CN109814208A - A kind of wavelength-selective switches, Wavelength selecting method and optical cross connection device - Google Patents
A kind of wavelength-selective switches, Wavelength selecting method and optical cross connection device Download PDFInfo
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- CN109814208A CN109814208A CN201910250153.4A CN201910250153A CN109814208A CN 109814208 A CN109814208 A CN 109814208A CN 201910250153 A CN201910250153 A CN 201910250153A CN 109814208 A CN109814208 A CN 109814208A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kind of wavelength-selective switches, Wavelength selecting method and optical cross connection devices.Wavelength-selective switches include input unit, output unit and wavelength separated unit；Input unit includes an input port, for inputting the input light of n preset wavelength；Output unit includes n output port；Wavelength separated unit includes n row on first direction, (n+1) column filter arrays in second direction；1st column optical filter and the angle of second direction are 135 °, and the 1st column the i-th row optical filter reflection wavelength is λiLight, i-th output port be set on the reflected light path of the 1st column the i-th row optical filter；Jth column optical filter and the angle of second direction are 0 °, and it is identical with the 1st to arrange (j-1) row optical filter；Wavelength separated unit further includes and rotary unit, rotary unit are used to that optical filter to be driven to rotate predetermined angle around the optical filter one end；Wavelength-selective switches of the invention have advantage simple for production, insertion loss is low and at low cost.
Description
Technical field
The present embodiments relate to Fibre Optical Communication Technology more particularly to a kind of wavelength-selective switches, Wavelength selecting method and
Optical cross connection device.
Background technique
In Networks of Fiber Communications, optical cross connect (Optical Cross Connect, OXC) is able to achieve will be any defeated
The signal light of inbound port input is exported from specified any output port.Which are mainly applied to backbone network (Backbone
Optical Network), for realizing that it is important that error protection, dynamic light path management and the flexible service configuration of network have
Effect.
On the other hand, it is inserted and is divided using reconfigurable optical in the circuit Metropolitan Area Network (MAN) (Metropolitan Area Network, MAN)
Multiplexer (Reconfigurable Optical Add/Drop Multiplexer, ROADM), it is specific for uploading or downloading
The signal light of wavelength, for realizing that the flexible configuration of Networks of Fiber Communications is of great significance.
And the critical component for constructing OXC and ROADM is exactly wavelength-selective switches (Wavelength Selective
Switch, WSS), basic function is that the signal light of specified wavelength is switched to the port output being arbitrarily designated.It relatively flows at present
The technology of capable production wavelength-selective switches (WSS) has liquid crystal on silicon (Liquid Crystal on Silicon, LCoS) skill
Art, liquid crystal (Liquid Crystal, LC) technology and MEMS (Micro Electro-Mechanical System,
MEMS) micro mirror array technology.It generallys use grating (Grating) in these schemes to be divided, production is complicated, insertion
Larger, higher cost is lost.
Summary of the invention
The embodiment of the present invention provides a kind of wavelength-selective switches, Wavelength selecting method and optical cross connection device, has
Advantage simple for production, insertion loss is low and at low cost.
In a first aspect, the embodiment of the present invention provides a kind of wavelength-selective switches, including input unit, output unit and wave
Long separative unit；
The input unit includes an input port, and the input port is used to input n to the wavelength separated unit
The input light of a preset wavelength propagated along first direction；
The output unit includes n and extends in a second direction, along the output port of first direction arrangement；
The wavelength separated unit includes a filter arrays, and along the first direction, the filter arrays include n row
Optical filter, along the second direction, the filter arrays include (n+1) column optical filter；
The extending direction of 1st column optical filter and the angle of the second direction are 135 °, the reflection of the 1st column the i-th row optical filter
Wavelength is λiInput light, i-th of output port be set on the reflected light path of the 1st column the i-th row optical filter；
The extending direction of jth column optical filter and the angle of the second direction are 0 °, and jth column optical filter and the 1st arrange (j-
1) row optical filter is identical；
The wavelength separated unit further includes and the i-th row jth column optical filter one-to-one rotary unit that the rotation is single
Member is for driving optical filter to rotate predetermined angle around the optical filter one end；
Wherein, first direction is vertical with second direction, and n is integer more than or equal to 2, and 1≤i≤n and i are integer, 2≤
J≤n+1 and j are integer.
Optionally, the input port includes input optical fibre and collimates positioned at the first of the input optical fibre light emission side saturating
Mirror, first collimation lens are used to that the wavelength separated unit will to be coupled into after input light collimation；
The output port includes the second collimation lens and the output optical fibre positioned at the second collimation lens light emission side, institute
The second collimation lens is stated for the output of the wavelength separated unit to be optically coupled into the output optical fibre.
Optionally, the rotary unit includes micro-electromechanical system (MEMS).
Optionally, the MEMS includes controller and rotary shaft；
The rotary shaft is fixedly connected with one end of the optical filter, and the rotating shaft terminal is respectively provided with perpendicular to the rotation
The side arm of shaft, the side arm both ends are provided with the opposite magnet of polar orientation；
The controller is for generating default magnetic field, to drive the optical filter to rotate around the rotary shaft.
Optionally, the predetermined angle keeps postrotational optical filter and the 1st column optical filter parallel or vertical.
Second aspect, the embodiment of the present invention also provide a kind of Wavelength selecting method, suitable for above-mentioned wavelength-selective switches,
Include:
Receive the input light propagated along first direction including n preset wavelength；
The input light is divided into n beam by the 1st column optical filter in wavelength separated unit, wherein the i-th row optical filter reflection wavelength
For λiInput light；
The angle of the 2nd column to (n+1) column optical filter and the 1st column optical filter is adjusted in the wavelength separated unit, so that
Wavelength is λiInput light exported from j-th of output port；
Wherein, first direction is vertical with second direction, and n is integer more than or equal to 2, and 1≤i≤n and i are integer, 2≤
J≤n+1 and j are integer.
Optionally, described to adjust the wave when optical filter is rotated around one end far from the output port as i < j
The 2nd column to (n+1) column optical filter and the angle of the 1st column optical filter includes: in long separative unit
The optical filter for controlling the i-th row (i+1) column is parallel with the optical filter of the 1st column；
The optical filter that control (i+1) arranges (i+1) row to (j-1) row is vertical with the optical filter of the 1st column；
The optical filter for controlling jth row (i+1) column is parallel with the optical filter of the 1st column.
Optionally, described to adjust the wave when optical filter is rotated around one end close to the output port as i < j
The 2nd column to (n+1) column optical filter and the angle of the 1st column optical filter includes: in long separative unit
The optical filter for controlling the i-th row (i+1) column is parallel with the optical filter of the 1st column；
The optical filter for controlling jth row (i+1) column is parallel with the optical filter of the 1st column.
Optionally, work as i > j and adjust the wavelength point when the optical filter is rotated around one end far from the output port
Include: from the 2nd column to (n+1) column optical filter and the angle of the 1st column optical filter in unit
The optical filter for controlling the i-th row (i+1) column is vertical with the optical filter of the 1st column；
The optical filter for controlling jth row (i+1) column is vertical with the optical filter of the 1st column.
Optionally, work as i > j, it is described to adjust the wave when optical filter is rotated around one end close to the output port
The 2nd column to (n+1) column optical filter and the angle of the 1st column optical filter includes: in long separative unit
The optical filter for controlling the i-th row (i+1) column is vertical with the optical filter of the 1st column；
The optical filter that control (i+1) arranges (j+1) row to (i-1) row is parallel with the optical filter of the 1st column；
The optical filter for controlling jth row (i+1) column is vertical with the optical filter of the 1st column.
The third aspect, the embodiment of the present invention also provide a kind of optical cross connection device, including described in two first aspects
The input port of wavelength-selective switches, the input unit of two wavelength-selective switches is connected with each other.
Wavelength-selective switches provided in an embodiment of the present invention, including input unit, output unit and wavelength separated unit；
Input unit includes an input port, and input port is used for wavelength separated unit n preset wavelength of input along first party
To the input light of propagation；Output unit includes n extensions, output port arranged in the first direction in a second direction；Wavelength point
It include a filter arrays from unit, along first direction, filter arrays include n row optical filter, in a second direction, optical filter battle array
Column include (n+1) column optical filter；The extending direction of 1st column optical filter and the angle of second direction are 135 °, the filter of the 1st the i-th row of column
Mating plate reflection wavelength is λiInput light, i-th of output port be set on the reflected light path of the 1st column the i-th row optical filter；Jth
The extending direction of column optical filter and the angle of second direction are 0 °, and it is identical that jth column optical filter with the 1st arranges (j-1) row optical filter；
Wavelength separated unit further includes being used to drive optical filter with the i-th one-to-one rotary unit of row jth column optical filter, rotary unit
Predetermined angle is rotated around the optical filter one end；Wherein, first direction is vertical with second direction, and n is integer more than or equal to 2, and 1
≤ i≤n and i are integer, and 2≤j≤n+1 and j are integer.Being received by input port includes passing along first direction for n wavelength
Input light is divided into n beam by the 1st column optical filter in wavelength separated unit by the input light broadcast, wherein the i-th row optical filter reflects
Wavelength is λiInput light；Pass through the 2nd column in adjusting wavelength separative unit to (n+1) column optical filter and the 1st column optical filter
Angle, the light for controlling each wavelength realizes that optical path switches in wavelength separated unit, so that wavelength is λiInput light from j-th
Output port output, with the low and at low cost advantage of simple for production, insertion loss.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of wavelength-selective switches provided in an embodiment of the present invention；
Fig. 2 is the light path schematic diagram of filter plate 3i when incidence angle is 45 ° in the embodiment of the present invention；
Fig. 3 is a kind of light path schematic diagram of wavelength-selective switches provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another wavelength-selective switches provided in an embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram of micro-electromechanical system (MEMS) provided in an embodiment of the present invention；
Fig. 6 is a kind of schematic top plan view of the rotary shaft in MEMS shown in Fig. 5 of the embodiment of the present invention；
Fig. 7 is a kind of another light path schematic diagram of wavelength-selective switches provided in an embodiment of the present invention；
Fig. 8 is a kind of flow diagram of Wavelength selecting method provided in an embodiment of the present invention；
Fig. 9 is a kind of another light path schematic diagram of wavelength-selective switches provided in an embodiment of the present invention；
Figure 10 is a kind of another light path schematic diagram of wavelength-selective switches provided in an embodiment of the present invention；
Figure 11 is a kind of another light path schematic diagram of wavelength-selective switches provided in an embodiment of the present invention；
Figure 12 is a kind of another light path schematic diagram of wavelength-selective switches provided in an embodiment of the present invention；
Figure 13 is a kind of structural schematic diagram of optical cross connection device provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.It should be noted that the nouns of locality such as "upper", "lower" described in the embodiment of the present invention, "left", "right" are with attached drawing institute
The angle shown should not be construed as the restriction to the embodiment of the present invention come what is be described.Furthermore within a context, it is also necessary to understand
, when mentioning an element and being formed on "above" or "below" another element, another can not only be formed directly into
Perhaps "lower" can also be indirectly formed by intermediary element in another element "upper" or "lower" for element "upper".Term " first ",
" second " etc. is used for description purposes only, and is not offered as any sequence, quantity or importance, and is used only to distinguish different groups
At part.For the ordinary skill in the art, above-mentioned term in the present invention specific can be understood with concrete condition
Meaning.
Fig. 1 show a kind of structural schematic diagram of wavelength-selective switches provided in an embodiment of the present invention.With reference to Fig. 1, this hair
The wavelength-selective switches that bright embodiment provides include input unit 1, output unit 2 and wavelength separated unit 3；Input unit 1
Including an input port, input port be used to input to wavelength separated unit n preset wavelength along first direction y propagation
Input light；Output unit 2 includes the n output ports that x extends, arranges along first direction y in a second direction；Wavelength separated unit
3 include a filter arrays, and along first direction y, filter arrays include n row optical filter, in a second direction x, filter arrays
Including (n+1) column optical filter；The extending direction of 1st column optical filter and the angle of second direction x are 135 °, and the 1st the i-th row of column filters
Piece reflection wavelength is λiInput light, i-th of output port be set on the reflected light path of the 1st column the i-th row optical filter；Jth column
The extending direction of optical filter and the angle of second direction x are 0 °, and it is identical that jth column optical filter with the 1st arranges (j-1) row optical filter；
Wavelength separated unit 3 further includes and the i-th one-to-one rotary unit (not shown in figure 1) of row jth column optical filter, rotary unit
For driving optical filter to rotate predetermined angle around the optical filter one end；Wherein, first direction y is vertical with second direction x, and n is big
In or equal to 2 integer, 1≤i≤n and i are integer, and 2≤j≤n+1 and j are integer.
Illustratively, with reference to Fig. 1, input light be include n preset wavelength (λ1、λ2、……λi、……λn) light, example
Such as multiple wavelength of dense wave division multipurpose (DWDM) system, wavelength separated unit 3 includes a n × (n+1) filtering chip arrays,
Wherein the 1st column optical filter is expressed as 31,32 ... 3i ... 3n,
Fig. 2 show the light path schematic diagram of filter plate 3i when incidence angle is 45 °, and when incidence angle is 45 °, optical filter 3i will
Reflection wavelength is λiLight, make 90 ° of its deviation, transmit the light of other wavelength.Filter chip arrays in the 2nd column optical filter all with filtering
Piece 31 is identical, and the 3rd column optical filter is all identical as filter plate 32, and so on, i.e. (j-1) of the jth column optical filter all with the 1st column
Capable optical filter is identical.Output unit 2 includes n output port 21,22 ... ... 2i ... ... 2n, wherein each output port 2i
On the reflected light path of corresponding filter plate 3i, Fig. 3 show a kind of wavelength-selective switches provided in an embodiment of the present invention
Light path schematic diagram, with reference to Fig. 1, under default situations, output port 2i output wavelength is λiLight；With reference to Fig. 3, the 1st row the 2nd is arranged
It is rotated with the optical filter of the 2nd row the 2nd column, is adjusted to parallel with the 1st column optical filter, then wavelength is λ1Light pass through the 1st row
After the optical filter of 2nd column and the 2nd row the 2nd column successively reflect, from the output of output port 22, i.e. 22 output wavelength of output port at this time
For λ1And λ2Light.It is similar, it, can be by the input light of different wave length from the defeated of any one by adjusting the direction of optical filter
Exit port output, to realize the function of wavelength selection.
The technical solution of the present embodiment receives the input propagated along first direction including n wavelength by input port
Input light is divided into n beam by the 1st column optical filter in wavelength separated unit by light, wherein the i-th row optical filter reflection wavelength is λi's
Input light；By the angle of the 2nd column in adjusting wavelength separative unit to (n+1) column optical filter and the 1st column optical filter, control is each
The light of a wavelength realizes that optical path switches in wavelength separated unit, so that wavelength is λiInput light it is defeated from j-th of output port
Out, the advantage low and at low cost with simple for production, insertion loss.
Based on the above technical solution, Fig. 4 show another wavelength-selective switches provided in an embodiment of the present invention
Structural schematic diagram.With reference to Fig. 4, optionally, input port includes input optical fibre 101 and positioned at 101 light emission side of input optical fibre
First collimation lens 102, the first collimation lens 102 is for being coupled into wavelength separated unit 3 after collimating input light；Output port
Including the second collimation lens 201 and positioned at the output optical fibre 202 of 201 light emission side of the second collimation lens, the second collimation lens 201 is used
In the output of wavelength separated unit is optically coupled into output optical fibre 202.
It is understood that input optical fibre 101 and output optical fibre 202 can be single mode optical fiber, the first collimation lens 102
It can be graded index (GRIN) lens with the second collimation lens 201, it specifically can according to actual needs and processing technology
Selection, the embodiment of the present invention are not construed as limiting this.
Optionally, rotary unit includes micro-electromechanical system (MEMS).Illustratively, Fig. 5 show what present invention implementation provided
A kind of structural schematic diagram of micro-electromechanical system (MEMS).With reference to Fig. 5, optionally, MEMS includes controller 301 and rotary shaft 302；Rotation
Shaft 302 is fixedly connected with one end of optical filter 303, and 302 both ends of rotary shaft are respectively provided with the side arm perpendicular to rotary shaft 302, side
Arm both ends are provided with the opposite magnet of polar orientation；Controller 301 is for generating default magnetic field, to drive optical filter 303 to surround
Rotary shaft rotation.Illustratively, Fig. 6 show a kind of schematic top plan view of the rotary shaft in MEMS shown in Fig. 5, rotary shaft
302 tops are equipped with the side arm 3021 perpendicular to rotary shaft 302, and 3021 both ends of side arm are provided with the opposite magnet of polar orientation
3022。
Optionally, predetermined angle keeps postrotational optical filter and the 1st column optical filter parallel or vertical.
Illustratively, Fig. 7 show a kind of another light path schematic diagram of wavelength-selective switches provided in an embodiment of the present invention,
The a length of λ of Fig. 7 medium wave1Light exported by wavelength separated unit from output port 27, the 1st row the 2nd column and the 7th row the 2nd column in Fig. 7
Optical filter it is parallel with the 1st column, it is to be understood that due to the 2nd column in optical filter cannot through wavelength be λ1Light, therefore
It needs to control the 2nd and arranges the optical filter rotation of the 2nd row to the 6th row to avoid wavelength is blocked as λ1Light, control the 2nd arranges the 2nd in Fig. 7
The optical filter of row to the 6th row is vertical with the 1st column optical filter to avoid blocking.
It is understood that the 2nd optical filter rotation for arranging the 2nd row to the 6th row can also be arranged in embodiment in Fig. 7
Other angles, need to only avoid wavelength is λ1Light.
Fig. 8 is a kind of flow diagram of Wavelength selecting method provided in an embodiment of the present invention, wave provided in this embodiment
Long selection method is suitable for any one wavelength-selective switches provided by the above embodiment, which includes:
Step S10, the input light propagated along first direction including n preset wavelength is received.
Step S20, input light is divided into n beam by the 1st column optical filter in wavelength separated unit, wherein the i-th row optical filter reflects
Wavelength is λiInput light.
Received by input unit includes n preset wavelength (λ1、λ2、……λi、……λn) input light, travel to wave
Long separative unit, the optical filter of the 1st the i-th row of column is reflected into λ respectively in wavelength separated unitiInput light, thus by input light
It is divided into n beam.
Step S30, in adjusting wavelength separative unit the 2nd column to (n+1) column optical filter and the 1st column optical filter angle,
So that wavelength is λiInput light exported from j-th of output port.
Wherein, first direction is vertical with second direction, and n is integer more than or equal to 2, and 1≤i≤n and i are integer, 2≤
J≤n+1 and j are integer.
The technical solution of the present embodiment, first passing through receiving port and receiving includes that propagating along first direction for n wavelength is defeated
Enter light, input light is then divided by n beam by the 1st column optical filter in wavelength separated unit, wherein the i-th row optical filter reflection wavelength
For λiInput light；It arranges by the in adjusting wavelength separative unit the 2nd to the angle of (n+1) column optical filter and the 1st column optical filter,
The light for controlling each wavelength realizes that optical path switches in wavelength separated unit, so that wavelength is λiInput light from j-th export
Port output, with the low and at low cost advantage of simple for production, insertion loss.
On the basis of the above embodiments, optionally, when i < j is adjusted when optical filter is rotated around one end far from output port
The 2nd column to (n+1) column optical filter and the angle of the 1st column optical filter includes: in section wavelength separated unit
The optical filter for controlling the i-th row (i+1) column is parallel with the optical filter of the 1st column；
The optical filter that control (i+1) arranges (i+1) row to (j-1) row is vertical with the optical filter of the 1st column；
The optical filter for controlling jth row (i+1) column is parallel with the optical filter of the 1st column.
Illustratively, Fig. 9 show a kind of another light path schematic diagram of wavelength-selective switches provided in an embodiment of the present invention,
With n=10, i=2, j=7, the rotary shaft of optical filter is located at for optical filter left end, only illustratively shows wavelength in Fig. 9 and is
λ2Light propagation path.The optical filter for controlling the 2nd row the 3rd column parallel with the optical filter that the 1st arranges (such as can rotate clockwise
45°)；It controls the 3rd and arranges that the optical filter of the 3rd row to the 6th row is vertical with the optical filter of the 1st column (such as can be rotated clockwise
135°)；Optical filter and the optical filter of the 1st column for controlling the 7th row the 3rd column are parallel (such as can rotate clockwise 45 °), then wavelength
For λ2Light first pass through the 1st arrange the 2nd row optical filter reflection, to the right transfer 90 °；Then the optical filter by the 2nd row the 3rd column is anti-
It penetrates, downwards 90 ° of turnover, reflects, transfer 90 ° to the right, then from the 7th output port 27 using the optical filter of the 7th row the 3rd column
Output.
It should be noted that restriction sequentially, not may be performed simultaneously, can also successively hold above three spin step
Row, can also execute, it is not limited in the embodiment of the present invention at random.In addition, as j=i+1, due to the i-th row and jth row it
Between blocked without optical filter, therefore without control (i+1) arrange (i+1) row to (j-1) row optical filter with the 1st column filter
The vertical step of mating plate.
Optionally, as i < j, when optical filter is rotated around one end close to output port, the 2nd column in adjusting wavelength separative unit
Include: to (n+1) column optical filter and the angle of the 1st column optical filter
The optical filter for controlling the i-th row (i+1) column is parallel with the optical filter of the 1st column；
The optical filter for controlling jth row (i+1) column is parallel with the optical filter of the 1st column.
Illustratively, Figure 10 show a kind of another optical path signal of wavelength-selective switches provided in an embodiment of the present invention
Figure, with n=10, i=2, j=7, the rotary shaft of optical filter is located at for optical filter right end, and wave is only illustratively shown in Figure 10
A length of λ2Light propagation path.Control the 2nd row the 3rd column optical filter it is parallel with the optical filter that the 1st arranges (such as can be counterclockwise
135 ° of rotation)；Optical filter and the optical filter of the 1st column for controlling the 7th row the 3rd column are parallel (such as can rotate 135 ° counterclockwise),
Then wavelength is λ2Light first pass through the 1st arrange the 2nd row optical filter reflection, to the right transfer 90 °；Then by the filter of the 2nd row the 3rd column
Mating plate reflection, downwards 90 ° of turnover are reflected using the optical filter of the 7th row the 3rd column, are transferred 90 ° to the right, then export from the 7th
Port 27 exports.When it is implemented, restriction sequentially, not may be performed simultaneously, can also successively execute two spin steps, this
Inventive embodiments do not limit this.
Optionally, work as i > j, when optical filter is rotated around one end far from output port, the 2nd column in adjusting wavelength separative unit
Include: to (n+1) column optical filter and the angle of the 1st column optical filter
The optical filter for controlling the i-th row (i+1) column is vertical with the optical filter of the 1st column；
The optical filter for controlling jth row (i+1) column is vertical with the optical filter of the 1st column.
Illustratively, Figure 11 show a kind of another optical path signal of wavelength-selective switches provided in an embodiment of the present invention
Figure, with n=10, i=6, j=2, the rotary shaft of optical filter is located at for optical filter left end, and wave is only illustratively shown in Figure 11
A length of λ6Light propagation path.Control the 6th row the 7th column optical filter it is vertical with the optical filter that the 1st arranges (such as can be clockwise
135 ° of rotation)；Optical filter and the optical filter of the 1st column for controlling the 2nd row the 7th column are vertical (such as can rotate clockwise 135 °),
Then wavelength is λ6Light first pass through the 1st arrange the 6th row optical filter reflection, to the right transfer 90 °；Then by the filter of the 6th row the 7th column
Mating plate reflection, upwards 90 ° of turnover are reflected using the optical filter of the 2nd row the 7th column, are transferred 90 ° to the right, then defeated from second
Exit port 22 exports.When it is implemented, restriction sequentially, not may be performed simultaneously, can also successively execute two spin steps,
It is not limited in the embodiment of the present invention.
Optionally, work as i > j, when optical filter is rotated around one end close to output port, the 2nd column in adjusting wavelength separative unit
Include: to (n+1) column optical filter and the angle of the 1st column optical filter
The optical filter for controlling the i-th row (i+1) column is vertical with the optical filter of the 1st column；
The optical filter that control (i+1) arranges (j+1) row to (i-1) row is parallel with the optical filter of the 1st column；
The optical filter for controlling jth row (i+1) column is vertical with the optical filter of the 1st column.
Illustratively, Figure 12 show a kind of another optical path signal of wavelength-selective switches provided in an embodiment of the present invention
Figure, with n=10, i=6, j=2, the rotary shaft of optical filter is located at for optical filter right end, and wave is only illustratively shown in Figure 12
A length of λ6Light propagation path.Control the 6th row the 7th column optical filter it is vertical with the optical filter that the 1st arranges (such as can be counterclockwise
45 ° of rotation)；It controls the 7th and arranges that the optical filter of the 3rd row to the 5th row is parallel with the optical filter of the 1st column (such as can be rotated counterclockwise
135°)；Optical filter and the optical filter of the 1st column for controlling the 2nd row the 7th column are vertical (such as can rotate 45 ° counterclockwise), then wavelength
For λ6Light first pass through the 1st arrange the 6th row optical filter reflection, to the right transfer 90 °；Then the optical filter by the 6th row the 7th column is anti-
It penetrates, upwards 90 ° of turnover, reflects, transfer 90 ° to the right, then from the 2nd output port 22 using the optical filter of the 2nd row the 7th column
Output.
It should be noted that restriction sequentially, not may be performed simultaneously, can also successively hold above three spin step
Row, can also execute, it is not limited in the embodiment of the present invention at random.In addition, as i=j+1, due to jth row and the i-th row it
Between blocked without optical filter, therefore without control (i+1) arrange (j+1) row to (i-1) row optical filter with the 1st column filter
The parallel step of mating plate.
Figure 13 show a kind of structural schematic diagram of optical cross connection device provided in an embodiment of the present invention.With reference to Figure 13,
Optical cross connection device provided in this embodiment include two any one wavelength-selective switches provided by the above embodiment, two
The input port of the input unit of wavelength-selective switches is connected with each other.The n output port (figure of one of wavelength-selective switches
In 13 by taking n=10 as an example) as the input terminal of optical cross connection device, n output port of another wavelength-selective switches is made
For the output end of optical cross connection device, light path converting is carried out by the wavelength separated unit in the wavelength-selective switches of right side, is made
The port of each output end can export λ1、λ2、……λi、……λnIn any one or more wavelength light.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of wavelength-selective switches, which is characterized in that including input unit, output unit and wavelength separated unit；
The input unit includes an input port, and the input port is used for pre- to wavelength separated unit input n
If the input light of wavelength propagated along first direction；
The output unit includes n and extends in a second direction, along the output port of first direction arrangement；
The wavelength separated unit includes a filter arrays, and along the first direction, the filter arrays include that n row filters
Piece, along the second direction, the filter arrays include (n+1) column optical filter；
The extending direction of 1st column optical filter and the angle of the second direction are 135 °, the 1st column the i-th row optical filter reflection wavelength
For λiInput light, i-th of output port be set on the reflected light path of the 1st column the i-th row optical filter；
The extending direction of jth column optical filter and the angle of the second direction are 0 °, and jth column optical filter and the 1st arrange (j-1) row
Optical filter is identical；
The wavelength separated unit further includes using with the i-th one-to-one rotary unit of row jth column optical filter, the rotary unit
Predetermined angle is rotated around the optical filter one end in drive optical filter；
Wherein, first direction is vertical with second direction, and n is the integer more than or equal to 2, and 1≤i≤n and i are integer, 2≤j≤n
+ 1 and j is integer.
2. wavelength-selective switches according to claim 1, which is characterized in that the input port includes input optical fibre and position
In the first collimation lens of the input optical fibre light emission side, first collimation lens is used to couple after input light collimation
Enter the wavelength separated unit；
The output port includes the second collimation lens and the output optical fibre positioned at the second collimation lens light emission side, and described
Two collimation lenses are used to the output of the wavelength separated unit being optically coupled into the output optical fibre.
3. wavelength-selective switches according to claim 1, which is characterized in that the rotary unit includes MEMS
MEMS；
The MEMS includes controller and rotary shaft；
The rotary shaft is fixedly connected with one end of the optical filter, and the rotating shaft terminal is respectively provided with perpendicular to the rotary shaft
Side arm, the side arm both ends are provided with the opposite magnet of polar orientation；
The controller is for generating default magnetic field, to drive the optical filter to rotate around the rotary shaft.
4. wavelength-selective switches according to claim 1, which is characterized in that the predetermined angle makes postrotational optical filter
It is parallel or vertical with the 1st column optical filter.
5. a kind of Wavelength selecting method, suitable for any wavelength-selective switches of Claims 1 to 4, which is characterized in that packet
It includes:
Receive the input light propagated along first direction including n preset wavelength；
The input light is divided into n beam by the 1st column optical filter in wavelength separated unit, wherein the i-th row optical filter reflection wavelength is λi's
Input light；
The angle for adjusting in the wavelength separated unit the 2nd column to (n+1) column optical filter and the 1st column optical filter, so that wavelength
For λiInput light exported from j-th of output port；
Wherein, first direction is vertical with second direction, and n is the integer more than or equal to 2, and 1≤i≤n and i are integer, 2≤j≤n
+ 1 and j is integer.
6. Wavelength selecting method according to claim 5, which is characterized in that as i < j, the optical filter is around far from described defeated
When one end rotation of exit port, the 2nd column to (n+1) column optical filter and the 1st column is filtered in the adjusting wavelength separated unit
The angle of mating plate includes:
The optical filter for controlling the i-th row (i+1) column is parallel with the optical filter of the 1st column；
The optical filter that control (i+1) arranges (i+1) row to (j-1) row is vertical with the optical filter of the 1st column；
The optical filter for controlling jth row (i+1) column is parallel with the optical filter of the 1st column.
7. Wavelength selecting method according to claim 5, which is characterized in that as i < j, the optical filter is around close to described defeated
When one end rotation of exit port, the 2nd column to (n+1) column optical filter and the 1st column is filtered in the adjusting wavelength separated unit
The angle of mating plate includes:
The optical filter for controlling the i-th row (i+1) column is parallel with the optical filter of the 1st column；
The optical filter for controlling jth row (i+1) column is parallel with the optical filter of the 1st column.
8. Wavelength selecting method according to claim 5, which is characterized in that work as i > j, the optical filter is around far from described defeated
When one end rotation of exit port, the 2nd column are adjusted in the wavelength separated unit to (n+1) column optical filter and the 1st column optical filter
Angle include:
The optical filter for controlling the i-th row (i+1) column is vertical with the optical filter of the 1st column；
The optical filter for controlling jth row (i+1) column is vertical with the optical filter of the 1st column.
9. Wavelength selecting method according to claim 5, which is characterized in that work as i > j, the optical filter is around close to described defeated
When one end rotation of exit port, the 2nd column to (n+1) column optical filter and the 1st column is filtered in the adjusting wavelength separated unit
The angle of mating plate includes:
The optical filter for controlling the i-th row (i+1) column is vertical with the optical filter of the 1st column；
The optical filter that control (i+1) arranges (j+1) row to (i-1) row is parallel with the optical filter of the 1st column；
The optical filter for controlling jth row (i+1) column is vertical with the optical filter of the 1st column.
10. a kind of optical cross connection device, which is characterized in that including two wavelength selections as described in Claims 1 to 4 is any
The input port of switch, the input unit of two wavelength-selective switches is connected with each other.
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| CN109814208B (en) | 2023-07-14 |
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