CN104932058A - Optical isolator - Google Patents
Optical isolator Download PDFInfo
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- CN104932058A CN104932058A CN201510415128.9A CN201510415128A CN104932058A CN 104932058 A CN104932058 A CN 104932058A CN 201510415128 A CN201510415128 A CN 201510415128A CN 104932058 A CN104932058 A CN 104932058A
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- Prior art keywords
- optical waveguide
- planar optical
- medium
- 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
Abstract
The present invention discloses an optical isolator, comprising a planar optical waveguide, and a pair of coupling optical fiber heads which are respectively connected to an input end and an output end of the planar optical waveguide; wherein mediums which are periodically arranged and have the refractive index different from the refractive indexes of peripheral substances are distributed at two sides of a section of the planar optical waveguide in the way of taking the planar optical waveguide as a symmetric axis; for any one straight line perpendicular to the planar optical waveguide, the mediums cannot form mirror symmetry, in this way, components such as polarizer, magneto-optical crystal and magnetic field are not used, thereby greatly reducing cost.
Description
Technical field
The present invention relates to optic communication device, particularly relate to optoisolator.
Background technology
Semiconductor laser and image intensifer etc. are very responsive to the reflected light from connector, fusion point, wave filter etc., easily cause penalty.Therefore, need to stop reflected light with optoisolator.Optoisolator is a kind of and allows light pass through along a direction and in the opposite direction stop the optical passive component that light passes through.Can be isolated well by optoisolator by the light of optical fiber echo reflection, in two-forty or long-distance optical fiber communication, optoisolator has become requisite important devices.For in the dense wave division multipurpose optical fiber communication of high speed development, optoisolator plays huge effect especially.
Existing optoisolator, all based on Faraday effect nonreciprocity, comprises the polarizer, magneto-optical crystal, magnetic field etc.If want polarization to have nothing to do, also need to increase a lot of element, general isolator isolation accomplishes 20dB.Existing isolator makes complicated, and operation is various, and micro-element is put, it is all very consuming time to fix, and product index is inconsistent, is unfavorable for large-scale production.
Summary of the invention
The object of the present invention is to provide a kind of optoisolator based on Planar Lightwave Circuit Technology, without parts such as the polarizer, magneto-optical crystal, magnetic fields, greatly reduce costs.
The technical scheme realizing above-mentioned purpose is:
A kind of optoisolator, comprises planar optical waveguide, and is connected on the input end of described planar optical waveguide and a pair coupled fiber head of output terminal respectively;
The both sides of one section of described planar optical waveguide are axis of symmetry with optical waveguide, are distributed with periodic arrangement and the medium that there are differences of refractive index and ambient substance;
For any straight line perpendicular to described planar optical waveguide, described medium all can not form specular.
In above-mentioned optoisolator, the size of described medium is 50 times of optical wavelength to 0.5 times.
In above-mentioned optoisolator, described medium all in cylindric, and is divided at least two classes by the difference of cylindrical radius, and the separatrix between every two class media is not vertical with described planar optical waveguide.
In above-mentioned optoisolator, described medium is strip, and the line of the longest point-to-point transmission of described medium middle distance is not perpendicular or parallel with described planar optical waveguide.
The invention has the beneficial effects as follows: the present invention utilizes Planar Lightwave Circuit Technology and the transmission direction of photonic crystal fabrication techniques to light to have the optical waveguide of discrimination, realizes isolator characteristic.Do not use the parts such as magneto-optical crystal, the polarizer, magnet, greatly reduce cost, can large-scale production.
Accompanying drawing explanation
Fig. 1 is the light isolation schematic diagram of the first embodiment of optoisolator of the present invention;
Fig. 2 is the light isolation schematic diagram of the second embodiment of optoisolator of the present invention;
Fig. 3 is the light isolation schematic diagram of the 3rd embodiment of optoisolator of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Refer to Fig. 1, Fig. 2 and Fig. 3, optoisolator of the present invention, comprise planar optical waveguide 1, and be connected on the input end of planar optical waveguide 1 and a pair coupled fiber head (not shown) of output terminal respectively.Coupled fiber head plays and planar optical waveguide 1 is entered in optically-coupled, and the effect of optical fiber is entered in the optically-coupled exported from optical waveguide.Planar optical waveguide 1 can be that quartz is made, and also can be monocrystalline silicon.
Light is transferred to output terminal from planar optical waveguide 1 input end, forms evanescent wave field at planar optical waveguide 1 periphery.The both sides of one section of planar optical waveguide 1 are axis of symmetry with optical waveguide, are distributed with periodic arrangement and the medium 2 that there are differences of refractive index and ambient substance.The size of medium 2 be tens times of optical wavelength to zero point several times, be analogous with optical wavelength.In the present embodiment, the size of medium 2 is 50 times of optical wavelength to 0.5 times.
Medium 2 arrange and planar optical waveguide 1 angled.For any straight line perpendicular to planar optical waveguide 1, medium 2 all can not form specular.Medium 2 periodic arrangement is formed, and shape is indefinite, need meet: the straight line of vertical plane optical waveguide 1 is not the mirror shaft of medium 2 arbitrarily.
In one embodiment, medium 2, all in cylindric, as shown in Figure 1, is divided at least two classes by the difference of cylindrical radius, and the separatrix between every two class media is not vertical with planar optical waveguide 1.This photonic crystal is large to the binding effect of the evanescent wave that the binding effect of the evanescent wave that the light from input end to output terminal is formed is formed than the light from output terminal to input end, causes the loss being greater than the light from the transmission of input end forward from the light loss of output terminal passback.The photonic crystal of this structure can multiple stage arrangement, to increase nonreciprocal effect.
In another embodiment, medium 2 is in strip, and the line of the longest point-to-point transmission of medium 2 middle distance of planar optical waveguide 1 side is not perpendicular or parallel with planar optical waveguide 1, as shown in Figure 2.Certainly, medium 2 can be also special shape, as Fig. 3.Medium 2 itself and cycle arrangement mode thereof cause the evanescent wave to forward transmission light and reverse transfer light are formed to form different constraint effects.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, various conversion or modification can also be made, therefore all equivalent technical schemes also should belong to category of the present invention, should be limited by each claim.
Claims (4)
1. an optoisolator, is characterized in that, comprises planar optical waveguide, and is connected on the input end of described planar optical waveguide and a pair coupled fiber head of output terminal respectively;
The both sides of one section of described planar optical waveguide are axis of symmetry with optical waveguide, are distributed with periodic arrangement and the medium that there are differences of refractive index and ambient substance;
For any straight line perpendicular to described planar optical waveguide, described medium all can not form specular.
2. optoisolator according to claim 1, is characterized in that, the size of described medium is 50 times of optical wavelength to 0.5 times.
3. optoisolator according to claim 1, is characterized in that, described medium all in cylindric, and is divided at least two classes by the difference of cylindrical radius, and the separatrix between every two class media is not vertical with described planar optical waveguide.
4. optoisolator according to claim 1, is characterized in that, described medium is strip, and the line of the longest point-to-point transmission of described medium middle distance is not perpendicular or parallel with described planar optical waveguide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510415128.9A CN104932058B (en) | 2015-07-15 | 2015-07-15 | A kind of optoisolator |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN104932058A true CN104932058A (en) | 2015-09-23 |
| CN104932058B 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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Cited By (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 |
| CN106249352A (en) * | 2016-08-31 | 2016-12-21 | 欧阳征标 | The low damage type magneto-optic space magnetic surface unidirectional waveguide of turning round of fast mould random angle |
| 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 |
| CN106291811A (en) * | 2016-08-31 | 2017-01-04 | 欧阳征标 | The No leakage low damage type magneto-optic space magnetic surface unidirectional waveguide of turning round of fast mould random angle |
| WO2018041178A1 (en) * | 2016-08-31 | 2018-03-08 | 深圳大学 | Magnetic surface fast-mode arbitrary-direction controllable unidirectional bend waveguide with low-loss magneto-optic gap |
Citations (3)
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| 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 |
| JP2015018589A (en) * | 2013-07-11 | 2015-01-29 | 日本電信電話株式会社 | Optical storage device |
| 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 |
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2015
- 2015-07-15 CN CN201510415128.9A patent/CN104932058B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015018589A (en) * | 2013-07-11 | 2015-01-29 | 日本電信電話株式会社 | Optical storage device |
| 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)
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| H. KURT ET AL.: "Asymmetric light propagation in chirped photonic crystal waveguides", 《OPTICS EXPRESS》 * |
| 程立锋等: "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", 《物理学报》 * |
Cited By (8)
| 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 |
| CN106249352A (en) * | 2016-08-31 | 2016-12-21 | 欧阳征标 | The low damage type magneto-optic space magnetic surface unidirectional waveguide of turning round of fast mould random angle |
| 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 |
| CN106291811A (en) * | 2016-08-31 | 2017-01-04 | 欧阳征标 | The No leakage low damage type magneto-optic space magnetic surface unidirectional waveguide of turning round of fast mould random angle |
| WO2018041180A1 (en) * | 2016-08-31 | 2018-03-08 | 深圳大学 | Magnetic surface fast wave direction-controllable photodiode with leakless magneto-optical material gap waveguide |
| WO2018041178A1 (en) * | 2016-08-31 | 2018-03-08 | 深圳大学 | Magnetic surface fast-mode arbitrary-direction controllable unidirectional bend waveguide with low-loss magneto-optic gap |
| 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 |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN104932058B (en) | 2018-07-10 |
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