CN208621788U - Eight microcavity wavelength division multiplexer of Fourth Ring - Google Patents
Eight microcavity wavelength division multiplexer of Fourth Ring Download PDFInfo
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- CN208621788U CN208621788U CN201821498142.5U CN201821498142U CN208621788U CN 208621788 U CN208621788 U CN 208621788U CN 201821498142 U CN201821498142 U CN 201821498142U CN 208621788 U CN208621788 U CN 208621788U
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Abstract
The utility model discloses a kind of eight microcavity wavelength division multiplexers of Fourth Ring, which is characterized in that including substrate, photonic crystal, input waveguide, output waveguide, annular chamber and point microcavity, multiple photonic crystals in triangular crystal lattice structure stationary distribution on the substrate；The input waveguide is arranged on the axis of the substrate, and eight output waveguides are divided into two groups and are separately positioned on the two sides of the axis；Four annular chambers and eight described microcavitys are divided into two groups and are separately positioned on the two sides of the axis, and the output waveguide is arranged in described microcavity；The loss of eight microcavity wavelength division multiplexer optical signal of the utility model Fourth Ring is low, and transmitance is high, and the loss of intracavitary optical power is lower, and coupling efficiency is very high, and 3. annular chambers have the characteristic of multiple multiple wavelength of screening, and output light monochromaticjty is strong.
Description
Technical field
The utility model relates to eight microcavity wavelength division multiplexers of optical communication field more particularly to a kind of Fourth Ring.
Background technique
1987, S.John and E.Yablonovitch has been put forward for the first time the concept of photonic crystal.Photonic crystal is a kind of high
Regular optical texture is tieed up, the density (photonic of device internal photon state can be changed by changing its arrangement mode
Density of states), to control the spontaneous radiation of substance in photonic crystal.
Since photonic crystal has photonic band structures, the dispersion of light wave in the photonic crystal will be by local in banded structure
In, periodic dielectric structures are presented, the light or electromagnetic wave for falling in frequency in forbidden band can not be propagated, to realize photonic crystal
Array acts on the local of light on two-dimensional surface.
In the micron-scale due to photonic crystal volume, it is widely used in nanotechnology, the fields such as optical computer, chip.Light
Sub- crystal can also be in conjunction with multinomial technology, such as manufactures photonic crystal fiber, Surface enhanced Raman spectroscopy etc..It has good
Transmission characteristic, higher sensitivity, and then many forward positions and the crossing domain such as be applied to communication, biology.
Photonic crystal point microcavity can realize very high quality factor in the cavity mold volume of a very little, therefore photon is brilliant
Body microcavity has very important application value in micro-optics circuit.Since photon crystal micro cavity is in resonance, intracavitary storage
Huge energy, therefore intracavitary resonant rod must there is the gradient forces as caused by energy density.By the way that luminous power is introduced
Photon crystal micro cavity can be to the change of intracavitary state, to realize full optical modulation.It is sharp by way of opto-mechanical force effect
With the method for light-operated light realize nanocomposite optical original part function ratio by the conventional methods such as nonlinear effect come it is effective.
Utility model content
The purpose of this utility model is that solve the above-mentioned problems and provides a kind of eight microcavity wavelength division multiplexer of Fourth Ring.
The utility model achieves the above object through the following technical schemes:
A kind of eight microcavity wavelength division multiplexer of Fourth Ring characterized by comprising
Substrate and photonic crystal, multiple photonic crystals in triangular crystal lattice structure stationary distribution on the substrate；
Input waveguide and output waveguide, the input waveguide are arranged on the axis of the substrate, and eight outputs
Waveguide is divided into two groups and is separately positioned on the two sides of the axis；
Annular chamber and point microcavity, four annular chambers and eight described microcavitys are divided into two groups and are separately positioned on described
The two sides of axis, the output waveguide are arranged in described microcavity；
Two annular chambers, four described microcavitys and four output waves of described axis the same side will be set
It leads and is defined as the first frequency-selecting component, point described in other two described annular chamber of the axis other side, four additional is micro-
Chamber, output waveguide described in four additional are defined as the second frequency-selecting component.
Specifically, the first frequency-selecting component and the second frequency-selecting component are arranged in axile displacement, and axile displacement away from
From for 2 lattice constants；
Four described microcavitys in the first frequency-selecting component are arranged in parallel, and the input direction with the input waveguide
Angle be acute angle, the distance between two adjacent described microcavitys are 6 lattice constants, and the output waveguide is arranged in institute
The outer end of a microcavity is stated, and the distance between two adjacent described output waveguides are 4 lattice constants, the annular chamber setting
Between described microcavity and the axis, the distance between two described annular chambers are 6 lattice constants；
Four described microcavitys in the second frequency-selecting component are arranged in parallel, and the input direction with the input waveguide
Angle be acute angle, the distance between two adjacent described microcavitys are 6 lattice constants, and the output waveguide is arranged in institute
The outer end of a microcavity is stated, and the distance between two adjacent described output waveguides are 4 lattice constants, the annular chamber setting
Between described microcavity and the axis, the distance between two described annular chambers are 6 lattice constants.
Specifically, the photonic crystal period a=0.56nm, stating photonic crystal is the dielectric posts that dielectric constant is 11.56,
The photonic crystal medium column radius is 0.2*a, and the cross-sectional shape of the dielectric posts is round, ellipse, triangle or more
Side shape, the photon crystal structure background packing material and intracavitary packing material are the air dielectric that dielectric constant is 1, described
Annular chamber is hexagonal annular structure；
Specifically, the two-dimensional of the wavelength division multiplexer is 18 μm of 22 μ m.
The utility model has the beneficial effects that:
The loss of eight microcavity wavelength division multiplexer optical signal of the utility model Fourth Ring is low, and transmitance is high, the damage of intracavitary optical power
Consume lower, coupling efficiency is very high, and isolation is high.Annular chamber has the characteristic for screening multiple wavelength, and point microcavity has screening monochromatic
The monochromaticjty of the characteristic of wavelength, output light is good.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of eight microcavity wavelength division multiplexer of Fourth Ring described in the utility model；
Fig. 2 is the normalization resonance spectrum figure of four annular chambers described in the utility model；
Fig. 3 is the intrinsic frequency of the corresponding annular chamber of 0.2 μm of the annular chamber medium column radius r=0.06；
Fig. 4 is the component frequency of 0.156 μm of annular chamber medium column radius r=0.144 of the linear response；
Fig. 5 is the relationship of described microcavity medium column radius and its intrinsic normalized frequency；
Fig. 6 is the red shift spectrogram that the absorption peak of described microcavity increases with radius；
Fig. 7 is intrinsic frequency of the described microcavity medium column radius at 0.05 μm of r=0.03；
Fig. 8 is intrinsic frequency of the described microcavity medium column radius at 0.18 μm of r=0.16；
Fig. 9 is described microcavity quality factor and the relationship for putting microcavity central medium column radius；
Figure 10 is eight channel transmitances of the utility model wavelength division multiplexer；
Figure 11 is the channel transmitance logarithmic coordinates spectrogram of the utility model wavelength division multiplexer；
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
As shown in Figure 1, a kind of eight microcavity wavelength division multiplexer of Fourth Ring of the utility model, which is characterized in that including substrate 1, light
Sub- crystal 2, input waveguide 3, output waveguide 7, annular chamber 4 and point microcavity 6, multiple photonic crystals 2 are fixed in triangular crystal lattice structure
On substrate 1, input waveguide 3 is arranged on the axis of substrate 1, and eight output waveguides 7 are divided to for two groups and are respectively set for distribution
In the two sides of axis, four annular chambers 4 and eight for two groups and are separately positioned on the two sides of axis, output waveguide 7 in microcavity 6 minutes
It is arranged in microcavity 6, A, B, C, D, E, F, G, H are the code name of eight output waveguides, and photonic crystal 2 is for dielectric constant
11.56 dielectric posts, the cross-sectional shape of dielectric posts are round, oval, triangle or polygon, 2 structure of photonic crystal back
Scape packing material and intracavitary packing material are the air dielectric that dielectric constant is 1, and annular chamber 4 is hexagonal annular structure, wavelength-division
The two-dimensional of multiplexer is 18 μm of 22 μ m.
Two annular chambers, 4, four microcavitys 6 that axis the same side is arranged in and four output waveguides 7 are defined as first
Frequency-selecting component, by other two annular chamber 4 of axis other side, four additional point microcavity 6, four additional output waveguide 7 is fixed
Justice is that the second frequency-selecting component, the first frequency-selecting component and the second frequency-selecting component are arranged in axile displacement, and axile displacement distance is 2
Lattice constant；
Four microcavitys 6 in first frequency-selecting component are arranged in parallel, and are sharp with the angle of the input direction of input waveguide 3
Angle, the distance between adjacent two microcavitys 6 are 6 lattice constants, and the outer end of a microcavity 6, and two are arranged in output waveguide 7
The distance between a adjacent output waveguide 7 is 4 lattice constants, and annular chamber 4 is arranged between microcavity 6 and axis, two
The distance between annular chamber 4 is 6 lattice constants；
Four microcavitys 6 in second frequency-selecting component are arranged in parallel, and are sharp with the angle of the input direction of input waveguide 3
Angle, the distance between adjacent two microcavitys 6 are 10 lattice constants, and the outer end of a microcavity 6 is arranged in output waveguide 7, and
The distance between two adjacent output waveguides 7 are 4 lattice constants, and annular chamber 4 is arranged between microcavity 6 and axis, two
The distance between a annular chamber 4 is 6 lattice constants.
Monitor 5 is provided in four annular chambers 4
The working principle of eight microcavity wavelength division multiplexer of the utility model Fourth Ring is as follows:
This device intercepts linear region wavelength near 1.55 μm of communication wavelengths, in 1.54 μm of 1.57 μm of adjustable ranges, really
4 intrinsic frequency of annular chamber carries out frequency matching with annular chamber 4 as benchmark point of adjustment microcavity 6.Quality factor q > 3000,
Isolation < -25dB, insertion loss < 20% in all channels.
Analogue simulation is carried out to the device with Fdtd Method, obtains the transmission spectrum of each output port.Transmission
Spectral limit is wider relative to market wavelength division multiplexer, is conducive to the output of Single wavelength.
It is acted on using local of 2 array of photonic crystal to light, the absorption for reducing light in the device inside scatters, and includes
The incident light of multiple frequencies is incident from optical signal input mouth, and different frequency ingredient is coupled into four annular chambers 4 respectively, can be with
Multiple single-wavelength light signal outputs are carried out simultaneously.
Insertion loss isPoFor output power, PiFor input power
Channel isolation meets formulaP0For specific frequency light wave power in channel；P1For other
Light wave power the sum of of each path leakage to this channel.
Transmission characteristic such as Fig. 2 for single pulse of four annular chambers 4, wherein UL is the resonant frequency of upper left annular chamber
Spectrum, the upper right annular cavity resonant frequency of UR are composed, and left annular cavity resonant frequency spectrum, DR are lower right annular cavity resonant frequency spectrum under DL；
4 central medium radius of annular chamber and the intrinsic normalized frequency of the ring resonator at 0.156 μm of r=0.144 at
Preferable linear relationship can adjust ring resonator by control 4 central medium column radius of annular chamber in the linear region
Intrinsic frequency, as shown in Figure 3 and Figure 4；
This experiment uses some 6 radiuses of microcavity for 0.05 μm of r=0.03 of part, and normalized frequency is 0.67 0.62 μm-1,
Corresponding to 1.55 mu m waveband of third communication window of telecommunications, the corresponding eight 6 medium column radius of microcavity of Fig. 5, Fig. 6, Fig. 7, Fig. 8
Change the influence to its corresponding absorption normalized frequency, Fig. 6 is full wave normalized frequency relationship, and Fig. 6 is point microcavity 6
Red shift map, Fig. 7, Fig. 8 correspond respectively to 0.05 μm and 0.18 μm of r=0.16 of point defect microcavity radius r=0.03 progress
Interception.
Fig. 9 is the quality factor of point microcavity 6, and Figure 10 is the channel transmitance of wavelength division multiplexer, and Figure 11 is wavelength division multiplexer
The spectral response under dB scale,
Following table is the channel isolation in each channel of wavelength division multiplexer
Following table is that wavelength division multiplexer corresponds to the annular chamber of different wave length and the structural relation of point microcavity medium column
From the point of view of technically, input optical signal loss is low, and transmitance is high, achievees the effect that actual use, puts the product of microcavity 6
Prime factor is high, and the loss of intracavitary optical power is lower, and coupling efficiency is very high, and annular chamber 4 has the characteristic of multiple multiple wavelength of screening,
Output light monochromaticjty is strong.
Each interport isolation is higher, can almost not have to consider that respective port can occur mutually to harass in actual use
The case where, this device output end mouth is more, output light that can export 8 higher-wattages simultaneously, that frequency content is pure.
When annular chamber 4 is coupled with the resonant frequency light wave in input waveguide, there are strong time integral effects, make light
Wave persistently resonates, and is coupled into annular chamber, using the accurate screening of microcavity 6, available high peak power power,
The pure output light of frequency content.
The limitation that the technical solution of the utility model is not limited to the above specific embodiments, all skills according to the present utility model
The technology deformation that art scheme is made, each falls within the protection scope of the utility model.
Claims (4)
1. a kind of eight microcavity wavelength division multiplexer of Fourth Ring characterized by comprising
Substrate and photonic crystal, multiple photonic crystals in triangular crystal lattice structure stationary distribution on the substrate；
Input waveguide and output waveguide, the input waveguide are arranged on the axis of the substrate, and eight output waveguides
It is divided into two groups and is separately positioned on the two sides of the axis；
Annular chamber and point microcavity, four annular chambers and eight described microcavitys are divided into two groups and are separately positioned on the axis
Two sides, the output waveguide is arranged in described microcavity；
Two annular chambers that described axis the same side is arranged in, four described microcavitys and four output waveguides are determined
Justice is the first frequency-selecting component, will put microcavity described in other two described annular chamber of the axis other side, four additional, separately
Outer four output waveguides are defined as the second frequency-selecting component.
2. eight microcavity wavelength division multiplexer of Fourth Ring according to claim 1, it is characterised in that: the first frequency-selecting component and institute
It states the second frequency-selecting component to be arranged in axile displacement, and axile displacement distance is 2 lattice constants；
Four described microcavitys in the first frequency-selecting component are arranged in parallel, and the folder with the input direction of the input waveguide
Angle is acute angle, and the distance between two adjacent described microcavitys are 6 lattice constants, and the output waveguide is arranged in the point
The outer end of microcavity, and the distance between two adjacent described output waveguides are 4 lattice constants, the annular chamber is arranged in institute
It states between a microcavity and the axis, the distance between two described annular chambers are 6 lattice constants；
Four described microcavitys in the second frequency-selecting component are arranged in parallel, and the folder with the input direction of the input waveguide
Angle is acute angle, and the distance between two adjacent described microcavitys are 6 lattice constants, and the output waveguide is arranged in the point
The outer end of microcavity, and the distance between two adjacent described output waveguides are 4 lattice constants, the annular chamber is arranged in institute
It states between a microcavity and the axis, the distance between two described annular chambers are 6 lattice constants.
3. the eight microcavity wavelength division multiplexer of Fourth Ring stated according to claim 2, it is characterised in that: the photonic crystal lattice constant a
=0.56nm, the photonic crystal are the dielectric posts that dielectric constant is 11.56, and the photonic crystal medium column radius is 0.2*a
The cross-sectional shape of the dielectric posts is round, oval, triangle or polygon, and the photon crystal structure background fills material
Material and intracavitary packing material are the air dielectric that dielectric constant is 1, and the annular chamber is hexagonal annular structure.
4. the eight microcavity wavelength division multiplexer of Fourth Ring stated according to claim 2, it is characterised in that: the two-dimentional ruler of the wavelength division multiplexer
Very little is 18 μm of 22 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201821498142.5U CN208621788U (en) | 2018-09-13 | 2018-09-13 | Eight microcavity wavelength division multiplexer of Fourth Ring |
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| CN201821498142.5U CN208621788U (en) | 2018-09-13 | 2018-09-13 | Eight microcavity wavelength division multiplexer of Fourth Ring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112782804A (en) * | 2021-01-13 | 2021-05-11 | 南京邮电大学 | Expandable miniaturized photonic crystal wavelength division multiplexer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112782804A (en) * | 2021-01-13 | 2021-05-11 | 南京邮电大学 | Expandable miniaturized photonic crystal wavelength division multiplexer |
| CN112782804B (en) * | 2021-01-13 | 2023-02-14 | 南京邮电大学 | Expandable miniaturized photonic crystal wavelength division multiplexer |
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Granted publication date: 20190319 Termination date: 20190913 |