CN207937637U - Magnetic control cavity switches type ROADM based on 2 D photon crystal - Google Patents
Magnetic control cavity switches type ROADM based on 2 D photon crystal Download PDFInfo
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- CN207937637U CN207937637U CN201721741315.7U CN201721741315U CN207937637U CN 207937637 U CN207937637 U CN 207937637U CN 201721741315 U CN201721741315 U CN 201721741315U CN 207937637 U CN207937637 U CN 207937637U
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Abstract
The utility model discloses a kind of magnetic control cavity switches type ROADM based on 2 D photon crystal, including 2 D photon crystal unit, main waveguide, lower road waveguide, upper road waveguide, the first magnetic control cavity switches region, the second magnetic control cavity switches region, reflection micro-cavitiy are equipped on 2 D photon crystal unit, the waveguide of lower road is mutually parallel with upper road waveguide and is mutually perpendicular to simultaneously with main waveguide, and a Ferrite defective media column is respectively equipped in the first magnetic control cavity switches region, in the second magnetic control cavity switches region and in reflection micro-cavitiy.The utility model introduces line defect and point defect in 2 D photon crystal that is small, being easily integrated, realizes the function of similar resonant cavity, is achieved in the transmissivity of low-loss transmission and 90% or more；By introducing Ferrite defective media column in point defect, design magnetic control resonant cavity type switch realizes the dynamic recognition of dwdm system C-band and L-band, and flexibility is high, is conducive to Remote Dynamic and reconstructs.
Description
Technical field
The utility model is related to a kind of ROADM more particularly to a kind of magnetic control cavity switches based on 2 D photon crystal
Type ROADM.
Background technology
With the rise of the emerging information technology such as Internet of Things, smart city, the integration of three networks, cloud computing, all trades and professions are to height
The requirement of fast information transmission is higher and higher, and for Optical Transmission Network OTN as the basis for providing transmitting, role is increasing, hair
Exhibition is more and more rapider, and thing followed operation cost is also higher and higher, is embodied in：The high-frequency light for crisscross intersection occur
Transmission main line and the larger uplink/downlink node of quantity.Therefore operator to light transmit the flexibility of backbone network, fast dispatch with
Distribution proposes new requirement.Reconfigurable optical add/drop multiplexer (Reconfigurable Optical Add-Drop
Multiplexer) i.e. ROADM is as node Primary Component, have can flexible dispatching wavelength business, can reduce and build light transmission
The cost of backbone network reduces the excellent specific properties such as the wasting of resources, becomes the emphasis of photoelectric information industry research.
ROADM is a kind of use in wavelength-division multiplex (Wavelength Division Multiplexing, WDM) system
In device or equipment, effect is reconfigured by long-range, realizes that wavelength business uploads and downloads.That is,
The wavelength of upper and lower business can be arbitrarily assigned as needed in the centre of circuit, realize the flexible dispatching of business.
Common ROADM can be divided into switching mode and tuning type two major classes.Switching mode ROADM mainly has " channel-splitting filter+photoswitch
+ wave multiplexer " structure and two class of " AWG+ photoswitches " structure, for the ROADM devices of switching mode, be first pass through channel-splitting filter will be more
Wavelength signals are divided into multiple Single wavelength signals, and then Single wavelength signal is downloaded and is uploaded by photoswitch.And for adjusting
Humorous type ROADM devices mainly realize wavelength download, upload and straight-through function by tuning filtering device.It generally uses adjustable
Humorous filter isolates required wavelength signals in multi-wavelength signals from the backbone network of telecommunication network, then passes through download
The down operation of the signal is realized in port, while can also upload required wavelength signals from upwards transmission port and enter backbone network.
Tunable ROADM devices are divided into：Wavelength blocks the ROADM (WB- of (Wavelength Blocker, WB) structure
ROADM), the ROADM of integrated planar waveguide (Integrated Planar Lightwave Circuits, IPLC) structure, wave
The ROADM of long selecting switch (Wavelength Selective Switch, WSS) structure.
For the transmission of the high-speed, large capacity of realization all-optical network, ROADM is always towards integrated, low-loss, high isolation
Degree, efficient coupling direction are developed, lower mask body introduction：
1, ROADM's is integrated：
The prior art integrates the devices such as optical demultiplexer, optical multiplexer, attenuator and photoswitch on the one wafer
Integrated planar waveguide type ROADM.Such as the single-chip integration ROADM that German Fraunhofer Institute are reported, it is rolled over by superelevation
It penetrates rate difference polymeric material to form, overall structure includes four channels ROADM, two digital array of photoswitch, two numbers
Word photoswitch and two array wave-guide grating structures, its insertion loss are less than 17dB, and crosstalk is less than -2dB, chip size
20mm*30mm.Also have based on InP base single-chip integration ROADM, it uses twin-guide integrated technology, and structure is more compact, entirely
Chip size 10mm*6mm.
2, in terms of loss：
There is the ROADM based on WSS structures, combine PLC technology on this basis, realizes 1*9WSS, the number of channel 39, channel
It is spaced 0.8mm, insertion loss, which is realized, is less than 7.6dB.Also there is the WSS using LCoS technologies, a kind of LCD technologies of LCoS can
It has chance with one and designs multiple units on silicon chip, and each unit has corresponding electronic control unit, passes through regulation unit
Bias voltage realizes that the control to each pixel unit reflected light, basic structure 1*9WSS, insertion loss are less than 5dB.
Above-mentioned tradition ROADM is still unsatisfactory in terms of integrated level and loss, and specific reason is as follows：
1. the devices such as optical demultiplexer, attenuator and photoswitch are integrated based on integrated planar waveguide (PLC) structure ROADM
On the one wafer, it due to the limitation of parts selection itself and material, is difficult to realize integral device and breaks through mm magnitudes, so causing
Integrated level is not high, micromation is poor.
2. once the ROADM demultiplexers and optical multiplexer due to WB structures determine that the wavelength for uploading and downloading is also true
Fixed, overall structure is relatively easy, loses flexibility and the long-range restructural ability for uploading and downloading signal, causes to be inserted into
Loss is big, flexibility is not high, it is complex to realize.
Utility model content
The purpose of this utility model is that solve the above-mentioned problems and provides the base that a kind of integrated level is high and loss is low
In the magnetic control cavity switches type ROADM of 2 D photon crystal.
The utility model is achieved through the following technical solutions above-mentioned purpose：
A kind of magnetic control cavity switches type ROADM based on 2 D photon crystal, including photonic crystal lattice constant are a
Nm, the 2 D photon crystal unit that passive silicon medium column radius is b nm, are equipped with one on the 2 D photon crystal unit
Lower road waveguide that main waveguide that longer line defect is formed, a shorter line defect are formed, a shorter line defect are formed
Upper road waveguide, a center remove the first magnetic control cavity switches area that the corresponding passive silicon dielectric posts are formed
Domain, a center remove the second magnetic control cavity switches region that the corresponding passive silicon dielectric posts are formed, in one
Heart position removes the reflection micro-cavitiy that the corresponding passive silicon dielectric posts are formed, and the lower road waveguide and the upper road waveguide are mutual
It is parallel and be mutually perpendicular to simultaneously with the main waveguide, the first magnetic control cavity switches region be set to the main waveguide with it is described
Between the waveguide of lower road, the second magnetic control cavity switches region is set between the main waveguide and the upper road waveguide, described
Reflection micro-cavitiy is set to the center between the first magnetic control cavity switches region and the second magnetic control cavity switches region
Position and the other side positioned at the main waveguide, in the first magnetic control cavity switches region, the second magnetic control resonant cavity
In switch region and it is respectively equipped with a Ferrite defective media column in the reflection micro-cavitiy.
Preferably, in the first magnetic control cavity switches region positioned at quadrangle four passive silicon dielectric posts with
The radius of four passive silicon dielectric posts in the second magnetic control cavity switches region positioned at quadrangle is 2b nm.
Preferably, the Ferrite defective media column in the first magnetic control cavity switches region is located at center
Position deviates the position of 2b nm to the main waveguide, and the Ferrite in the second magnetic control cavity switches region lacks
It falls into dielectric posts and is located at center to the position of the upper road waveguide offset 2b nm.
Preferably, the Ferrite defective media column in the reflection micro-cavitiy is located at center to the main wave
Lead the position of offset 2b nm.
Preferably, the radius of the Ferrite defective media column is 0.09a-0.12a nm, wherein a is light
The value of sub- crystal lattice constant.
Preferably, a is 500, the b is 100.
Preferably, set the axial direction of the corresponding line defect of main waveguide of the 2 D photon crystal unit as cephalocaudal direction,
The magnetic control cavity switches type ROADM based on 2 D photon crystal includes the two-dimensional photon of multiple mutual head and the tail connections
Crystal unit.
The beneficial effects of the utility model are：
The utility model utilizes artificial micro-structure material --- photonic crystal, has extremely strong light control capacity, and volume
It is small, be easily integrated, waveguide dimensions can accomplish number of wavelengths magnitude, this is integrated, miniature for reconfigurable optical add/drop multiplexer
Change provides possibility；Line defect, that is, waveguide and point defect, that is, magnetic control cavity switches region and instead are introduced in 2 D photon crystal
Microcavity is penetrated, the bootable light of line defect realizes that light beam is tied to a little by the function of similar waveguide, point defect along the conduction of line defect, real
Now similar to the function of resonant cavity, it is achieved in the transmissivity in the low-loss transmission of big corner and 90% or more, and point is lacked
It falls into and is detached with line defect, centre addition magnetic control cavity switches region constitutes INDIRECT COUPLING structure, uploaded and downloaded；It is logical
The introducing Ferrite defective media column in point defect is crossed, changes Ferrite defective media column magnetic conductivity using magnetic field intensity
Mechanism of action, design magnetic control resonant cavity type switch, realizes dwdm system C-band and L-band dynamic recognition, and flexibility is high, profit
It is reconstructed in Remote Dynamic.
By the way that the other positions of radial design of the passive silicon dielectric posts of quadrangle will be located in two magnetic control cavity switches regions
2 times i.e. 200nm for setting passive silicon medium column radius contributes to the interaction for reducing passive silicon dielectric posts and light, is promoted and penetrated
Rate, and reduce resonance wavelength and the case where multimode occur.
By the way that the Ferrite defective media column in two magnetic control cavity switches regions is set to center to entering light
Direction deviates the position of 2b nm, that is, 200nm, helps to maintain the high Local Characteristic in magnetic control cavity switches region, and have compared with
High light-wave transmission efficiency.
It is to main waveguide offset 2b nm by the way that the Ferrite defective media column in reflection micro-cavitiy is set to center
The position of 200nm, and the radius of the passive silicon dielectric posts of its quadrangle does not increase, and can reflect in road waveguide and the waveguide of lower road
Optical signal improves road efficiency up and down.
By being 0.09a-0.12a nm by the radial design of Ferrite defective media column, make ROADM in S wave bands
(1460nm~1530nm), C-band (1530nm~1565nm) and L-band (1565nm~1625nm) projection efficiency are reachable
90% or more, make ROADM that there is good application foundation in dwdm system.
Has the characteristics that frequency-selecting based on the radius for changing Ferrite defective media column, by by multiple 2 D photon crystals
Unit head and the tail are together in series, and make its more micromation and integrated feature, it is real in dwdm system more to meet ROADM in this way
The service condition on border；The radius for changing the Ferrite defective media column of each 2 D photon crystal unit achieves that single device
Part (i.e. 2 D photon crystal unit and all structures being arranged thereon) specific wavelength being uploaded and downloading；After series connection, each
The frequency-selecting wave band of device is not interfere with each other, can be completed at the same time it is multiwave upload and download, realize dwdm system C-band and L-band
Random route function.
Description of the drawings
Fig. 1 is the two-dimensional photon of the magnetic control cavity switches type ROADM described in the utility model based on 2 D photon crystal
The overlooking structure diagram of crystal unit.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1, the magnetic control cavity switches type ROADM described in the utility model based on 2 D photon crystal includes
The 2 D photon crystal unit 1 that photonic crystal lattice constant is 500nm, the radius of passive silicon dielectric posts 2 is 100nm, in two dimension
Photonic crystal elements 1 are equipped with the lower road wave that 3, shorter line defects of main waveguide that a longer line defect is formed are formed
The 5, centers of upper road waveguide for leading the formation of 4, shorter line defects remove what corresponding passive silicon dielectric posts 2 were formed
It is humorous that first 6, one, magnetic control cavity switches region center removes the second magnetic control that corresponding passive silicon dielectric posts 2 are formed
The center of chamber switch region 7, one that shakes removes the reflection micro-cavitiy 8 that corresponding passive silicon dielectric posts 2 are formed, lower road waveguide 4 with
Upper road waveguide 5 is mutually parallel and is mutually perpendicular to simultaneously with main waveguide 3, the first magnetic control cavity switches region 6 be set to main waveguide 3 with
Between lower road waveguide 4, the second magnetic control cavity switches region 7 is set between main waveguide 3 and upper road waveguide 5, and reflection micro-cavitiy 8 is set to
Center between first magnetic control cavity switches region 6 and the second magnetic control cavity switches region 7 and positioned at main waveguide 3
The other side, 6 interior, the 7 interior and interior difference of reflection micro-cavitiy 8 of the second magnetic control cavity switches region of the first magnetic control cavity switches region
If there are one Ferrite defective media columns 9；It is located at four passive silicon media of quadrangle in first magnetic control cavity switches region 6
Radius in column 2 and the second magnetic control cavity switches region 7 positioned at four passive silicon dielectric posts 2 of quadrangle is 200nm, reflection
The radius of all passive silicon dielectric posts 2 is still 100nm, the Ferrite in the first magnetic control cavity switches region 6 in microcavity 8
Defective media column 9 is located at the position that center deviates 200nm to main waveguide 3, the iron in the second magnetic control cavity switches region 7
Oxygen magnet defective media column 9 is located at the position that the upward road waveguide 5 in center deviates 200nm, the Ferrite in reflection micro-cavitiy 8
Defective media column 9 is located at the position that center deviates 200nm to main waveguide 3, and the radius of Ferrite defective media column 9 is
0.09a-0.12a nm, wherein a are the value of photonic crystal lattice constant, and a values are 500 here.Explanation：Above-mentioned first magnetic control is humorous
Shake chamber switch region 6, the second magnetic control cavity switches region 7 and 8 corresponding region of reflection micro-cavitiy is 2 structure of passive silicon dielectric posts
At 3 × 3 matrixes formed region；Above-mentioned main waveguide 3, lower road waveguide 4, upper road waveguide 5 are that removal a row or column is passive
The line defect that silicon dielectric posts 2 are formed, main waveguide 3 are the line defect of both ends perforation, and lower road waveguide 4 and upper road waveguide 5 are one end
Perforation, the other end still have the line defect of passive silicon dielectric posts 2；Between lower road waveguide 4 and upper road waveguide 5 and main waveguide 3 respectively
There are 5 rows (or 5 row) passive silicon dielectric posts 2, there is 2 rows (or 2 row) passive silicon between the center of reflection micro-cavitiy 8 and main waveguide 3
Dielectric posts 2.Above-mentioned photonic crystal lattice constant 500nm, passive silicon dielectric posts 2 radius 100nm may be other values, according to
Depending on needing.
If the axial direction of the 3 corresponding line defect of main waveguide of 2 D photon crystal unit 1 is cephalocaudal direction, by multiple equipped with upper
State the magnetic control resonance based on 2 D photon crystal that the 2 D photon crystal unit 1 of structure is mutually connected to form a whole from beginning to end
Chamber switching mode ROADM, make entire ROADM more be miniaturized with it is integrated, change the ferrimagnetic of each 2 D photon crystal unit 1
The radius of volume defect dielectric posts 9 achieves that individual devices (i.e. 2 D photon crystal unit and all structures being arranged thereon) spy
Standing wave length is uploaded and is downloaded；After series connection, the frequency-selecting wave band of each device is not interfere with each other, and can be completed at the same time multiwave upload
With download, the Random route function of dwdm system C-band and L-band is realized.
In order to prove the creation of the magnetic control cavity switches type ROADM described in the utility model based on 2 D photon crystal
Property, it is specifically described with reference to mentality of designing, practical application and partial properties index：
1,2 D photon crystal basic structure design and specificity analysis：
1.1 determine medium column radius：
Variation relation of the normalized frequency with medium column radius is calculated according to plane wave expansion method, it is found that with passive
The increase of 2 radius of silicon dielectric posts, photonic crystal first band gap first increases and then decreases take the radius of passive silicon dielectric posts 2 to be
100nm helps to expand Two-dimensional Photonic Crystal, and the normalized frequency of corresponding the first forbidden photon band of TE patterns is
[0.267,0.392]a/ λ (value of lattice constant a takes 500), including the length of international mainstream is away from optical communications wavelength 1550nm, simultaneously
Cover O band [1260,1360] nm, E band [1360,1460] nm, S band [1460,1530] nm and C bands [1530,1565] nm.
The passive silicon dielectric posts 2 in 1.2 first magnetic control cavity switches regions 6,7 periphery of the second magnetic control cavity switches region
Influencing mechanism：
Divide three kinds of modes, mode one, in 3 × 3 the first magnetic control cavity switches region 6 and the second magnetic control cavity switches
The passive silicon dielectric posts 2 of four surroundings of the opposite center of selection up and down in region 7；Mode two, 3 × 3 first
In magnetic control cavity switches region 6 and the second magnetic control cavity switches region 7 around the quadrangle four of the opposite center of selection
Passive silicon dielectric posts 2；Mode three, in 3 × 3 the first magnetic control cavity switches region 6 and the second magnetic control cavity switches area
The passive silicon dielectric posts 2 for selecting opposite center to be partial to upper and lower road waveguide and be partial to around two of main waveguide outside domain 7.
Change the first magnetic control cavity switches region 6, passive silicon dielectric posts 2 around the second magnetic control cavity switches region 7 radius
[100,250] nm, the transmission spectrum of respective radius is found out using plane wave expansion method, compares and obtains first way and the third
Mode increases with the radius of passive silicon dielectric posts 2, and efficiency of transmission occurs declining and resonance wavelength is susceptible to multimode and shows
As this is because with light wave strong interaction can occur for the passive silicon dielectric posts 2 of this two ways.The second way, nothing
Source silicon dielectric posts 2 and light interaction are relatively weak, and in the suitably radius of adjustment passive silicon dielectric posts 2, projection effect can be improved
Rate keeps good unimodular property.Studies have shown that using the second way, the radius of periphery passive silicon dielectric posts 2 is 200nm
When, transmissivity is up to 90.44%.
The offset direction of 1.3 Ferrite defective media columns 9 and offset：
When comparing Ferrite defective media 9 translation feature of column, it is whole that discovery offsets downward the mode (close to main waveguide 3)
Body is better than the mode of offsetting up, and offset increases, and transmission peak value is distributed in concussion up and down, when offset is 200nm, can obtain
To max transmissive peak value.Continue to probe into mechanism of action, does the energy spectrometer of magnetic field and electric field, under this offset, electric field energy
It is mainly distributed in microcavity, the coupling between main waveguide 3 is apparent, and microcavity local energy is also effectively enhanced.Research
When showing that offset is 200nm, projection peak value is 89.11%.Ferrite in first magnetic control cavity switches region 6 lacks
Fall into Ferrite defective media of the dielectric posts 9 into the direction of main waveguide 3 offset 200nm, the second magnetic control cavity switches region 7
The direction of 9 upward road waveguide 5 of column deviates the Ferrite defective media column 9 in 200nm, reflection micro-cavitiy 8 to the side of main waveguide 3
When to offset 200nm, while both having can guarantee each microcavity high Local Characteristic, can also have higher light wave projection efficiency.
The radius of 1.4 Ferrite defective media columns 9：
Based on conditions above, the relationship of the radius and projection efficiency of research Ferrite defective media column 9.Defect is with iron oxygen
Magnet is as dielectric posts, and the radius of Ferrite defective media column 9 is [0.08,0.13a] nm, and region, radius increase here
When, Red Shift Phenomena occurs for microcavity interior resonance wavelength, i.e., is moved to long wavelength, and full width at half maximum value becomes larger, in S-band
(1460nm~1530nm), C-band (1530nm~1565nm) and L-band (1565nm~1625nm) projection efficiency exist
90% or more.Determine that magnetic imperfection medium column radius is 0.09a-0.12a nm.
2, upper and lower way switch characteristic：
Apply external magnetic field in the axial direction of three Ferrite defective media columns 9, modulation external magnetic field makes Ferrite lack
Fall into magnetic conductivity saltus step between 0.89 and 2.09 of dielectric posts 9.
Respectively the first magnetic control cavity switches region 6 μ 1, μ 2, μ 3, the second magnetic control cavity switches region 7, reflection are micro-
The magnetic conductivity of Ferrite defective media column 9 in chamber 8, it is as a result as follows：
1 time road function of table and upper road function correspond to magnetic conductivity
2.1 times road functions：
It opens：Iron oxygen in first magnetic control cavity switches region 6, the second magnetic control cavity switches region 7, reflection micro-cavitiy 8
The magnetic conductivity of magnet defective media column 9 is respectively 0.89,2.09 and 0.89, and magnetic control cavity switches are "On" state, main waveguide 3
The light wave of middle 1550nm is downloaded to the region of lower road waveguide 4, and with 1550nm light waves resonance, which occurs, for the microcavity on the downside of main waveguide rises
It is acted on to certain reflection feedback, improves the projection efficiency of lower road waveguide 4.Q values are 1033 at this time, insertion loss 0.0514.
It closes：Iron oxygen in first magnetic control cavity switches region 6, the second magnetic control cavity switches region 7, reflection micro-cavitiy 8
When the magnetic conductivity of magnet defective media column 9 is 2.09, magnetic control cavity switches are "Off" state, and lower road waveguide 4, which is cancelled, downloads
Function, the light wave of 1550nm is directly along main waveguide 3 almost without loss propagation in main waveguide 3.
Road function on 2.2：
It opens：Iron oxygen in first magnetic control cavity switches region 6, the second magnetic control cavity switches region 7, reflection micro-cavitiy 8
When the magnetic conductivity of magnet defective media column 9 is respectively 2.09,0.89 and 0.89, magnetic control cavity switches are "On" state, upper road
The light wave of 1550nm is uploaded to the region of main waveguide 3 in waveguide 5, and the microcavity of 3 downside of main waveguide and the generation of 1550nm light waves are humorous
It shakes toward the light reflection that left side is propagated to right side, the right side that the roads Shi Shang optical signal gathers main waveguide 3 is propagated.
It closes：Iron oxygen in first magnetic control cavity switches region 6, the second magnetic control cavity switches region 7, reflection micro-cavitiy 8
When the magnetic conductivity of magnet defective media column 9 is 2.09, magnetic control cavity switches are "Off" state, and lower road waveguide 4, which is cancelled, downloads
Function, the light wave of 1550nm is directly along main waveguide 3 almost without loss propagation in main waveguide 3.
3, magnetic control cavity switches type ROADM performance indicators：
2 magnetic control cavity switches type ROADM performance indicators of table
As shown in Table 2, the ROADM designed by the application, when descending road function in realization, Q values are up to 103, it is inserted into damage
Consumption is respectively 0.0514 and 0.0223, and isolation is respectively 32.17 and 38.59, and mutually crosstalk is small between channel, and transmissivity exists
90% or more.
Above-described embodiment is the preferred embodiment of the utility model, is not the limit to technical solutions of the utility model
System, as long as without the technical solution that creative work can be realized on the basis of the above embodiments, is regarded as falling into
In the rights protection scope of the utility model patent.
Claims (7)
1. a kind of magnetic control cavity switches type ROADM based on 2 D photon crystal, it is characterised in that：Including photonic crystal lattice
The 2 D photon crystal unit that constant is a nm, passive silicon medium column radius is b nm, on the 2 D photon crystal unit
Lower road waveguide that the main waveguide that is formed equipped with a longer line defect, a shorter line defect are formed, a shorter line
The upper road waveguide of defect formation, a center remove the first magnetic control resonant cavity that the corresponding passive silicon dielectric posts are formed
Switch region, a center remove the second magnetic control cavity switches region that the corresponding passive silicon dielectric posts are formed,
One center removes the reflection micro-cavitiy that the corresponding passive silicon dielectric posts are formed, the lower road waveguide and the upper road wave
It leads and is mutually parallel and is mutually perpendicular to simultaneously with the main waveguide, the first magnetic control cavity switches region is set to the main waveguide
Between the lower road waveguide, the second magnetic control cavity switches region be set to the main waveguide and the upper road waveguide it
Between, the reflection micro-cavitiy is set between the first magnetic control cavity switches region and the second magnetic control cavity switches region
Center and the other side positioned at the main waveguide, in the first magnetic control cavity switches region, second magnetic control
In cavity switches region and it is respectively equipped with a Ferrite defective media column in the reflection micro-cavitiy.
2. the magnetic control cavity switches type ROADM according to claim 1 based on 2 D photon crystal, it is characterised in that：
Positioned at four passive silicon dielectric posts of quadrangle and the second magnetic control resonance in the first magnetic control cavity switches region
The radius of four passive silicon dielectric posts in chamber switch region positioned at quadrangle is 2b nm.
3. the magnetic control cavity switches type ROADM according to claim 2 based on 2 D photon crystal, it is characterised in that：
The Ferrite defective media column in the first magnetic control cavity switches region is located at center to the main waveguide
The position of 2b nm is deviated, the Ferrite defective media column in the second magnetic control cavity switches region is located at center
Position deviates the position of 2b nm to the upper road waveguide.
4. the magnetic control cavity switches type ROADM according to claim 3 based on 2 D photon crystal, it is characterised in that：
The Ferrite defective media column in the reflection micro-cavitiy is located at center to the position of the main waveguide offset 2b nm
It sets.
5. the magnetic control cavity switches type ROADM according to claim 1 based on 2 D photon crystal, it is characterised in that：
The radius of the Ferrite defective media column is 0.09a-0.12a nm, and wherein a is the value of photonic crystal lattice constant.
6. the magnetic control cavity switches type ROADM based on 2 D photon crystal according to any one of claim 1-5,
It is characterized in that：The a is 500, and the b is 100.
7. the magnetic control cavity switches type ROADM based on 2 D photon crystal according to any one of claim 1-5,
It is characterized in that：If the axial direction of the corresponding line defect of main waveguide of the 2 D photon crystal unit is cephalocaudal direction, the base
In the magnetic control cavity switches type ROADM of 2 D photon crystal include the 2 D photon crystal list of multiple mutual head and the tail connections
Member.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669239A (en) * | 2019-01-04 | 2019-04-23 | 深圳大学 | A kind of orthogonal division Mode interference FANO resonant structure of photonic crystal waveguide |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669239A (en) * | 2019-01-04 | 2019-04-23 | 深圳大学 | A kind of orthogonal division Mode interference FANO resonant structure of photonic crystal waveguide |
| CN109669239B (en) * | 2019-01-04 | 2020-10-02 | 深圳大学 | Orthogonal splitting mode interference FANO resonance structure of photonic crystal waveguide |
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