CN112504973A - Self-referencing optical micro-resonator sensor - Google Patents
Self-referencing optical micro-resonator sensor Download PDFInfo
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- CN112504973A CN112504973A CN202011094301.7A CN202011094301A CN112504973A CN 112504973 A CN112504973 A CN 112504973A CN 202011094301 A CN202011094301 A CN 202011094301A CN 112504973 A CN112504973 A CN 112504973A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 239000013307 optical fiber Substances 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims abstract description 12
- 238000010168 coupling process Methods 0.000 claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 claims abstract description 12
- 238000001228 spectrum Methods 0.000 claims abstract description 12
- 239000004809 Teflon Substances 0.000 claims description 4
- 229920006362 Teflon® Polymers 0.000 claims description 4
- 230000010354 integration Effects 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 2
- 239000012491 analyte Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011806 microball Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0218—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using optical fibers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a self-reference optical micro resonant cavity sensor, which comprises two micro resonant cavities and a tapered optical fiber, wherein the tapered optical fiber is used for conducting optical signals and coupling the optical signals into the two micro resonant cavities; the micro resonant cavity is used for transmitting a detected object to obtain a first detection signal; the other micro resonant cavity is used for transmitting a reference object to obtain a second detection signal; after the second detection signal is subtracted from the first detection signal, the spectrum signal change caused by the detected object can be obtained after the background signal is removed. The sensor has higher integration level, mobility and high signal-to-noise ratio, and can be carried to a place needing to be detected to detect a detected object signal in real time.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a self-reference optical micro resonant cavity sensor for detecting relative changes of physical, biological and chemical quantities.
Background
At present, the common optical micro resonant cavity sensor structure mainly comprises micro-bubble, micro-ball, micro-tube, micro-ring, micro-disk and the like. The prior various optical micro resonant cavity sensors have respective technical defects: (1) the sensor adopts a tapered optical fiber or prism coupling mode to realize the transmission and the transmission of optical signals, the coupling needs to be realized in a specific experimental environment, the structure is greatly influenced by the surrounding environment (temperature, humidity, mechanical vibration and the like), and the noise of the system is large. (2) After the coupling position between the micro resonant cavity and the tapered fiber/prism is fixed, only the relative change of the detected object can be detected, and the change of the signal caused by the detected object can not be detected. (3) The traditional optical micro resonant cavity sensor can only be used in a laboratory, can not be directly moved to other places needing to be used, and does not have real-time property. (4) The resonance spectrum signal generated by the micro resonant cavity is greatly influenced by thermal noise and mechanical vibration, usually additional drift is generated, and for the concentration detection of a trace measured object, the signal-to-noise ratio is low and the signal is not easy to distinguish.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a self-reference optical micro resonant cavity sensor.
The optical fiber coupling structure comprises two micro resonant cavities and a tapered optical fiber, wherein the tapered optical fiber is used for conducting optical signals and coupling the optical signals into the two micro resonant cavities.
The micro resonant cavity is used for transmitting a detected object to obtain a first detection signal;
the other micro resonant cavity is used for transmitting a reference object to obtain a second detection signal;
after the second detection signal is subtracted from the first detection signal, the spectrum signal change caused by the detected object can be obtained after the background signal is removed.
Furthermore, the type of the micro resonant cavity comprises a micro bottle cavity, a micro bubble cavity or a micro tube cavity.
Furthermore, each micro-resonator is vertically coupled to the tapered fiber at 90 °.
Furthermore, a certain distance is kept between the two micro resonant cavities and the two micro resonant cavities do not interfere with each other.
Furthermore, two ends of each micro resonant cavity are respectively connected with a section of Teflon tube for transmitting the detected object.
Furthermore, the sizes and the wall thicknesses of the two micro-resonant cavities are kept consistent as much as possible, so that signal errors caused by the size difference of the micro-resonant cavities are reduced.
The self-reference optical micro resonant cavity sensor provides a reference signal for the traditional optical micro resonant cavity sensor, and effectively avoids the influence of the fluctuation of a light source and the temperature and humidity disturbance of the environment; one micro resonant cavity is used for transmitting an object to be detected, the other micro resonant cavity is used for transmitting a reference object, the resonance spectrum signal of the micro resonant cavity is changed due to the change of the concentration, the type and the like of the object to be detected in one micro resonant cavity, but the reference object in the other micro resonant cavity is not changed, the resonance spectrum signal caused by the change is not changed, the change of the resonance spectrum signal caused by the object to be detected is obtained in real time by subtracting the signal of the object to be detected from the signal of the reference object, and the noise of the system is reduced; through the arrangement of the self-reference micro resonant cavity, the sensor has higher integration level, mobility and high signal-to-noise ratio, and can be carried to a place needing to be detected to detect a detected object signal in real time.
Drawings
FIG. 1 is a schematic diagram of a self-referencing optical microresonator sensor structure according to the present invention;
FIG. 2 is a three-dimensional view of the self-referenced optical microresonator sensor structure of the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
The optical fiber coupling device comprises two micro resonant cavities and a tapered optical fiber, wherein the tapered optical fiber part is used for conducting optical signals and coupling the optical signals into the two micro resonant cavities; one micro resonant cavity is used for transmitting a detected object and detecting a signal, the other micro resonant cavity is used for transmitting a reference object and detecting a background signal, and the types of the micro resonant cavities comprise a micro bottle cavity, a micro bubble cavity and a micro tube cavity; wherein each micro-resonator is vertically coupled with the tapered fiber at 90 degrees. A certain distance is kept between the two micro resonant cavities and the two micro resonant cavities are not interfered with each other.
Furthermore, two ends of the two micro resonant cavities are respectively connected with a section of Teflon tube for transmitting analytes such as gas or liquid.
Furthermore, the size and the wall thickness of the two micro resonant cavities are kept consistent as much as possible, so that signal errors caused by the size difference of the micro resonant cavities are reduced.
Example (b):
as shown in fig. 1, the self-reference optical micro-resonator sensor of the present embodiment includes a micro-resonator 1, a micro-resonator 2, and a tapered fiber 3; after the prepared tapered fiber 3 is placed and fixed on a specific support structure, firstly, vertically coupling the micro resonant cavity 1 with the tapered fiber 3, and fixing the micro resonant cavity 1 to keep the relative position of the micro resonant cavity and the tapered fiber 3 unchanged; then vertically coupling and fixing the micro resonant cavity 2 and the tapered fiber 3 and ensuring that a specific distance is kept between the micro resonant cavity 2 and the micro resonant cavity 1 to avoid mutual interference; on the basis, two ends of the micro resonant cavity 1 and the micro resonant cavity 2 are respectively connected with a Teflon tube for transmitting an analyte, and the preparation of the self-reference optical micro resonant cavity sensor can be completed, as shown in figure 1. FIG. 2 is a three-dimensional view of a completed self-referenced optical microresonator sensor.
As shown in fig. 1, the tapered optical fiber 3 is used for transmitting an optical signal and simultaneously coupling the optical signal into the micro-cavity 1 and the micro-cavity 2; the detected object is introduced into the micro resonant cavity 1, and the change of the corresponding detected object (concentration, variety and the like) and the change comprehensively caused by various factors (temperature, humidity, mechanical vibration and the like) can be obtained by detecting the resonance spectrum change of the micro resonant cavity 1; a reference object is introduced into the micro resonant cavity 2 and is kept unchanged, and corresponding changes of background signals, such as temperature, humidity, mechanical vibration and the like, can be obtained by detecting the changes of the resonance spectrum of the micro resonant cavity 2; the resonance spectrum signal of the micro resonant cavity 2 is subtracted from the resonance spectrum signal of the micro resonant cavity 1, so that the spectrum signal change caused by the detected object after the background signal is removed can be obtained.
Claims (6)
1. The self-reference optical micro resonant cavity sensor comprises two micro resonant cavities and a tapered optical fiber, and is characterized in that:
the tapered optical fiber is used for conducting optical signals and coupling the optical signals into the two micro resonant cavities;
the micro resonant cavity is used for transmitting a detected object to obtain a first detection signal;
the other micro resonant cavity is used for transmitting a reference object to obtain a second detection signal;
after the second detection signal is subtracted from the first detection signal, the spectrum signal change caused by the detected object can be obtained after the background signal is removed.
2. The self-referencing optical microresonator sensor of claim 1, wherein: the micro resonant cavity is of a type comprising a micro bottle cavity, a micro bubble cavity or a micro tube cavity.
3. The self-referencing optical microresonator sensor of claim 1, wherein: each micro resonant cavity is vertically coupled with the tapered optical fiber at 90 degrees.
4. The self-referencing optical microresonator sensor of claim 1, wherein: a certain distance is kept between the two micro resonant cavities and the two micro resonant cavities are not interfered with each other.
5. A self-referencing optical microresonator sensor according to any one of claims 1 to 4, wherein: two ends of each micro resonant cavity are respectively connected with a section of Teflon tube for transmitting the detected object.
6. A self-referencing optical microresonator sensor according to any one of claims 1 to 4, wherein: the sizes and the wall thicknesses of the two micro resonant cavities are kept consistent as much as possible, and the micro resonant cavities are used for reducing signal errors caused by the size difference of the micro resonant cavities.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011094301.7A CN112504973A (en) | 2020-10-14 | 2020-10-14 | Self-referencing optical micro-resonator sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011094301.7A CN112504973A (en) | 2020-10-14 | 2020-10-14 | Self-referencing optical micro-resonator sensor |
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| CN112504973A true CN112504973A (en) | 2021-03-16 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023029A (en) * | 2010-11-22 | 2011-04-20 | 北京理工大学 | Miniature high-sensitivity optical fiber chemical sensor |
| WO2018104938A1 (en) * | 2016-12-05 | 2018-06-14 | Yissum Research Development Company Of The Hebrew University Of Jerusalem Ltd. | A radio-frequency (rf) system and a method thereof |
| CN207571006U (en) * | 2017-12-14 | 2018-07-03 | 苏州联讯仪器有限公司 | It is a kind of that the cascade optical sensor in end is led directly to based on dicyclo resonant cavity |
| CN108414448A (en) * | 2018-05-30 | 2018-08-17 | 苏州联讯仪器有限公司 | One kind being based on the cascade optical sensor of dual resonant cavity |
| CN109631961A (en) * | 2019-01-15 | 2019-04-16 | 中国科学技术大学 | A kind of optical sensor based on double ampuliform micro resonant cavities |
| CN111580025A (en) * | 2020-04-30 | 2020-08-25 | 杭州电子科技大学 | Magnetic field sensing system based on optical double-ring resonant cavity |
-
2020
- 2020-10-14 CN CN202011094301.7A patent/CN112504973A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023029A (en) * | 2010-11-22 | 2011-04-20 | 北京理工大学 | Miniature high-sensitivity optical fiber chemical sensor |
| WO2018104938A1 (en) * | 2016-12-05 | 2018-06-14 | Yissum Research Development Company Of The Hebrew University Of Jerusalem Ltd. | A radio-frequency (rf) system and a method thereof |
| CN207571006U (en) * | 2017-12-14 | 2018-07-03 | 苏州联讯仪器有限公司 | It is a kind of that the cascade optical sensor in end is led directly to based on dicyclo resonant cavity |
| CN108414448A (en) * | 2018-05-30 | 2018-08-17 | 苏州联讯仪器有限公司 | One kind being based on the cascade optical sensor of dual resonant cavity |
| CN109631961A (en) * | 2019-01-15 | 2019-04-16 | 中国科学技术大学 | A kind of optical sensor based on double ampuliform micro resonant cavities |
| CN111580025A (en) * | 2020-04-30 | 2020-08-25 | 杭州电子科技大学 | Magnetic field sensing system based on optical double-ring resonant cavity |
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Application publication date: 20210316 |