CN103149629A - Fluorescence fiber grating - Google Patents
Fluorescence fiber grating Download PDFInfo
- Publication number
- CN103149629A CN103149629A CN 201110401818 CN201110401818A CN103149629A CN 103149629 A CN103149629 A CN 103149629A CN 201110401818 CN201110401818 CN 201110401818 CN 201110401818 A CN201110401818 A CN 201110401818A CN 103149629 A CN103149629 A CN 103149629A
- Authority
- CN
- China
- Prior art keywords
- cladding
- covering
- refractive index
- fibre core
- fluorescence
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Glass Compositions (AREA)
Abstract
The invention discloses a fluorescence fiber grating which comprises a fiber core and a cladding which is wrapped on the fiber core, and through refractive index modulation, the refractive index of the cladding is smaller than that of the fiber core. Fluorescence dopant is added into the cladding, and fluorescence dopant does not exist in the areas, away from the fiber core and the interface of the cladding for no more than 5 millimeters, inside the cladding. An inner cladding with the refractive index smaller than that of the fiber core and larger than that of the cladding is further arranged between the fiber core and the cladding. An outer cladding with the refractive index smaller than that of the cladding is arranged on the outer surface of the cladding. The fiber core and the inner cladding are both made of silica-based glass-based material, the silica-based glass material is quartz glass material or quartz glass material into which additives such as germanium dioxide are added, and the cladding is made of transparent high polymer material which is organic glass or transparent fluoralkene material. The fluorescence fiber grating greatly reduces loss of optical wave signals when the optical wave signals are transmitted in the fiber core of the fluorescence fiber grating, and is beneficial to constructing a distributed fiber sensing device.
Description
Technical field
The present invention relates to a kind of fluorescence optical fiber grating.
Background technology
Existing fluorescence optical fiber grating is that fluorescent dopants and index modulation are all at fibre core, due to larger to the attenuated optical signal that transmits in fibre core, only be suitable for the monitoring of single-point or limited amount point, in " experimental study of the fluorescence optical fiber grating photometry characteristic " article in " the photon journal " in September, 2006, just disclosed the characteristic of this fluorescence optical fiber grating, but it is unsuitable for quasi-distributed sensor monitoring use distributed or in a big way.On the other hand, disclosed a kind of fiber grating that sensing is used that is suitable in the master thesis of Southeast China University in 2005 " theoretical research of novel cladding index modulation optical fiber optical grating " literary composition, different from general fiber grating is: the index modulation of this fiber grating is positioned at the covering of optical fiber, and the useless index modulation of fibre core, thereby the loss of can the decrease lightwave signal transmitting in fibre core is suitable for quasi-distributed sensor monitoring distributed or in a big way and uses.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency of the prior art, a kind of fluorescence optical fiber grating is provided.This fluorescence optical fiber grating greatly reduces the loss that lightwave signal transmits in the fibre core of this fluorescence optical fiber grating, this is conducive to build distribution type optical fiber sensing equipment.This fluorescence optical fiber optical grating construction is simple, easy to use, cost is low, has application prospect preferably.
for achieving the above object, the technical solution used in the present invention is: a kind of fluorescence optical fiber grating, it is characterized in that: comprise fibre core and with fibre core parcel and through index modulation and the refractive index covering less than fiber core refractive index, be added with fluorescent dopants in described covering and be not more than the zone of 5 microns without fluorescent dopants apart from fibre core and covering interphase in described covering, also has one deck refractive index between described fibre core and covering less than fiber core refractive index and greater than the inner cladding of cladding index, described covering outside surface is provided with refractive index less than the surrounding layer of cladding index, the material of described fibre core and inner cladding is the silica-based glass-based material, described silica-based glass material is silica glass material or the silica glass material that is added with the adjuvants such as germanium dioxide, described covering is transparent polymer material, described macromolecular material is organic glass or transparent fluoroolefins material.
Above-mentioned a kind of fluorescence optical fiber grating is characterized in that: described silica-based glass material is silica glass material.
Above-mentioned a kind of fluorescence optical fiber grating is characterized in that: described silica-based glass material is the silica glass material that is added with the adjuvants such as germanium dioxide.
The present invention compared with prior art has the following advantages:
When 1, incident optical signal transmits in optical fiber, main energy distribution is at fibre core, but still have a small amount of light signal to be distributed in covering and inspire the fluorescence light wave, when through the reflection wavelength band of the formed grating of covering of index modulation and the wavelength of the fluorescence light signal that described fluorescent dopants is excited to send, overlapping part being arranged, the fluorescence that produces in the formed grating pair covering of covering has strong reflex, and make part fluorescence light wave be coupled into the end of fibre core back light signal incident optical, thereby provide condition for the purpose that realizes distributed monitoring.
2, in described covering, be not more than the zone of 5 microns do not adulterate active fluoro material and index modulation apart from fibre core and covering interphase, only in bending, under the conditions such as little curved or fibre strain, incident light just has partial coupling and enters in covering and inspire the fluorescence light wave, when through the reflection wavelength band of the formed grating of covering of index modulation and the wavelength of the fluorescence light signal that described fluorescent dopants is excited to send, overlapping part being arranged, the fluorescence that produces in the formed grating pair covering of covering has strong reflex, and make part fluorescence light wave be coupled into the end of fibre core back light signal incident optical, thereby for the purpose that realizes distributed monitoring provides condition.
In sum, fluorescence optical fiber optical grating construction of the present invention is simple, cost is low, purposes is wide, can be used for realizing the purpose of distributed or quasi-distributed monitoring sensing, has market outlook preferably.Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is one-piece construction schematic diagram of the present invention.
Description of reference numerals:
The 1-fibre core; The 2-covering; The 3-surrounding layer; The 4-inner cladding; The 5-grating.
Embodiment
a kind of fluorescence optical fiber grating as shown in Figure 1, comprise fibre core 1 and with fibre core 1 parcel and through index modulation and the refractive index covering 2 less than fibre core 1 refractive index, be added with fluorescent dopants in described covering 2 and be not more than the zone of 5 microns without fluorescent dopants apart from fibre core and covering 2 interphases described covering 2 is interior, 2 of described fibre core 1 and coverings also have one deck refractive index less than fibre core 1 refractive index and greater than the inner cladding 4 of covering 2 refractive indexes, described covering 2 outside surfaces are provided with refractive index less than the surrounding layer 3 of covering 2 refractive indexes, the material of described fibre core 1 and inner cladding 4 is the silica-based glass-based material, described silica-based glass material is silica glass material, or be added with the silica glass material of the adjuvants such as germanium dioxide, described covering is transparent polymer material.Described macromolecular material is organic glass or transparent fluoroolefins material.Be added with fluorescent dopants in described covering 2, and the material of covering 2 has passed through index modulation, formation grating 5; Described fibre core 1 is without fluorescent dopants and index modulation.in optical fiber, the lightwave signal overwhelming majority of incident is in the interior transmission of fibre core 1, but have a small amount of lightwave signal in the interior transmission of covering 2, the light wave that enters covering 2 with inspire fluorescence signal after the fluorescent material of doping contacts, and there is the part fluorescence signal to be coupled into the interior transmission of fibre core 1, the detector that this fluorescence signal can be installed in optic fibre end obtains, when the wavelength of the reflection wavelength band of the formed grating 5 of covering 2 that passes through index modulation and the fluorescence light signal that described fluorescent dopants is excited to send has overlapping part, the fluorescence signal of 5 pairs of covering 2 interior generations of the formed grating of covering 2 has strong reflex, and make more part of fluorescence light wave be coupled into the end of fibre core 1 back light signal incident optical, thereby for the purpose that realizes distributed monitoring provides condition.
Preferably, through the reflection wavelength band of the formed grating 5 of covering 2 of index modulation and wavelength at the light signal of the incident of fibre core 1 interior transmission, overlapping part is arranged.More incident optical signal is entered in covering 2.
The above; it is only preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, every according to the technology of the present invention essence to any simple modification, change and equivalent structure transformation that above embodiment does, all still belong in the protection domain of technical solution of the present invention.
Claims (3)
1. fluorescence optical fiber grating, it is characterized in that: comprise fibre core (1) and with fibre core (1) parcel and through index modulation and the refractive index covering (2) less than fibre core (1) refractive index, be added with fluorescent dopants in described covering (2) and be not more than the zone of 5 microns without fluorescent dopants apart from fibre core and covering (2) interphase in described covering (2), also has one deck refractive index between described fibre core (1) and covering (2) less than fibre core (1) refractive index and greater than the inner cladding (4) of covering (2) refractive index, described covering (2) outside surface is provided with refractive index less than the surrounding layer (3) of covering (2) refractive index, the material of described fibre core (1) and inner cladding (4) is the silica-based glass-based material, described silica-based glass material is silica glass material or the silica glass material that is added with the adjuvants such as germanium dioxide, described covering is transparent polymer material, described macromolecular material is organic glass or transparent fluoroolefins material.
2. a kind of fluorescence optical fiber grating according to claim 1, it is characterized in that: described silica-based glass material is silica glass material.
3. a kind of fluorescence optical fiber grating according to claim 1, it is characterized in that: described silica-based glass material is the silica glass material that is added with the adjuvants such as germanium dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110401818 CN103149629A (en) | 2011-12-07 | 2011-12-07 | Fluorescence fiber grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110401818 CN103149629A (en) | 2011-12-07 | 2011-12-07 | Fluorescence fiber grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103149629A true CN103149629A (en) | 2013-06-12 |
Family
ID=48547807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110401818 Pending CN103149629A (en) | 2011-12-07 | 2011-12-07 | Fluorescence fiber grating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103149629A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180866A (en) * | 2017-12-31 | 2018-06-19 | 西北大学 | Fiber grating vector curved-ray tracing device |
| CN112525297A (en) * | 2020-12-23 | 2021-03-19 | 北京航天控制仪器研究所 | Liquid level sensing probe based on fiber bragg grating |
-
2011
- 2011-12-07 CN CN 201110401818 patent/CN103149629A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180866A (en) * | 2017-12-31 | 2018-06-19 | 西北大学 | Fiber grating vector curved-ray tracing device |
| CN112525297A (en) * | 2020-12-23 | 2021-03-19 | 北京航天控制仪器研究所 | Liquid level sensing probe based on fiber bragg grating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6235004B2 (en) | Multimode optical fiber and system including the fiber | |
| CN102904641B (en) | Communication system based on few-mode optical fiber | |
| CN102261967B (en) | Coaxial optical fiber-based temperature and stress dual-parameter optical fiber sensor | |
| CN105425335B (en) | A kind of communication bending resistance multi-core optical fiber | |
| CN205449794U (en) | Based on single mode - centreless - single mode bi -polar dislocation optical fiber measurement liquid refracting index device | |
| KR101731743B1 (en) | Optical fiber with large effective area | |
| CN103988103A (en) | OPTICAL FIBER, OPTICAL TRANSMISSION SYSTEM, AND METHOD OF MAKING the OPTICAL FIBER | |
| CN103605187B (en) | A kind of class double-core photonic crystal fiber tunable optic filter based on selective filling | |
| CN103123405A (en) | Fluorescent optical fiber with graded refractive index cladding | |
| Ujihara et al. | Measurement of large-strain dependence of optical propagation loss in perfluorinated polymer fibers for use in seismic diagnosis | |
| CN101236273B (en) | Single mode and multi-mode cladding mode interference special type optical fibre and method for making same | |
| Amanu | Macro bending losses in single mode step index fiber | |
| CN103149629A (en) | Fluorescence fiber grating | |
| CN108267241B (en) | High-sensitivity optical fiber temperature sensor based on hybrid double peanut knots | |
| CN103123406A (en) | Optical fiber | |
| CN201368927Y (en) | High-polarization maintaining polymer photonic crystal fiber | |
| CN102778723A (en) | Single-mode single-polarization photonic crystal fiber in double triangular arrays of elliptical air holes with short axes being gradually shortened from exterior to interior | |
| CN103135168A (en) | Optical fiber with double fiber cores for sensing | |
| CN201464669U (en) | Interference type fine-core optical fiber wave filter | |
| CN103162866A (en) | Distributed type sensing device based on double-core double-wrapping layer optical fiber | |
| CN103645535B (en) | A kind of high birefringence Hz optical fiber | |
| CN103163588A (en) | Double fiber core plastic optical fiber | |
| CN110426780A (en) | A kind of monomode single-polarization photonic crystal fiber of small sircle hole star-arrangement | |
| EP2529260A1 (en) | Optical fiber | |
| CN101713843A (en) | Low-loss all-solid photonic bandgap fiber with polarization maintaining properties |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130612 |