CN208689305U - Adjustable optic fibre polarizer - Google Patents
Adjustable optic fibre polarizer Download PDFInfo
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- CN208689305U CN208689305U CN201821402399.6U CN201821402399U CN208689305U CN 208689305 U CN208689305 U CN 208689305U CN 201821402399 U CN201821402399 U CN 201821402399U CN 208689305 U CN208689305 U CN 208689305U
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- optical fiber
- magnetic
- closed container
- electromagnet
- polarizer
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- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The utility model discloses a kind of adjustable optic fibre polarizer, belong to fiber optic passive device technical field, including fibre optic polarizer ontology, fibre optic polarizer ontology includes: closed container, D-type optical fiber and field generator for magnetic, magnetic fluid is distributed with inside closed container, D-type optical fiber is arranged in closed container, and it is dipped into magnetic fluid, the left and right ends of D-type optical fiber, which are respectively equipped with, imports optical fiber and export optical fiber, it imports optical fiber and exports the outside that optical fiber is located at closed container, field generator for magnetic is located at the outside of closed container, for generating the magnetic induction line for being parallel to D-type optical fiber rubbing down face, design a kind of adjustable optic fibre polarizer, by adjusting modulation of the magnetic field strength realization to the degree of polarization of light, only need a system, it can complete the function that traditional fiber polarizer combines realization with optical fiber polarization controller；Solves the problem in the prior art.
Description
Technical field
The utility model relates to a kind of fibre optic polarizer, in particular to a kind of adjustable fibre optic polarizer of degree of polarization belongs to
Fiber optic passive device technical field.
Background technique
Early in 1980, German W.Eickhoff was just proposed, is carried out side rubbing down to single mode optical fiber and is made D-type optical fiber,
Then metal film production fibre optic polarizer is coated in D-type optical fiber rubbing down face.Since D-type optical fiber is by near rubbing down to fibre core, so
Light field in fibre core leaks to metal film in the form of evanescent wave, wherein TM0The direction of vibration of mould is parallel to metal film, TE0Mould
Direction of vibration perpendicular to metal film.Due to the absorption of metal film, so that TM0The loss of mould is greater than TE0Mould realizes polarizing effect
Fruit.After this, by being set to D-type optical fiber rubbing down face, a variety of optical fiber polarisations indium film, birefringent material, graphene film etc.
Device is developed, they show good performance.However, only having and fixing for any one of these polarizers
Degree of polarization, and degree of polarization cannot arbitrarily be adjusted.
In fiber optic communication, fiber optic sensing applications, traditional fibre optic polarizer must cooperate with optical fiber polarization controller,
It is able to achieve the purpose of the arbitrarily polarization state of control light.However, the use of optical fiber polarization controller, increase system complexity at
This.Therefore, a kind of adjustable online fibre optic polarizer of polarization degree is designed, is of great significance.
Utility model content
The purpose of this utility model is to provide a kind of adjustable optic fibre polarizers, are realized by adjusting magnetic field strength to light
The modulation of degree of polarization, solve only has single degree of polarization in the prior art, only with Polarization Controller with the use of could be with
Meaning changes the technical issues of polarization state of light.
Adjustable optic fibre polarizer described in the utility model, including fibre optic polarizer ontology, fibre optic polarizer ontology include:
Closed container, D-type optical fiber and field generator for magnetic, magnetic fluid is distributed with inside closed container, and D-type optical fiber is arranged in closed container
It is interior, and be dipped into magnetic fluid, the left and right ends of D-type optical fiber, which are respectively equipped with, imports optical fiber and export optical fiber, imports optical fiber and leads
Optical fiber is located at the outside of closed container out, and field generator for magnetic is located at the outside of closed container, for generating magnetic induction line, magnetic field hair
The side rubbing down face for being oriented parallel to D-type optical fiber for the magnetic induction line that generating apparatus generates.
D-type optical fiber both ends, which are connected with, imports optical fiber and export optical fiber, to direct light into, export D-type optical fiber；In closed container
It is distributed magnetic fluid, D-type optical fiber is immersed in magnetic fluid；Field generator for magnetic is arranged in external in closed container；When light passes through D type
When optical fiber, modulation of the magnetic field strength realization to the degree of polarization of light is adjusted.
The field generator for magnetic includes the first electromagnet and the second electromagnet, the first electromagnet and the second electromagnet position
Two sides outside closed container, the first electromagnet and the second electromagnet are opposite pole electromagnet.
The direction for the magnetic induction line that the side rubbing down face of the D-type optical fiber is generated close to fiber cores, field generator for magnetic is flat
Row is in the side rubbing down face of D-type optical fiber.
Throughout magnetic nanoparticle in the magnetic fluid, field generator for magnetic energization causes the magnetic Nano in magnetic fluid
Particle arranges chaining along magnetic induction line direction.
When light passes through D-type optical fiber, it is powered to the first electromagnet and the second electromagnet, the first electromagnet and the second electromagnet
Magnetic field is generated, the magnetic nanoparticle caused in magnetic fluid arranges chaining along magnetic direction, and magnetic nanoparticle chain is to along magnetic field
The polarised light of direction vibration generates stronger absorption, and weaker to the polarized light absorption perpendicular to magnetic direction, thus realization pair
The polarizing of light changes the intensity in magnetic field, and the degree of polarization of light is adjusted.
The closed container is cuboid or cylindrical structure, and is made of hard material.
The D-type optical fiber uses quartz material.
The utility model compared with prior art, has the following beneficial effects:
Adjustable optic fibre polarizer described in the utility model, by adjusting magnetic field strength realization to the tune of the degree of polarization of light
System, in fiber optic communication, fiber optic sensing applications, traditional fibre optic polarizer must cooperate with optical fiber polarization controller, Cai Nengshi
Now arbitrarily control the purpose of polarization state.However, the use of optical fiber polarization controller, increases system complexity and cost.If
A kind of adjustable optic fibre polarizer is counted, by adjusting modulation of the magnetic field strength realization to the degree of polarization of light, as soon as only need a system, energy
Complete the function that traditional fiber polarizer combines realization with optical fiber polarization controller；Solve asking of occurring in the prior art
Topic.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment；
Fig. 2 is the schematic cross-sectional view of closed container in the utility model embodiment；
In figure: 1, the first electromagnet；2, magnetic induction line；3, optical fiber is imported；4, D-type optical fiber；5, the second electromagnet；6, magnetic current
Body；7, optical fiber is exported；8, closed container；9, magnetic nanoparticle；10, fiber cores.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and examples:
Embodiment 1:
As shown in Figs. 1-2, adjustable optic fibre polarizer described in the utility model, comprising: closed container 8,4 and of D-type optical fiber
Magnetic fluid 6 is distributed with inside closed container 8 for field generator for magnetic, and D-type optical fiber 4 is arranged in closed container 8, and is dipped into magnetic
In fluid 6, the left and right ends of D-type optical fiber 4, which are respectively equipped with, imports optical fiber 3 and export optical fiber 7, imports optical fiber 3 and export optical fiber 7
In the outside of closed container 8, field generator for magnetic is located at the outside of closed container 8, and for generating magnetic induction line 2, magnetic field is filled
Set the side rubbing down face for being oriented parallel to D-type optical fiber 4 of the magnetic induction line 2 of generation.
In order to further illustrate above-described embodiment, field generator for magnetic includes the first electromagnet 1 and the second electromagnet 5, the
One electromagnet 1 and the second electromagnet 5 are located at the two sides up and down outside closed container 8, and the first electromagnet 1 and the second electromagnet 5 are
Opposite pole electromagnet.
In order to further illustrate above-described embodiment, close to fiber cores 10, magnetic field is filled in the side rubbing down face of D-type optical fiber 4
Set the side rubbing down face for being oriented parallel to D-type optical fiber 4 of the magnetic induction line 2 of generation.
In order to further illustrate above-described embodiment, throughout magnetic nanoparticle 9 in magnetic fluid 6, field generator for magnetic is powered
The magnetic nanoparticle 9 caused in magnetic fluid 6 arranges chaining along 2 direction of magnetic induction line.
In order to further illustrate above-described embodiment, closed container 8 is cuboid or cylindrical structure, and by hard material system
At.
In order to further illustrate above-described embodiment, D-type optical fiber 4 uses quartz material.
The working principle of the present embodiment are as follows: in the present embodiment, closed container 8 is made of hard material, and is cuboid knot
Structure, closed container 8 can be made square glass pipe in practice；D-type optical fiber 4 uses quartz material.
Adjustable optic fibre polarizer is when adjusting the degree of polarization of light, comprising the following steps:
1) 4 both ends of D-type optical fiber can direct light by importing optical fiber 3 and export optical fiber 7, export D-type optical fiber 4；
2) it is distributed magnetic fluid 6 in closed container 8, D-type optical fiber 4 is immersed in magnetic fluid 6；
3) first electromagnet 1 and second electromagnet staggered relatively in two pieces of opposite poles of external setting of closed container 8
5, the magnetic induction line 2 that the first electromagnet 1 and the second electromagnet 5 generate is oriented parallel to the rubbing down face of D-type optical fiber 4；
4) it when light passes through D-type optical fiber 4, is powered to the first electromagnet 1 and the second electromagnet 5, the first electromagnet 1 and second
Electromagnet 5 generates magnetic field, and the magnetic nanoparticle 9 caused in magnetic fluid 6 arranges chaining along 2 direction of magnetic induction line, such as Fig. 1,2 institutes
Showing, magnetic nanoparticle chain generates stronger absorption to the polarised light vibrated along 2 direction of magnetic induction line, and to perpendicular to magnetic induction line 2
The polarized light absorption in direction is weaker, to realize the polarizing to light, changes the intensity in magnetic field, and the degree of polarization of light is adjusted.
9 size of magnetic nanoparticle in magnetic fluid 6 used in the present embodiment is minimum, and magnetic fluid 6 shows superparamagnetism, applies
Add certain magnetic field that will cause a part of magnetic nanoparticle 9 and arrange chaining, makes magnetic fluid 6 that magneto-optic dichroism be presented, thus
To generating different absorptions along the polarised light that different directions vibrate；After removing magnetic field, magnetic nanoparticle chain rapidly disappears, magnetic current
Body 6 no longer shows magneto-optic dichroism, and the Polarization Modulation of light also disappears.
Using the adjustable optic fibre polarizer of the embodiments of the present invention being described in conjunction with the accompanying above, by adjusting magnetic field
Intensity realizes the modulation to the degree of polarization of light, and solve only has single degree of polarization in the prior art, only with Polarization Controller
The technical issues of with the use of the polarization state that could arbitrarily change light.But the utility model is not limited to described embodiment party
Formula, do not depart from the principles of the present invention and spirit in the case where these to embodiment carry out variation, modification, replacement and
Deformation is still fallen in the protection scope of the utility model.
Claims (6)
1. a kind of adjustable optic fibre polarizer, including fibre optic polarizer ontology, it is characterised in that: the fibre optic polarizer ontology packet
Include: closed container (8), D-type optical fiber (4) and field generator for magnetic, closed container (8) is internal to be distributed with magnetic fluid (6), D type light
Fine (4) setting is dipped into magnetic fluid (6) in closed container (8), and the left and right ends of D-type optical fiber (4) are respectively equipped with importing
Optical fiber (3) and export optical fiber (7) import optical fiber (3) and export the outside that optical fiber (7) are located at closed container (8), and magnetic field fills
Setting in the outside of closed container (8), for generating magnetic induction line (2), the direction for the magnetic induction line (2) that field generator for magnetic generates is flat
Row is in the side rubbing down face of D-type optical fiber (4).
2. adjustable optic fibre polarizer according to claim 1, it is characterised in that: the field generator for magnetic includes first
Electromagnet (1) and the second electromagnet (5), the first electromagnet (1) and the second electromagnet (5) are located at external two of closed container (8)
Side, the first electromagnet (1) and the second electromagnet (5) are opposite pole electromagnet.
3. adjustable optic fibre polarizer according to claim 1 or 2, it is characterised in that: the side of the D-type optical fiber (4)
Rubbing down face is close to fiber cores (10).
4. adjustable optic fibre polarizer according to claim 1 or 2, it is characterised in that: throughout magnetic in the magnetic fluid (6)
Property nano particle (9), field generator for magnetic be powered cause magnetic fluid (6) in magnetic nanoparticle (9) along magnetic induction line (2) direction
Arrange chaining.
5. adjustable optic fibre polarizer according to claim 1, it is characterised in that: the closed container (8) is cuboid
Or cylindrical structure, and be made of hard material.
6. adjustable optic fibre polarizer according to claim 1, it is characterised in that: the D-type optical fiber (4) is using quartzy material
Material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821402399.6U CN208689305U (en) | 2018-08-29 | 2018-08-29 | Adjustable optic fibre polarizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821402399.6U CN208689305U (en) | 2018-08-29 | 2018-08-29 | Adjustable optic fibre polarizer |
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| Publication Number | Publication Date |
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| CN208689305U true CN208689305U (en) | 2019-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821402399.6U Expired - Fee Related CN208689305U (en) | 2018-08-29 | 2018-08-29 | Adjustable optic fibre polarizer |
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| CN (1) | CN208689305U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110865471A (en) * | 2019-10-29 | 2020-03-06 | 桂林电子科技大学 | Fiber integrated magneto-optical switch and manufacturing method thereof |
-
2018
- 2018-08-29 CN CN201821402399.6U patent/CN208689305U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110865471A (en) * | 2019-10-29 | 2020-03-06 | 桂林电子科技大学 | Fiber integrated magneto-optical switch and manufacturing method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190402 Termination date: 20190829 |