CN106932862B - Coarse Wave Division Multiplexer based on silicon-based nano beam loop structure - Google Patents
Coarse Wave Division Multiplexer based on silicon-based nano beam loop structure Download PDFInfo
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- CN106932862B CN106932862B CN201710259366.4A CN201710259366A CN106932862B CN 106932862 B CN106932862 B CN 106932862B CN 201710259366 A CN201710259366 A CN 201710259366A CN 106932862 B CN106932862 B CN 106932862B
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- Prior art keywords
- division multiplexer
- nano beam
- wave division
- waveguide
- coarse wave
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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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29331—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by evanescent wave coupling
- G02B6/29335—Evanescent coupling to a resonator cavity, i.e. between a waveguide mode and a resonant mode of the cavity
- G02B6/29338—Loop resonators
-
- 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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29331—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by evanescent wave coupling
- G02B6/29335—Evanescent coupling to a resonator cavity, i.e. between a waveguide mode and a resonant mode of the cavity
- G02B6/29338—Loop resonators
- G02B6/2934—Fibre ring resonators, e.g. fibre coils
-
- 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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
- G02B6/29347—Loop interferometers, e.g. Sagnac, loop mirror
-
- 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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
- G02B6/29358—Multiple beam interferometer external to a light guide, e.g. Fabry-Pérot, etalon, VIPA plate, OTDL plate, continuous interferometer, parallel plate resonator
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Integrated Circuits (AREA)
Abstract
A kind of Coarse Wave Division Multiplexer and its application based on silicon-based nano beam loop structure, it include: nano beam and directional coupler, wherein: nano beam two sides are connected with two waveguides of directional coupler respectively, nano beam is the straight wave guide for being etched with several apertures, which forms a method pool chamber by two reflecting mirrors；Chamber by changing nano beam is grown to change the central wavelength of Coarse Wave Division Multiplexer and free spectral range.The invention avoids bending loss, further reduce device size, realize biggish FSR, therefore be suitable for Coarse Wave Division Multiplexer.
Description
Technical field
It is specifically a kind of to be based on silicon-based nano beam loop structure the present invention relates to a kind of technology of fiber optic communication field
Coarse Wave Division Multiplexer.
Background technique
As the capacity of optical communication system constantly rises, the quantity of optical device is also increasing, and which results in required machines
Room area increases, while the heat of the more voluminous life of device count is also more, needs more cooling systems, to increase entire
The cost of network.In order to reduce device number, device volume, cost is reduced, the optical device of integrated design is needed.Silicon based photon collection
The characteristics of at device due to its CMOS technology compatibility, high integration and low-power consumption, more and more concerns have been obtained in recent years.?
In multiwave optical-fiber network, coarse wavelength division multiplexing (CWDM) device is a kind of critically important passive device, it passes through to very wide wavelength
The signal of different wave length is combined and branch in range, realizes multiwave communication, improves network capacity.Currently on the market
CWDM device is mainly made of discrete component, in order to adapt to the demand of optical device miniaturization, needs to design integrated small-sized of silicon substrate
Change WDM fiber waveguide device.
Summary of the invention
The present invention is larger for prior art size and bending loss is difficult to meet the defects of industry needs, and proposes one kind
Based on the Coarse Wave Division Multiplexer of silicon-based nano beam loop structure, bending loss is avoided, further reduces device size, is realized
Biggish FSR is suitable for coarse wavelength division multiplexing.
The present invention is achieved by the following technical solutions:
The present invention includes: nano beam and directional coupler, in which: nano beam two sides respectively with two waves of directional coupler
Lead connected, nano beam is the straight wave guide for being etched with several apertures, which forms a FP chamber by two reflecting mirrors；It is logical
The long realization of chamber for changing nano beam is crossed to the central wavelength of Coarse Wave Division Multiplexer and the change of FSR.
The directional coupler side is equipped with input port and reflector port, and the other side is equipped with transmission port.
The directional coupler includes two sections of adjacent and parallel waveguides, is coupled by evanscent field and realizes optical power point
Match.
Input port, transmission port and the reflector port uses but is not limited to grating coupler.
By the way that two Coarse Wave Division Multiplexers are respectively embedded in the two-arm of a Mach-Zehnder interferometer, can measure thick
Two outputs of wavelength division multiplexer, the transmission function t of the Coarse Wave Division MultiplexerTWith reflective function tRMeet:
Wherein: t1And k1For directional couple
The transmission coefficient and the coefficient of coup of device, t1 2+k1 2=1, a1It is the transmission rate of waveguide, a1=exp (- α l1-jβl1), α and β are waveguide
Loss factor and propagation constant, the π of β=2 ng/ λ, tFPAnd rFPThe transmission function and reflective function of respectively one nano beam, l1
It is the length of waveguide, ngFor group index, λ is wavelength.
Technical effect
Compared with prior art, the present invention replaces the FP chamber being made of two sagnac loop mirrors with a nano beam, can
To realize the coarse wavelength division multiplexing device of larger FSR and smaller size, and filtering spectrum is approximately rectangular.By the chamber for changing nano beam
The long central wavelength and FSR that can change Coarse Wave Division Multiplexer.
Detailed description of the invention
Fig. 1 is the Coarse Wave Division Multiplexer structure chart based on silicon-based nano beam loop structure；
Fig. 2 is the transmission spectrum and reflectance spectrum of silicon-based nano girder construction；
Fig. 3 is the simulated spectra figure of the Coarse Wave Division Multiplexer based on silicon-based nano beam loop structure；
Fig. 4 is the device junction composition for measuring two output ports of Coarse Wave Division Multiplexer；
In figure: nano beam 1, waveguide 2, directional coupler 3, aperture 4, reflecting mirror 5, input port I, reflector port R, transmission
Port T.
Specific embodiment
As shown in Figure 1, the present embodiment includes: nano beam 1 and directional coupler 3, the both ends of the nano beam pass through wave respectively
It leads 2 to be connected with 3 both ends of directional coupler, 2 length of waveguide of connection is l1, 3 one side ports of directional coupler are equipped with input port I
With reflector port R, another side ports are equipped with transmission port T, and the coefficient of coup of directional coupler 3 is t1.It is received by changing silicon substrate
1 length L of waveguide between rice two reflecting mirrors 5 of beam, thus it is possible to vary Coarse Wave Division Multiplexer central wavelength.
In order to measure two output ports of the Coarse Wave Division Multiplexer, which can be respectively placed in one
The two-arm of Mach-Zehnder interferometer, as shown in Figure 4.
The transmission function t of the Coarse Wave Division MultiplexerTWith reflective function tRAre as follows: Wherein: t1And k1For the transmission coefficient and the coefficient of coup of directional coupler 3, t1 2+k1 2
=1, a1It is the transmission rate of waveguide 2, a1=exp (- α l1-jβl1), the loss factor and propagation constant of α and β for waveguide 2, the π of β=2
ng/ λ, tFPAnd rFPThe transmission function and reflective function of respectively one nano beam 1, l1It is the length of waveguide 2, ngFor group's refraction
Rate, λ are wavelength.
1 parameter of nano beam are as follows: 4 numbers of aperture: between n=4,4 radius of aperture: r=100nm, two holes, 4 center of circle
Distance are as follows: d=300nm, two holes 4 form a reflecting mirrors 5, the distance between two reflecting mirrors 5 are as follows: L=16 μm.The knot
Structure can realize on SOI platform, nano beam waveguide 2 having a size of 700nm × 220nm, remaining waveguide 2 having a size of 450nm ×
220nm.In emulation, the group index of waveguide 2 is 4.35, loss factor 160.The structure chart of the silicon-based nano beam such as Fig. 1 institute
Show.The transmission of silicon-based nano beam and reflectance spectrum are as shown in Figure 2.
Input port, transmission port and the reflector port is made of grating coupler, realizes the coupling with single mode optical fiber
It closes.
The transmission of the Coarse Wave Division Multiplexer and reflectance spectrum are as shown in Figure 3.Its structural parameters is set as: t1=0.924.Freely
Spectral range FSR=23.817nm, 3-dB bandwidth BW=23.454nm, Extinction ratio=20.375dB, Insertion Loss IL=
0.329dB.Its central wavelength and FSR can be changed by L.
Compared with prior art, larger FSR may be implemented due to using silicon-based nano beam loop structure in the present invention
With the coarse wavelength division multiplexing device of smaller size, and filtering spectrum is approximately rectangular.Chamber length by changing nano beam can change thick
The central wavelength and FSR of wavelength division multiplexer.
Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the principle of the invention and objective with difference
Mode carry out local directed complete set to it, protection scope of the present invention is subject to claims and not by above-mentioned specific implementation institute
Limit, each implementation within its scope is by the constraint of the present invention.
Claims (4)
1. a kind of Coarse Wave Division Multiplexer based on silicon-based nano beam loop structure characterized by comprising nano beam and orientation coupling
Clutch, in which: nano beam two sides pass through a waveguide respectively and are connected with two waveguides of directional coupler, and nano beam is one straight
Waveguide, generates several apertures by etching on the straight wave guide, which forms one method by two reflecting mirrors and moor chamber；By changing
Become the chamber length of nano beam to change the central wavelength of Coarse Wave Division Multiplexer and free spectral range；
The transmission function t of the Coarse Wave Division MultiplexerTWith reflective function tRMeet: Wherein: t1And k1For the transmission coefficient and the coefficient of coup of directional coupler, t1 2+k1 2=
1, a1It is the transmission rate of waveguide, a1=exp (- α l1-jβl1), the loss factor and propagation constant of α and β for waveguide, the π of β=2 ng/ λ,
tFPAnd rFPThe transmission function and reflective function of respectively one nano beam, l1It is the length of waveguide, ngFor group index, λ is wave
It is long.
2. Coarse Wave Division Multiplexer according to claim 1, characterized in that the directional coupler side is equipped with input terminal
Mouth and reflector port, the other side are equipped with transmission port.
3. Coarse Wave Division Multiplexer according to claim 1, characterized in that the directional coupler include two sections it is adjacent and
Parallel waveguide is coupled by evanscent field and realizes optical power fluctuation.
4. Coarse Wave Division Multiplexer according to claim 2, characterized in that input port, transmission port and the reflection
Port uses grating coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710259366.4A CN106932862B (en) | 2017-04-20 | 2017-04-20 | Coarse Wave Division Multiplexer based on silicon-based nano beam loop structure |
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| CN201710259366.4A CN106932862B (en) | 2017-04-20 | 2017-04-20 | Coarse Wave Division Multiplexer based on silicon-based nano beam loop structure |
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| CN106932862A CN106932862A (en) | 2017-07-07 |
| CN106932862B true CN106932862B (en) | 2019-05-28 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3032303A1 (en) * | 2014-12-11 | 2016-06-15 | Alcatel Lucent | Optical device with integrated reflector(s) comprising a loop reflector integrating a mach-zehnder interferometer |
| CN105700082A (en) * | 2016-04-11 | 2016-06-22 | 上海交通大学 | Adjustable interleaver based on silicon-substrate Michelson GT interferometer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8379300B2 (en) * | 2008-02-19 | 2013-02-19 | Nec Corporation | Wavelength-variable light source with dual resonator loop circuit |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3032303A1 (en) * | 2014-12-11 | 2016-06-15 | Alcatel Lucent | Optical device with integrated reflector(s) comprising a loop reflector integrating a mach-zehnder interferometer |
| CN105700082A (en) * | 2016-04-11 | 2016-06-22 | 上海交通大学 | Adjustable interleaver based on silicon-substrate Michelson GT interferometer |
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