CN1184753C - New-type photon crystal wavelength division multiplex device - Google Patents
New-type photon crystal wavelength division multiplex device Download PDFInfo
- Publication number
- CN1184753C CN1184753C CNB011239573A CN01123957A CN1184753C CN 1184753 C CN1184753 C CN 1184753C CN B011239573 A CNB011239573 A CN B011239573A CN 01123957 A CN01123957 A CN 01123957A CN 1184753 C CN1184753 C CN 1184753C
- Authority
- CN
- China
- Prior art keywords
- defective
- photon crystal
- ripple
- wavelength division
- division multiplex
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The present invention relates to a wavelength division multiplexing device of microwaves and optical waves, particularly to a wave demultiplexing or multiplexing device of optical waves. By leading a vacancy or a micro cavity in a two-dimensional or three-dimensional photonic crystal, the present invention uses the resonant coupling action of the micro cavity and the symmetric optical path design to improve the service efficiency of the device. The design principle of the present invention is simple, and the time of a simulation process and an optimizing process are greatly reduced. Because the structure of the device is symmetric, the number of wavelength division multiplexing channels is easy to increase. The efficiency of the device for both wave demultiplexing and multiplexing is high, and the loss is small.
Description
Technical field
The present invention relates to the wavelength division multiplex device of a kind of microwave and light wave, particularly relate to the light wave ripple and separate usefulness and ripple multiplexing device.
Background technology
In optical-fibre communications, the signal of optical fiber in can the carry electrode wide frequency ranges, therefore how the unlike signal that different frequency is carried couples light in the optical fiber, reach the entrained signal of ripple of the different frequency that how to extract the optical fiber transmission, just become an important research direction expanding the optical-fibre communications capacity, promptly so-called wavelength-division multiplex technique.
Photonic crystal is the artificial crystal that is formed by two or more medium period arrangement.Exist photon band gap in the photon band structure of photonic crystal, when the frequency of photon was in photon band gap, photon can not be propagated along any direction in photonic crystal.Yet when introducing defective in photonic crystal, just may introduce a defective mould in photon band gap, photonic crystal just can be used for aspects such as filter like this.Recently existing document (document 1, S.Fan, P.villenuve, and J.D.Joannopoulos, by the raceway groove decline tunnelling of local attitude, physical comment bulletin, 80 volumes, 960 (1998)) report, the ripple that forms photonic crystal by raceway groove decline tunnelling (Channel drop tunneling) method is separated with device (as shown in Figure 1).Have a coupler in the middle of photon crystal wave-guide 1 and 2, by this coupler, when having light wave to pass through in the waveguide 1, this coupler can be f with a centre frequency wherein
1The light wave of utmost point narrow-band transfer to the waveguide 2 forward from waveguide 1 and propagate.Can be f so just with frequency
1Light from waveguide 1, separate.Repeating this process, the light of all different frequencies can be separated from waveguide 1, thus realized that ripple separates the function with device.Yet there is shortcoming in this separating with process with raceway groove decline tunnelling realization ripple: in order to make the frequency in waveguide 1 is f
1Light be tunneling to fully in the waveguide 2, be used for the cavity that the coupling unit of tunnelling process must contain more than two and just can reach higher tunnelling efficient, make the design of whole system like this and make very complicated.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, propose a kind of photonic crystal ripple of wavelength division multiplexing function of realizing and separate usefulness and ripple multiplexing device, by introducing defective or microcavity, utilize the resonance coupling effect of microcavity and the light path design of symmetry, improved the service efficiency of device.
The object of the present invention is achieved like this: separate for ripple and use device, according to the Mode Coupling principle, before and after the defective C of photonic crystal, introduce two waveguides 1 and 2 (as shown in Figure 2), the light wave that enters by waveguide 1, only on the frequency of defective mould, could pass through the resonance coupling of defective (or microcavity), be coupled to fully in the waveguide 2.Just finished the leaching process of a certain single narrow-band like this to waveguide 2 through the direct resonance coupling of microcavity by waveguide 1.If this unit (containing different microcavitys) continues combination, just can be separately with different frequencies.For the various combination of this unit, the efficient that ripple is separated usefulness is different.In order to improve the efficient that leaches of all wave bands as much as possible, make all microcavitys (or defective) with respect to incident waveguide symmetry.As shown in Figure 3, A represents to constitute the dielectric cylinder " atom " of 2 D photon crystal; C3 and C4 remove the defective (or microcavity) that introduce " atom " back on the lattice lattice point of primary photon crystal; The wavelength of the defective mould that these defectives are introduced is respectively λ
3And λ
4Be respectively λ when containing wavelength
3And λ
4Incident wave when the incident waveguide enters in the photonic crystal, through with the resonance coupling of C3, C4, λ
3And λ
4Just come out from upper and lower two waveguide mouths respectively, finished the function of separating different frequency.This is that the simplest a kind of photonic crystal ripple is separated and used device.Wherein key is to have utilized the resonance coupling effect of microcavity; This two-way light path symmetry of while, promptly defective is in full accord to the path of light wave inlet.This structure can make these two to leach wave band and reach peak efficiency, and is promptly consistent from the efficient that inlet is coupled to respective straight waveguide (as shown in Figure 4) with light wave.This moment, ripple was separated the efficient of usefulness near 100%.
Same principle also can be designed to separate more than many ripples to channel of a pair of channel and use device.
For the ripple multiplexing device, also use same principle and design.At this moment, the defective of introducing is a micro-cavity laser independently one by one.By adjusting microcavity mode volume size, make microcavity give off the laser of different frequency.The different laser of these frequencies is pooled to (as shown in Figure 7) on total photon crystal wave-guide through different paths.Wherein C5 and C6 are two micro-cavity lasers, and the wavelength of generation is respectively λ
5And λ
6Laser through the outlet of different paths converge to photonic crystal ripple multiplexing device.
As required, can design equally more than a pair of many ripple multiplexing devices that micro-cavity laser is formed.
Wavelength division multiplex device of the present invention can be realized on two dimension or three-D photon crystal.
The design principle of photon crystal wavelength division multiplex device of the present invention is simple; Time and preferred process that simulation process is used dwindle greatly; Owing to this device architecture symmetry, be easy to increase the channel number of wavelength division multiplexing; No matter be that ripple is separated usefulness, or the efficient of ripple multiplexing device is all very high, loss is little.
Description of drawings
Fig. 1: a kind of photonic crystal ripple is separated and is used the device schematic diagram;
Fig. 2: wavelength division multiplex device principle;
The 2 D photon crystal ripple of Fig. 3: embodiment 1 is separated and is used device sectional view;
Fig. 4: corresponding to the photonic crystal straight wave guide of Fig. 3;
Fig. 5: ripple shown in Figure 3 is separated the power spectrum with the power spectrum of each waveguide of device outlet and waveguide shown in Figure 4;
Fig. 6: ripple is separated the efficient of usefulness, and wherein a is a lattice constant;
Fig. 7: the schematic diagram of ripple multiplexing device;
The 2 D photon crystal ripple of Fig. 8: embodiment 2 is separated and is used device sectional view;
Fig. 9: photonic crystal ripple shown in Figure 8 is separated the efficient with device;
Figure 10: the photonic crystal ripple that has 16 path channels is separated and is used the device architecture schematic diagram;
Figure 11: the photonic crystal ripple multiplexing device structural representation that has 16 path channels.
Wherein: 1,2,3,4 ... the expression photon crystal wave-guide; A represents to constitute the dielectric cylinder of photonic crystal; C, C1, C2, C3, C4 ..., C42 is illustrated in defective or the microcavity in the photonic crystal; λ
1, λ
2, λ
3..., λ
42The light of expression different wave length.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples:
Embodiment 1:
Fig. 3 is that ripple with two channels is separated and used device, and wherein A represents to constitute the dielectric cylinder " atom " of 2 D photon crystal; C3 and C4 are the defectives of introducing (microcavity).The wavelength of the defective mould that these defectives are introduced is respectively λ
3And λ
4Be respectively λ when containing wavelength
3And λ
4Incident wave in photon crystal wave-guide enters photonic crystal the time, through and the resonance coupling of C3, C4, λ
3And λ
4Just come out from upper and lower two waveguide mouths respectively, promptly finished the function of separating different frequency.Here it is, and the simplest a kind of photonic crystal ripple separates uses device.This two-way light path is symmetrical, and promptly defective is to the path unanimity of light wave inlet.When placing a line source in the waveguide porch of Fig. 3 and Fig. 4 respectively, light wave will coupled into waveguide, and each port of export in waveguide will detect the signal that light wave passes through so.Fig. 5 utilizes the multiple scattering method to calculate the spectral distribution of each port of export of gained.The radius that wherein constitutes the dielectric cylinder of 2 D photon crystal is 0.1858 times of lattice constant of photonic crystal, and dielectric constant is 8.9, and the dielectric constant of surrounding medium is 1.04.The radius of two defective C3 that introduce and the dielectric cylinder of C4 is 0.3545 times of lattice constant, and dielectric constant is respectively 6.0 and 7.0.The peak-peak of each port of export under Fig. 3 structure is identical with the energy size of corresponding straight wave guide (see figure 4) at this moment.With the power normalization C3 of the straight wave guide port of export, the power of the C4 port of export, just can obtain the efficient that ripple is separated usefulness.As shown in Figure 6, ripple is separated the efficient of usefulness near 100% as can be known.
Embodiment 2:
Fig. 8 is that the ripple with 4 channels is separated the structural representation of using device, similar embodiment 1, and it can separate the light wave of 4 different frequency bands equally.Wherein C7, C8, C9 and C10 are the defectives of introducing, and their defective mould corresponds respectively to λ
7, λ
8, λ
9And λ
10Under two-dimensional case, this photonic crystal is exactly a kind of photonic crystal of square lattice.Stain is wherein represented the dielectric cylinder, and represents another kind of dielectric cylinder on every side.The radius of selecting the dielectric cylinder is 0.1858 times of lattice constant, and dielectric constant is 8.4, and the dielectric constant of surrounding medium is 1.04.The radius of the dielectric cylinder of four defective C7, C8, C9 and C10 that introduced is 0.3545 times of lattice constant, and dielectric constant is respectively 5.7,6.5,7.0,4.5.Use the multiple scattering method, can obtain as shown in Figure 9 ripple and separate and use efficient.Show under the design principle of this symmetrical structure, can obtain big ripple and separate and use efficient.
Embodiment 3:
Design a ripple with 16 channels and separate with device (as shown in figure 10), the defective of 16 symmetries constitutes the ripple of 16 tunnel symmetries and separates the path of usefulness.Wherein C11, C12, C13 ..., C26 is the defective that has nothing in common with each other, and constitutes 16 defect states, the centre frequency of these defect states is respectively λ
11, λ
12, λ
13..., λ
26So just can detect the signal of 16 road different frequencies from the port of export respectively.This structure can be two-dimentional, also can be three-dimensional, can also extend to 32 the tunnel, the 64 tunnel easily, even more path.And very simple on the structural design, promptly follow symmetry principle, make the direct coupling efficiency of all paths the highest.
Embodiment 4:
Figure 11 is the ripple multiplexing device structural representation that can produce 16 road different frequency signals.Wherein C27, C28 ... and C42 is 16 defectives, and they form 16 micro-cavity lasers respectively.Producing wavelength respectively is λ
27, λ
28, λ
29..., λ
42The laser that is loaded with signal, the light of these different frequencies is through the outlet of different paths converge to device, thereby can be coupled in the optical fiber, grows Distance Transmission, uses device through separating as embodiment 3 described ripples at last, restores 16 tunnel different signals.This ripple multiplexing device can be realized in two-dimentional or three-dimensional photonic crystal.
Claims (3)
1. photon crystal wavelength division multiplex device is characterized in that: comprise that ripple separates with device and ripple multiplexing device, this two device is all introduced defective or microcavity in 2 D photon crystal, and the light path symmetric design;
Its medium wave separate with device comprise constitute 2 D photon crystal dielectric cylinder " atom " (A), on the lattice lattice point of primary photon crystal, remove " atom " (A) first defective (C3) and second defective (C4) of introducing of back; First defective (C3), second defective (C4) are introduced defective mould (λ respectively
3, λ
4), make first defective (C3), second defective (C4) with respect to incident waveguide symmetry, when containing defectiveness mould (λ
3, λ
4) incident wave when the incident waveguide enters in the photonic crystal, through with the resonance coupling of first defective (C3), second defective (C4), defective mould (λ
3, λ
4) just come out from upper and lower two waveguide mouths respectively;
The ripple multiplexing device comprises first micro-cavity laser (C5) and second micro-cavity laser (C6) independently independently of the defective of introducing, by adjusting the size of microcavity mode volume, make first independently micro-cavity laser (C5), second independently micro-cavity laser (C6) give off the laser of different frequency, the different laser of this frequency through paths converge different, symmetry to total photon crystal wave-guide.
2. by the described photon crystal wavelength division multiplex device of claim 1, it is characterized in that: described wavelength division multiplex device can also be realized on three-D photon crystal.
3. by the described photon crystal wavelength division multiplex device of claim 1, it is characterized in that: described ripple is separated with the light path in device, the ripple multiplexing device and is the tree of two bifurcateds step by step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011239573A CN1184753C (en) | 2001-08-08 | 2001-08-08 | New-type photon crystal wavelength division multiplex device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011239573A CN1184753C (en) | 2001-08-08 | 2001-08-08 | New-type photon crystal wavelength division multiplex device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1400749A CN1400749A (en) | 2003-03-05 |
| CN1184753C true CN1184753C (en) | 2005-01-12 |
Family
ID=4665392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011239573A Expired - Fee Related CN1184753C (en) | 2001-08-08 | 2001-08-08 | New-type photon crystal wavelength division multiplex device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1184753C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025431A (en) * | 2019-12-11 | 2020-04-17 | 深圳市光科全息技术有限公司 | Three-dimensional photonic crystal and application thereof |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4063740B2 (en) * | 2003-08-29 | 2008-03-19 | 国立大学法人京都大学 | Two-dimensional photonic crystal having air bridge structure and manufacturing method thereof |
| US6996317B2 (en) * | 2003-10-23 | 2006-02-07 | Fitel U.S.A. Corp. | Optical devices including microstructured fiber sections disposed for transverse signal propagation |
| DE60328835D1 (en) * | 2003-12-05 | 2009-09-24 | 3M Innovative Properties Co | PROCESS FOR PREPARING PHOTONIC CRYSTALS |
| JP3881666B2 (en) * | 2004-03-25 | 2007-02-14 | 国立大学法人京都大学 | Photonic crystal having heterostructure and optical device using the same |
| CN100403605C (en) * | 2004-06-22 | 2008-07-16 | 中国科学院光电技术研究所 | Continuous light-beam frequency multiplier with photon crystal of linear material |
| JP4900572B2 (en) * | 2006-03-20 | 2012-03-21 | 国立大学法人京都大学 | 2D photonic crystal |
| CN100504470C (en) * | 2006-10-13 | 2009-06-24 | 中国科学院物理研究所 | Photon crystal filter with high resolution |
| CN101252407B (en) * | 2008-04-03 | 2011-02-09 | 上海交通大学 | Wave decomposing multiplexer based on two-dimension photon crystal |
| CN102722000B (en) * | 2012-07-16 | 2014-07-16 | 北京邮电大学 | Method for implementing microwave photonic filter based on photonic crystal |
| CN103905139B (en) * | 2012-12-25 | 2017-04-26 | 深圳大学 | Reconfigurable add-drop multiplexer and signal add drop multiplexing method |
| CN104466674B (en) * | 2014-12-03 | 2017-07-14 | 中国科学院长春光学精密机械与物理研究所 | Integrated conjunction beam laser and preparation method thereof on piece based on photonic crystal Y waveguide |
-
2001
- 2001-08-08 CN CNB011239573A patent/CN1184753C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025431A (en) * | 2019-12-11 | 2020-04-17 | 深圳市光科全息技术有限公司 | Three-dimensional photonic crystal and application thereof |
| CN111025431B (en) * | 2019-12-11 | 2021-08-10 | 深圳市光科全息技术有限公司 | Three-dimensional photonic crystal and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1400749A (en) | 2003-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1184753C (en) | New-type photon crystal wavelength division multiplex device | |
| Martinez et al. | Ultrashort 2-D photonic crystal directional couplers | |
| Pashamehr et al. | All-optical AND/OR/NOT logic gates based on photonic crystal ring resonators | |
| CN102171596A (en) | Uncoupled multi-core fiber | |
| Robinson et al. | Photonic crystal ring resonator based add-drop filter using hexagonal rods for CWDM systems | |
| Kannaiyan et al. | Investigation of 2D-photonic crystal resonant cavity based WDM demultiplexer | |
| CN113484952B (en) | Three-dimensional hybrid multiplexing signal all-optical wavelength conversion device on silicon substrate | |
| CA2456515A1 (en) | Two-dimensional photonic crystal cavity and channel add/drop filter | |
| Talebzadeh et al. | Improved low channel spacing high quality factor four-channel demultiplexer based on photonic crystal ring resonators | |
| CN105137623A (en) | Wavelength division demultiplexer based on photonic crystal non-commutative unidirectional waveguide | |
| CN102354022B (en) | Wavelength and polarization directional coupler based on nanowire waveguides and manufacturing method thereof | |
| JP5773521B2 (en) | Mode multiplexer / demultiplexer, optical transceiver, and optical communication system | |
| CN101252407B (en) | Wave decomposing multiplexer based on two-dimension photon crystal | |
| CN102116905A (en) | Two-dimensional photonic crystal four-wavelength division multiplexer based on multiple-mode interference | |
| CN1715996A (en) | Photon crystal ratio light intensity light splitter | |
| CN102141651A (en) | Optical multiplexer/demultiplexer integrated based on surface plasmas and preparation method thereof | |
| CN101840024A (en) | Polarization channel drop filter based on two-dimensional photonic crystal | |
| CN105911646A (en) | Wavelength division die division mixing multiplexing demultiplexer based on photonic crystal and method thereof | |
| Haxha et al. | Analysis of wavelength demultiplexer based on photonic crystals | |
| Della Valle et al. | Graded index surface-plasmon-polariton devices for subwavelength light management | |
| CN108663748B (en) | Dual-channel drop filter based on single line defect resonant cavity | |
| Rakhshani et al. | Design and optimization of photonic crystal triplexer for optical networks | |
| Bounaas et al. | New design of an optical diplexer based on Core-shell rods defect in photonic-crystal | |
| US7433562B2 (en) | Method of dividing a guided electromagnetic signal into two half-power signals using photonic crystals | |
| CN106094119A (en) | Three pattern mode division multiplexing and demultiplexers based on photonic crystal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050112 Termination date: 20090908 |