CN209387522U - A kind of micro-nano fiber fluorescent optical sensor system based on evanscent field - Google Patents
A kind of micro-nano fiber fluorescent optical sensor system based on evanscent field Download PDFInfo
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- CN209387522U CN209387522U CN201821885292.1U CN201821885292U CN209387522U CN 209387522 U CN209387522 U CN 209387522U CN 201821885292 U CN201821885292 U CN 201821885292U CN 209387522 U CN209387522 U CN 209387522U
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Abstract
A kind of micro-nano fiber fluorescent optical sensor system based on evanscent field, can solve when fluorescence signal that substance issues is faint or distance farther out when, conventional fluorescent fibre optical sensor is difficult to detect the technical issues of substance fluorescence signal leads to not detection.Further include micro-nano fiber including light source, lens, optical fiber, photoelectric converter and computer, lens, optical fiber, micro-nano fiber, optical fiber, photoelectric converter and computer is set gradually after the light source, and be sequentially connected；The utility model optical texture is simple, it is compact, using evanscent field to the principle of the sensitive detection of optical signal, use such micro-nano fiber sensing system based on evanscent field, atomic hypofluorescence signal can be detected, realize that highly sensitive, remote week fluorescent is analyzed in real time.
Description
Technical field
The utility model relates to technical field of optical fiber sensing, and in particular to a kind of micro-nano fiber fluorescence biography based on evanscent field
Sensor system.
Background technique
Detection technique of fluorescence is a kind of common detection technique in biochemistry detection and analysis, which utilizes Cucumber quilt
The characteristic that fluorescence is generated after excitation, carries out qualitative or quantitative analysis.Fluorescence detection has high sensitivity, good selective.
Detection technique of fluorescence is widely used to the fields such as biological detection, biochemical analysis, analytical chemistry.Improve fluorescent type fibre optical sensor
Sensitivity there are mainly two types of mode, one is the intensity for increasing the fluorescence signal generated；Another kind is to improve fluorescence optical fiber to pass
The detection sensitivity of sensor allows to detect fainter fluorescence signal.
Optical evanescent wave sensor be it is a kind of it is highly sensitive, the trace analysis analyzed in real time at a distance can be carried out.Work as light
Can there is a big chunk energy to be transmitted in the form of evanescent wave when transmitting along micro-nano fiber, greatly strengthen light field with
External substance interaction, therefore, micro-nano fiber are suitable as sensitivity member of the monomode optical waveguide for evanescent wave optical sensor
Part.When micro-nano fiber is as fluorescence sense sensing element, the strong evanscent field and external environment substance around optical fiber can be passed through
Interaction, and then the inspection to fluorescence is realized by the variation that the characteristic parameter of probe transmission light directly or indirectly emits
It surveys.To improve detection sensitivity.Water quality monitoring, food hygiene detection, in terms of have huge answer
Use potentiality.
Utility model content
The utility model proposes a kind of micro-nano fiber fluorescent optical sensor system based on evanscent field, can solve when substance send out
Fluorescence signal out is faint or distance farther out when, conventional fluorescent fibre optical sensor, which is difficult to detect substance fluorescence signal, leads
Cause undetectable technical problem.
To achieve the above object, the utility model uses following technical scheme:
A kind of micro-nano fiber fluorescent optical sensor system based on evanscent field, including light source, lens, optical fiber, photoelectric converter
And computer, further include micro-nano fiber, lens, optical fiber, micro-nano fiber, optical fiber, photoelectric converter are set gradually after the light source
And computer, and be sequentially connected.
Further, the lens show to be coated with anti-reflection film.
Further, the light source is the LED light source of single-chip lamp bead.
Further, the optical fiber is G657 single mode optical fiber.
Further, the micro-nano fiber waist cone diameter D is 200nm.
Further, the length of the micro-nano fiber is 35mm.
As shown from the above technical solution, the utility model optical texture is simple, compact, using evanscent field to the quick of optical signal
The principle of sense detection can carry out atomic hypofluorescence signal using such micro-nano fiber sensing system based on evanscent field
Detection realizes that highly sensitive, remote week fluorescent is analyzed in real time.
Detailed description of the invention
Fig. 1 is the structural block diagram of the utility model；
Fig. 2 is the micro-nano fiber structural schematic diagram of the utility model；
In figure, 1- light source, 2- lens, 3- optical fiber, 4- photoelectric converter, 5- computer, 6- micro-nano fiber, 7- pyrometric cone transition
Area, 8- waist cone.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.
As depicted in figs. 1 and 2, the utility model embodiment discloses a kind of micro-nano fiber fluorescent optical sensor based on evanscent field
System, including light source 1, light source 1 is the LED light source of single-chip lamp bead, according to by optical transport and signal detection direction, light source 1
After be followed successively by lens 2, optical fiber 3, lens 2 show to be coated with anti-reflection film, and the optical signal that can more issue light source 1 couples entering light
In fibre, optical fiber 3 is G657 single mode optical fiber.Light is passed in optical fiber 3 by micro-nano fiber 6 in optical fiber 3, then passes through photoelectric converter 4
Pass the signal to computer 5.
The micro-nano fiber 6 is installed in micro-nano fiber protection structural member；
6 both ends of micro-nano fiber are optical fiber 3, and middle position is waist cone 8, and the both ends of waist cone 8 are pyrometric cone transition region 7, this
The micro-nano fiber 6 of embodiment is length about 35mm, waist bores the G657 single mode optical fiber of 8 diameter 200nm.
A kind of preparation method of the micro-nano fiber fluorescent optical sensor system based on evanscent field: including the following steps,
S1 the single mode optical fiber (G657 single mode optical fiber) for) choosing appropriate length, removes surface by optical fiber wire stripper
Coat (length about 2cm or so), and the optical fiber for peelling off coat is suitably impregnated with acetone soln, then wiped repeatedly with alcohol swab
It wipes, the part that optical fiber removes coat is fixed on optical fiber by fiber clamp and is drawn on cone platform.
2) the hydrogen generator power supply for drawing cone platform is opened, igniting waits until flame stabilization.Adjust flame spray head horizontal position
Setting makes it be in coat middle position, adjusts upper-lower height and the optical fiber for removing coat is contacted with the flame envelope of oxyhydrogen flame.
Preheating several minutes makes the optical fiber softening for removing coat.
3) power supply for step-by-step motor is opened, when fibre diameter reaches required diameter (200nm), stepper motor is closed and stops
It only works, and removes flame spray head.
4) micro-nano fiber protection structural member is moved to the micro-nano fiber made using three-dimensional space displacement platform just
Lower section slowly rises micro-nano fiber protection structural member until micro-nano fiber is placed exactly in the mounting hole of micro-nano fiber protection structural member
It is interior.Micro-nano fiber both ends are fixed in micro-nano fiber protection structural member using glue rifle is melted.
The specifically used process of the utility model embodiment are as follows: the light that light source 1 issues enters optical fiber after coupling by lens 2
In 3, the optical transport in optical fiber 3 is into micro-nano fiber 7, and the evanscent field that micro-nano fiber 7 generates changes to ambient light and its sensitivity,
For the optical signal that variation generates by the transmission of optical fiber 3 such as in photoelectric converter 4, the signal of photoelectric converter 4 inputs computer 5 again
In, it is analyzed by computer 5 and shows result.
Above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to aforementioned reality
Example is applied the utility model is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and model of various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (6)
1. a kind of micro-nano fiber fluorescent optical sensor system based on evanscent field, including light source (1), lens (2), optical fiber (3), photoelectricity
Converter (4) and computer (5), it is characterised in that: further include micro-nano fiber (6), set gradually lens after the light source (1)
(2), optical fiber (3), micro-nano fiber (6), optical fiber (3), photoelectric converter (4) and computer (5), and be sequentially connected.
2. the micro-nano fiber fluorescent optical sensor system according to claim 1 based on evanscent field, it is characterised in that: described
Mirror (2) shows to be coated with anti-reflection film.
3. the micro-nano fiber fluorescent optical sensor system according to claim 1 based on evanscent field, it is characterised in that: the light
Source (1) is the LED light source of single-chip lamp bead.
4. the micro-nano fiber fluorescent optical sensor system according to claim 1 based on evanscent field, it is characterised in that: the light
Fine (3) are G657 single mode optical fiber.
5. the micro-nano fiber fluorescent optical sensor system according to claim 1 based on evanscent field, it is characterised in that: described micro-
It is 200nm that nano fiber (6) waist, which bores diameter D,.
6. the micro-nano fiber fluorescent optical sensor system according to claim 1 based on evanscent field, it is characterised in that: described micro-
The length of nano fiber (6) is 35mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821885292.1U CN209387522U (en) | 2018-11-15 | 2018-11-15 | A kind of micro-nano fiber fluorescent optical sensor system based on evanscent field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821885292.1U CN209387522U (en) | 2018-11-15 | 2018-11-15 | A kind of micro-nano fiber fluorescent optical sensor system based on evanscent field |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580562A (en) * | 2018-11-15 | 2019-04-05 | 安徽光纤光缆传输技术研究所(中国电子科技集团公司第八研究所) | A kind of micro-nano fiber fluorescent optical sensor system and preparation method based on evanscent field |
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2018
- 2018-11-15 CN CN201821885292.1U patent/CN209387522U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580562A (en) * | 2018-11-15 | 2019-04-05 | 安徽光纤光缆传输技术研究所(中国电子科技集团公司第八研究所) | A kind of micro-nano fiber fluorescent optical sensor system and preparation method based on evanscent field |
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