and therefore, higher requirements are put on the optical fiber temperature sensor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a micro-nano optical fiber interferometer temperature sensor based on nano material packaging aiming at the problems.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the temperature sensor comprises a light source, a micro-nano optical fiber and a spectrometer, wherein the micro-nano optical fiber is manufactured by a photosensitive optical fiber flame melting tapering method, two ends of the micro-nano optical fiber are respectively connected with the light source and the spectrometer, a beam waist uniform area and a transition area of the micro-nano optical fiber are wrapped with a capillary tube, two ends of the capillary tube are provided with ultraviolet glue sealing layers so as to form a sealing space between the micro-nano optical fiber and the capillary tube, and a boron nitride dispersion layer is filled in the sealing space.
Further, the cladding diameter of the photosensitive fiber was 125 μm.
Furthermore, the diameter of the beam waist uniform area in the micro-nano optical fiber is 10-15 μm, and the length is 1-1.5 cm.
Furthermore, the capillary tube is a quartz tube, the length of the capillary tube is 2-2.5cm, and the inner diameter of the capillary tube is 150 mu m.
Further, the light source is an amplified spontaneous emission light source in 1528-1603nm wave band.
Further, the resolution of the spectrometer is 0.03 nm.
Compared with the prior art, the utility model has the following advantages:
1. the sensing area of the utility model uses the micro-nano optical fiber for sensing, fully utilizes the characteristic that the strong evanescent field of the micro-nano optical fiber is more sensitive to the change of the surrounding environment than other optical fiber structures, and has simple manufacturing process;
2. the boron nitride dispersion liquid adopted by the utility model is a nano material, the boron nitride nanosheet is high in thermal conductivity, good in mechanical property, good in optical property and easy to synthesize, the chemical property is stable after the boron nitride nanosheet is prepared into the dispersion liquid, the thermal-optical coefficient is high, and the temperature-sensitive characteristic of the sensor can be improved so as to detect small temperature changes;
3. according to the utility model, the boron nitride is packaged in the capillary tube, so that the sensing area is prevented from being polluted by external impurities when contacting the outside, and the accuracy and stability of the sensor can be improved;
4. compared with the traditional sensor, the utility model has the advantages of strong anti-electromagnetic interference capability, smaller sensor volume and lower manufacturing cost.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a micro-nano optical fiber according to the present invention;
FIG. 3 is a graph showing a temperature change spectrum in the example;
in the figure, a light source-1, a micro-nano optical fiber-2, a spectrometer-3, a capillary-4, an ultraviolet glue sealing layer-5, a boron nitride dispersion liquid layer-6, a beam waist uniform region-201, a transition region 202 and a temperature spectrum interference peak-301.
Detailed Description
In order to further illustrate the technical solution of the present invention, the following examples further illustrate the present invention.
As shown in fig. 1 and 2, a temperature sensor of a micro-nano fiber interferometer based on nano material encapsulation comprises a light source 1, a micro-nano fiber 2 and a spectrometer 3, wherein the light source 1 is an amplified spontaneous emission light source with a wave band of 1528 and 1603nm, the resolution of the spectrometer 3 is 0.03nm, the micro-nano fiber 2 is manufactured by a photosensitive fiber flame melting tapering method, the cladding diameter of the photosensitive fiber is 125 μm, two ends of the micro-nano fiber 2 are respectively connected with the light source 1 and the spectrometer 3, a capillary tube 4 is wrapped in a beam waist uniform region 201 and a transition region 202 of the micro-nano fiber 2, the capillary tube 4 is a quartz tube, the length of the capillary tube 4 is 2-2.5cm, the inner diameter is 150 μm, ultraviolet glue sealing layers 5 are arranged at two ends of the capillary tube 4 to form a sealing space between the micro-nano fiber 2 and the capillary tube 4, the sealed space is filled with a boron nitride dispersion liquid layer 6, and the beam waist uniform area 201 is 10-15 μm in diameter and 1-1.5cm in length.
The micro-nano optical fiber 2 is formed by removing a coating layer from a section of photosensitive optical fiber with the length of about 3-4cm, fixing the photosensitive optical fiber on a tapering platform, heating the middle position of the photosensitive optical fiber by using hydrogen flame, and uniformly tapering the photosensitive optical fiber through a moving platform for about 4s, wherein the diameter of an obtained beam waist uniform area 201 is 10-15 mu m, and the length of lumbar vertebra is 1-1.5 cm. And slowly covering the capillary 4 on the beam waist uniform region 201 and the transition region 202 of the micro-nano optical fiber 2, wherein the length of the capillary 4 is 2-2.5cm, and the inner diameter is 150 mu m.
Because the capillary has the osmosis, so this patent adopts the capillary both ends to drip the mode that solution made its own infiltration and makes the boron nitride dispersion permeate and encapsulate around receiving the optic fibre a little in the capillary, waits that the boron nitride dispersion infiltration stops the transmission, uses ultraviolet glue to seal the capillary both ends after the spectrum no longer changes. When light is transmitted to the lower conical area from the light source, a basic mode and a high-order mode are excited, the basic mode and the high-order mode have optical path difference when being transmitted in the beam waist uniform area, interference can be generated, and the difference value can be changed due to the high thermal optical coefficient of the boron nitride dispersion liquid after the boron nitride dispersion liquid is used for packaging, so that the interference is more obvious. The temperature measurement is that a sensor is placed on a heating plate, a light source is turned on to enable an optical signal to pass through the micro-nano optical fiber, the heating plate is controlled to enable the temperature to rise uniformly, the packaged micro-nano optical fiber can make quick response to the change of the surrounding environment by utilizing evanescent waves, the change rule of the transmission spectrum of the micro-nano optical fiber along with the temperature is observed through an optical spectrum analyzer, a spectrogram of the change of the output temperature is shown in fig. 3, the interference peak moves to short wave along with the increase of the temperature, and the sensitivity slope of the interference peak 301 is-0.288 nm/DEG C respectively.
The principal features and advantages of the utility model patent are shown and described above, it will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A temperature sensor of a micro-nano optical fiber interferometer based on nano material packaging is characterized in that: the optical fiber drawing device is characterized by comprising a light source (1), a micro-nano optical fiber (2) and a spectrometer (3), wherein the micro-nano optical fiber (2) is manufactured by a photosensitive optical fiber flame melting tapering method, two ends of the micro-nano optical fiber (2) are respectively connected with the light source (1) and the spectrometer (3), a beam waist uniform area (201) and a transition area (202) of the micro-nano optical fiber (2) are wrapped by a capillary tube (4), ultraviolet glue sealing layers (5) are arranged at two ends of the capillary tube (4) so as to form a sealing space between the micro-nano optical fiber (2) and the capillary tube (4), and a boron nitride dispersion liquid layer (6) is filled in the sealing space.
2. The temperature sensor of the micro-nano optical fiber interferometer based on nanomaterial encapsulation according to claim 1, wherein: the cladding diameter of the photosensitive fiber was 125 μm.
3. The temperature sensor of the micro-nano optical fiber interferometer based on nanomaterial encapsulation according to claim 1, wherein: the diameter of the beam waist uniform area (201) in the micro-nano optical fiber (2) is 10-15 mu m, and the length is 1-1.5 cm.
4. The temperature sensor of the micro-nano optical fiber interferometer based on nanomaterial encapsulation according to claim 1, wherein: the capillary tube (4) is a quartz tube, the length of the capillary tube (4) is 2-2.5cm, and the inner diameter is 150 mu m.
5. The temperature sensor of the micro-nano optical fiber interferometer based on nanomaterial encapsulation according to claim 1, wherein: the light source (1) is an amplified spontaneous emission light source with 1528-1603nm wave band.
6. The temperature sensor of the micro-nano optical fiber interferometer based on nanomaterial encapsulation according to claim 1, wherein: the resolution of the spectrometer (3) is 0.03 nm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118010670A (en) * | 2024-02-01 | 2024-05-10 | 武汉理工大学 | Infrared micro-nano optical fiber sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118010670A (en) * | 2024-02-01 | 2024-05-10 | 武汉理工大学 | Infrared micro-nano optical fiber sensor |
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