CN207020079U - LPFG index sensor and refractivity tester - Google Patents
LPFG index sensor and refractivity tester Download PDFInfo
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- CN207020079U CN207020079U CN201720560037.9U CN201720560037U CN207020079U CN 207020079 U CN207020079 U CN 207020079U CN 201720560037 U CN201720560037 U CN 201720560037U CN 207020079 U CN207020079 U CN 207020079U
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- lpfg
- index sensor
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Abstract
The utility model is applied to fiber optic applications technical field, provide a kind of LPFG index sensor, the index sensor is based on the LPFG for drawing cone method, including La Zhui areas and grating region, grating region is located at the uniform diameter area in La Zhui areas, grating region, which is inscribed, long-period gratings, and grating region surface is coated with zinc-oxide film.Index sensor provided by the utility model, one side is simple in construction, reliability is high；On the other hand, high sensitivity.The utility model additionally provides a kind of refractivity tester, including LPFG index sensor, light source and the spectroanalysis instrument, light source and spectroanalysis instrument are connected to the both ends of LPFG index sensor, index sensor is placed in testing liquid environment during detection, it can be achieved to treat the detection for surveying liquid refractivity by the center wavelength variation for the resonance peak for detecting LPFG index sensor, there is the characteristics of high sensitivity.
Description
Technical field
The utility model belongs to fiber optic applications technical field, more particularly to a kind of LPFG index sensor
And refractivity tester.
Background technology
LPFG has extensive use in various fields, and one of which application is namely based on long period optical fiber light
The index sensor of grid.However, there is many defects in the existing index sensor based on LPFG.Than
Such as, what is had is complicated, and manufacture craft is harsh, it is difficult to realizes extensive industry application；Some sensitivity is not high, can not adapt to height
Sensitive detection environment.
Utility model content
The utility model provides a kind of LPFG index sensor and refractivity tester, it is desirable to provide
A kind of LPFG index sensor simple in construction, high sensitivity.
The utility model provides a kind of LPFG index sensor, the LPFG refraction
Rate sensor includes La Zhui areas and grating region, and the grating region is located at the uniform diameter area in the La Zhui areas, and the grating region is carved
With long-period gratings, and the grating region surface is coated with zinc-oxide film.
Further, the La Zhui areas include Liang Ge Diameter Gradual Changes area, and two Diameter Gradual Change areas are connected to institute
State uniform diameter area both ends.
The utility model additionally provides a kind of refractivity tester, including above-mentioned LPFG refractive index sensing
Device.
Further, the refractivity tester also includes light source and spectroanalysis instrument, the light source and spectrum analysis
Instrument is connected to the both ends of the LPFG index sensor.
Further, the light source and spectroanalysis instrument are connected to the LPFG by single-mode fiber respectively
The both ends of index sensor.
Further, the light source is to be excited spontaneous radiation optical fiber source, Supercontinuum source, tunable laser, scanning
One kind in laser.
Compared with prior art, beneficial effect is the utility model：The utility model provides a kind of long period optical fiber
Grating refractive index sensor and refractivity tester, wherein, index sensor using LPFG as sensing unit,
LPFG is the LPFG by drawing cone processing, and its grating region surface is coated with zinc oxide films
Film, substantially increase refractive index detection sensitivity；Also, the index sensor is simple in construction, reliability is high.Using this practicality
, only need to be by LPFG refractive index when the refractivity tester of new offer carries out refractive index detection to testing liquid
Sensor is placed in testing liquid environment, can be achieved by detecting the center wavelength variation of resonance peak of LPFG
Detection to liquid refractivity to be measured, there is the characteristics of high sensitivity.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram for LPFG index sensor that the utility model embodiment provides；
Fig. 2 is the schematic diagram for one section of general single mode fiber that the utility model embodiment provides；
Fig. 3 is the schematic diagram for the general single mode fiber for divesting part coat that the utility model embodiment provides；
Fig. 4 is the schematic diagram for the general single mode fiber by drawing cone processing that the utility model embodiment provides；
Fig. 5 is the schematic diagram for the LPFG for having inscribed grating that the utility model embodiment provides；
Fig. 6 is a kind of refractivity tester that the utility model embodiment provides.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
The utility model provides a kind of LPFG index sensor, the LPFG refraction
For rate sensor 1 using LPFG as sensing unit, i.e., index sensor provided by the utility model refers to long week
Phase fiber grating, as shown in figure 1, the LPFG index sensor 1 includes La Zhui areas 11 and grating region 12, its
In, the La Zhui areas include a uniform diameter area 111 and Liang Ge Diameter Gradual Changes area 112, and two Diameter Gradual Change areas 112 divide
The both ends of uniform diameter area 111 are not connected to；The grating region 12 is located at the uniform diameter area 111 in the La Zhui areas 11, institute
Stating grating region 12 and inscribing has long-period gratings, and the surface of the grating region 12 is coated with zinc-oxide film.
Further, above-mentioned LPFG index sensor is by writing long period light processed on tapered fiber
Grid, and coat what zinc-oxide film was made thereon.
Lower mask body introduces the manufacturing process of this LPFG index sensor：
Step S1, one section of general single mode fiber is chosen, as optical fiber to be processed；
Specifically, as shown in Fig. 2 the single-mode fiber includes fibre core, covering and coat；Selecting the single-mode fiber
When, too short single-mode fiber should not be selected, otherwise influences the progress of subsequent step.
Step S2, divest the one-step polymerization thing coat in the single-mode fiber；
In particular it is required that the one-step polymerization thing coat in the single-mode fiber is divested completely, for optical fiber surface
Cleaning, it can repeatedly be wiped with alcohol and divest region, be illustrated in figure 3 the signal for the general single mode fiber for divesting part coat
Figure.
Step S3, the optical fiber for divesting coat region is subjected to drawing cone using optical fiber prick-drawing device.
Specifically, it can be heated by oxyhydrogen flame and draw cone mode, CO2Laser heat processing mode carries out optical fiber and draws cone；In addition,
Before carrying out high temperature and drawing cone step, the fibre diameter after boring can be drawn to control by setting prick-drawing device parameter, such as Fig. 4 institutes
It is shown as the schematic diagram of the general single mode fiber by drawing cone processing.
Step S4, write system processed using LPFG and system is write to drawing cone gained optical fiber progress long-period gratings.
Specifically, long-period gratings processed are write at the center in the uniform diameter area of tapered fiber i.e. La Zhui areas, can be with
Using CO2Laser Micro-Machining, the mode of femtosecond laser parallel micromachining write long-period gratings processed in tapered fiber；It is illustrated in figure 5
The schematic diagram of the LPFG of grating is inscribed.
Step S5, using zinc-oxide film coating unit by drawing the grating region of the LPFG of cone processing to enter
The coating of row zinc-oxide film.
Specifically, before step is coated, the oxidation of coating can be controlled by setting the parameter of coating unit
The thickness of zinc film；Hydrothermal growth process, magnetron sputtering method can be used to coat zinc oxide films in the grating region of LPFG
Film, it is as shown in Figure 1 the schematic diagram of the LPFG coated with zinc-oxide film to complete.
LPFG index sensor provided by the utility model, general single mode fiber high temperature is drawn and bored to straight
Footpath is less than general single mode fiber (125 microns of diameter), is then drawing cone region to make LPFG, then by grating
Region coating zinc-oxide film；Compared with traditional LPFG, with by drawing the LPFG of cone processing to make
For index sensor sensing unit, refractive index is used as using the grating region of the LPFG coated with zinc-oxide film
Sensor enhanced sensitivity unit, substantially increase the refractive index sensitivity of LPFG index sensor.
The utility model additionally provides a kind of refractivity tester, as shown in fig. 6, including above-mentioned LPFG
Index sensor 1, in addition to light source 2 and spectroanalysis instrument 3, the light source 1 and spectroanalysis instrument 3 are connected to the length
The both ends of period optical fiber grating index sensor 1.
Specifically, the light source 2 and spectroanalysis instrument 3 are connected to the long period optical fiber light by single-mode fiber 4 respectively
The both ends of grid index sensor 1.
Specifically, the light source 2 for be excited spontaneous radiation optical fiber source, Supercontinuum source, tunable laser, scanning swash
One kind in light device.
When carrying out refractive index detection using above-mentioned refractivity tester, the grating region of index sensor is placed in and treated
Survey in liquid environment, the change realization pair of the centre wavelength of the resonance peak by detecting LPFG index sensor
The detection of extraneous refractive index, there is the characteristics of high sensitivity.In fact, when draw cone operation, tapered fiber is rationally set
Diameter, also, when coating zinc-oxide film, rationally set the thickness of zinc-oxide film further to increase the refraction
The sensitivity of rate sensor.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (6)
- A kind of 1. LPFG index sensor, it is characterised in that the LPFG refractive index sensing Device includes La Zhui areas and grating region, and the grating region is located at the uniform diameter area in the La Zhui areas, and the grating region, which is inscribed, length Periodic optical grating, and the grating region surface is coated with zinc-oxide film.
- 2. index sensor as claimed in claim 1, it is characterised in that the La Zhui areas include Liang Ge Diameter Gradual Changes area, Two Diameter Gradual Change areas are connected to uniform diameter area both ends.
- 3. a kind of refractivity tester, it is characterised in that rolled over including LPFG as claimed in claim 1 or 2 Penetrate rate sensor.
- 4. refractivity tester as claimed in claim 3, it is characterised in that the refractivity tester also includes light source And spectroanalysis instrument, the light source and spectroanalysis instrument are connected to the two of the LPFG index sensor End.
- 5. refractivity tester as claimed in claim 4, it is characterised in that the light source and spectroanalysis instrument pass through respectively Single-mode fiber is connected to the both ends of the LPFG index sensor.
- 6. refractivity tester as claimed in claim 4, it is characterised in that the light source is to be excited spontaneous radiation optical fiber light One kind in source, Supercontinuum source, tunable laser, scan laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720560037.9U CN207020079U (en) | 2017-05-19 | 2017-05-19 | LPFG index sensor and refractivity tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720560037.9U CN207020079U (en) | 2017-05-19 | 2017-05-19 | LPFG index sensor and refractivity tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207020079U true CN207020079U (en) | 2018-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720560037.9U Expired - Fee Related CN207020079U (en) | 2017-05-19 | 2017-05-19 | LPFG index sensor and refractivity tester |
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| CN (1) | CN207020079U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768525A (en) * | 2016-12-01 | 2017-05-31 | 南京大学 | Based on the unstable long-period grating sensor of Rayleigh and its preparation and measurement method |
| CN109709074A (en) * | 2019-01-21 | 2019-05-03 | 哈尔滨理工大学 | Optical fiber ammonia gas sensor and production method based on Ag doping zinc oxide nanometer flower |
| CN111157490A (en) * | 2020-01-08 | 2020-05-15 | 暨南大学 | Micro-nano optical fiber long-period grating refractive index sensor |
| CN113390816A (en) * | 2021-06-16 | 2021-09-14 | 西北大学 | Method for detecting heavy metal ions of polydopamine-graphene oxide coated fiber bragg grating |
| CN113916831A (en) * | 2021-11-15 | 2022-01-11 | 西安邮电大学 | CO based on micro-conical long-period grating2Gas concentration detection method |
-
2017
- 2017-05-19 CN CN201720560037.9U patent/CN207020079U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768525A (en) * | 2016-12-01 | 2017-05-31 | 南京大学 | Based on the unstable long-period grating sensor of Rayleigh and its preparation and measurement method |
| CN109709074A (en) * | 2019-01-21 | 2019-05-03 | 哈尔滨理工大学 | Optical fiber ammonia gas sensor and production method based on Ag doping zinc oxide nanometer flower |
| CN111157490A (en) * | 2020-01-08 | 2020-05-15 | 暨南大学 | Micro-nano optical fiber long-period grating refractive index sensor |
| CN113390816A (en) * | 2021-06-16 | 2021-09-14 | 西北大学 | Method for detecting heavy metal ions of polydopamine-graphene oxide coated fiber bragg grating |
| CN113916831A (en) * | 2021-11-15 | 2022-01-11 | 西安邮电大学 | CO based on micro-conical long-period grating2Gas concentration detection method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180216 Termination date: 20200519 |
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| CF01 | Termination of patent right due to non-payment of annual fee |