CN104932058B - A kind of optoisolator - Google Patents
A kind of optoisolator Download PDFInfo
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- CN104932058B CN104932058B CN201510415128.9A CN201510415128A CN104932058B CN 104932058 B CN104932058 B CN 104932058B CN 201510415128 A CN201510415128 A CN 201510415128A CN 104932058 B CN104932058 B CN 104932058B
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- Prior art keywords
- optical waveguide
- medium
- planar optical
- optoisolator
- planar
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2746—Optical coupling means with polarisation selective and adjusting means comprising non-reciprocal devices, e.g. isolators, FRM, circulators, quasi-isolators
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Integrated Circuits (AREA)
Abstract
The invention discloses a kind of optoisolators, including planar optical waveguide and are connected on the input terminal of the planar optical waveguide respectively and a pair of of output terminal couples optical fiber head；The medium that periodic arrangement and refractive index have differences with ambient substance is distributed with using optical waveguide as symmetry axis in one section of both sides of the planar optical waveguide；For arbitrarily perpendicular to the straight line of the planar optical waveguide, the medium will not all form mirror symmetry.So as to without components such as the polarizer, magneto-optical crystal, magnetic fields, substantially reduce cost.
Description
Technical field
The present invention relates to optic communication device more particularly to optoisolators.
Background technology
Semiconductor laser and image intensifer etc. are very sensitive to the reflected light from connector, fusion point, wave filter etc.,
It is easy to cause penalty.Therefore, it is necessary to prevent reflected light with optoisolator.Optoisolator, which is a kind of, allows light along a side
To by and stop in the opposite direction light by optical passive component.It can be by optoisolator very by the light of optical fiber echo reflection
It is isolated well, in high-speed or long-distance optical fiber communication, optoisolator has become essential important devices.For height
In the dense wave division multipurpose fiber optic communication of speed development, optoisolator is even more to play huge effect.
Existing optoisolator is all based on Faraday effect nonreciprocity, including the polarizer, magneto-optical crystal, magnetic field etc..
If polarize unrelated, it is also necessary to increase many elements, normally isolate device isolation and accomplish 20dB.Existing isolator makes multiple
Miscellaneous, process is various, and micro-element puts, it is all very time-consuming to fix, and product index is inconsistent, is unfavorable for mass producing.
Invention content
The purpose of the present invention is to provide a kind of optoisolator based on Planar Lightwave Circuit Technology, without the polarizer, magneto-optic
The components such as crystal, magnetic field, substantially reduce cost.
Realizing the technical solution of above-mentioned purpose is：
A kind of optoisolator is connected on input terminal and the output of the planar optical waveguide including planar optical waveguide and respectively
A pair of of coupling optical fiber head at end；
Periodic arrangement and refractive index and week is distributed with using optical waveguide as symmetry axis in one section of both sides of the planar optical waveguide
Enclose the medium that substance has differences；
For arbitrarily perpendicular to the straight line of the planar optical waveguide, the medium will not all form mirror symmetry.
In above-mentioned optoisolator, the size of the medium is 50 times to 0.5 times of optical wavelength.
In above-mentioned optoisolator, the medium is cylindrical, and is divided at least two classes by the difference of cylindrical radius,
Line of demarcation between every two classes medium is not vertical with the planar optical waveguide.
In above-mentioned optoisolator, the medium is in strip, and the line in the medium apart from longest point-to-point transmission is not
It is perpendicular or parallel with the planar optical waveguide.
The beneficial effects of the invention are as follows：The present invention is made using Planar Lightwave Circuit Technology and photonic crystal technology to light
Transmission direction has the optical waveguide of discrimination, to realize isolator characteristic.Without using components such as magneto-optical crystal, the polarizer, magnets, significantly
Cost is reduced, can be mass produced.
Description of the drawings
Fig. 1 is the optically isolated schematic diagram of the first embodiment of optoisolator of the present invention；
Fig. 2 is the optically isolated schematic diagram of the second embodiment of optoisolator of the present invention；
Fig. 3 is the optically isolated schematic diagram of the 3rd embodiment of optoisolator of the present invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
It please refers to Fig.1, Fig. 2 and Fig. 3, optoisolator of the invention are connected on including planar optical waveguide 1 and respectively plane
The input terminal of optical waveguide 1 and a pair of of coupling optical fiber head (not shown) of output terminal.Coupling optical fiber head plays an optical coupling into flat
Face optical waveguide 1 and from the optical coupling that optical waveguide exports into the effect of optical fiber.Planar optical waveguide 1 can be that quartz is made,
Can be monocrystalline silicon.
Light is transferred to output terminal from 1 input terminal of planar optical waveguide, and evanescent wave field is formed on 1 periphery of planar optical waveguide.Plane
One section of both sides of optical waveguide 1 are distributed with periodic arrangement and refractive index have differences with ambient substance using optical waveguide as symmetry axis
Medium 2.The size of medium 2 is tens times of optical wavelength and arrives several times of zero, is analogous with optical wavelength.In the present embodiment,
The size of medium 2 is 50 times to 0.5 times of optical wavelength.
Medium 2 is arranged and planar optical waveguide 1 is angled.For arbitrarily perpendicular to the straight line of planar optical waveguide 1, medium
2 will not all form mirror symmetry.2 periodic arrangement of medium is formed, and shape is indefinite, needs to meet：Arbitrarily vertical plane optical waveguide 1 is straight
Line is not the mirror shaft of medium 2.
In one embodiment, medium 2 is cylindrical, as shown in Figure 1, it is divided at least two classes by the difference of cylindrical radius,
Line of demarcation between every two classes medium is not vertical with planar optical waveguide 1.This photonic crystal is to the light from input terminal to output terminal
The binding effect of the evanescent wave of formation than from output terminal to input terminal light formed evanescent wave binding effect it is big, cause from
The light loss of output terminal passback is greater than the loss of the light transmitted from input terminal forward direction.The photonic crystal of this structure can be multistage
Arrangement, to increase nonreciprocal effect.
In another embodiment, medium 2 is in strip, apart from longest point-to-point transmission in the medium 2 of 1 side of planar optical waveguide
Line is not perpendicular or parallel with planar optical waveguide 1, as shown in Figure 2.Certainly, medium 2 can also be in special shape, such as Fig. 3.Medium
2 itself and its period arrangement modes, which cause to form different constraints to the evanescent wave that positive transmission light and reverse transfer light are formed, imitates
Fruit.
Above example is used for illustrative purposes only rather than limitation of the present invention, the technology people in relation to technical field
Member, without departing from the spirit and scope of the present invention, can also make various transformation or modification, therefore all equivalent
Technical solution should also belong to scope of the invention, should be limited by each claim.
Claims (2)
1. a kind of optoisolator, which is characterized in that be connected on the input of the planar optical waveguide including planar optical waveguide and respectively
End and a pair of of coupling optical fiber head of output terminal；
Using optical waveguide as symmetry axis periodic arrangement is distributed with and refractive index and ambient in one section of both sides of the planar optical waveguide
The medium that matter has differences；
In the plane residing for planar optical waveguide and medium, for arbitrarily perpendicular to the straight line of the planar optical waveguide, being given an account of
Matter will not all form mirror symmetry；
The medium is in strip, and the line in each described medium apart from longest point-to-point transmission does not hang down with the planar optical waveguide
It is straight or parallel.
2. optoisolator according to claim 1, which is characterized in that the size of the medium is 50 times of optical wavelength and arrives
0.5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510415128.9A CN104932058B (en) | 2015-07-15 | 2015-07-15 | A kind of optoisolator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510415128.9A CN104932058B (en) | 2015-07-15 | 2015-07-15 | A kind of optoisolator |
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| Publication Number | Publication Date |
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| CN104932058A CN104932058A (en) | 2015-09-23 |
| CN104932058B true CN104932058B (en) | 2018-07-10 |
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| CN201510415128.9A Active CN104932058B (en) | 2015-07-15 | 2015-07-15 | A kind of optoisolator |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226924A (en) * | 2016-08-31 | 2016-12-14 | 欧阳征标 | Magneto-optic memory technique void fraction wave magnetic conduction surface fast wave optical diode |
| CN106291811B (en) * | 2016-08-31 | 2019-04-23 | 欧阳征标 | The fast mould random angle of the low damage type magneto-optic gap magnetic surface of No leakage unidirectionally turns round waveguide |
| CN106249444A (en) * | 2016-08-31 | 2016-12-21 | 欧阳征标 | Non-leakage magnetic luminescent material void fraction wave magnetic conduction surface Fast-wave direction controllable light diode |
| CN106249352B (en) * | 2016-08-31 | 2019-04-30 | 欧阳征标 | The low damage type magneto-optic gap fast mould random angle of magnetic surface unidirectionally turns round waveguide |
| CN106154415B (en) * | 2016-08-31 | 2021-05-04 | 深圳大学 | Low-loss magneto-optical gap magnetic surface fast mode arbitrary direction controllable one-way turning waveguide |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955058A (en) * | 2014-05-07 | 2014-07-30 | 山东省科学院激光研究所 | Optoisolator obtained through photonic crystal direction band gap |
| CN104460174A (en) * | 2014-12-12 | 2015-03-25 | 南昌航空大学 | Implementation method of all-optical diode based on two-dimensional photonic crystal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5483655B1 (en) * | 2013-07-11 | 2014-05-07 | 日本電信電話株式会社 | Optical storage device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955058A (en) * | 2014-05-07 | 2014-07-30 | 山东省科学院激光研究所 | Optoisolator obtained through photonic crystal direction band gap |
| CN104460174A (en) * | 2014-12-12 | 2015-03-25 | 南昌航空大学 | Implementation method of all-optical diode based on two-dimensional photonic crystal |
Non-Patent Citations (2)
| Title |
|---|
| Asymmetric light propagation in chirped photonic crystal waveguides;H. Kurt et al.;《OPTICS EXPRESS》;20120827;第20卷(第18期);第20636页最后1段至20646页第1段，及附图1-9 * |
| 基于异质结界面优化的光子晶体二极管单向传输特性研究;程立锋等;《物理学报》;20141231;第63卷(第15期);全文 * |
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