WO2022062278A1

WO2022062278A1 - Optical signal selection scheduling apparatus and method

Info

Publication number: WO2022062278A1
Application number: PCT/CN2021/070737
Authority: WO
Inventors: 冯勇华
Original assignee: 烽火通信科技股份有限公司
Priority date: 2020-09-25
Filing date: 2021-01-08
Publication date: 2022-03-31
Also published as: CN112099148B; ECSP22079292A; CN112099148A

Abstract

An optical signal selection scheduling apparatus and method, which relate to the technical field of optical communications. The optical signal selection scheduling apparatus comprises N input ports and M output ports, and is formed by means of stacking 2M + 1 layers of planar optical array elements layer by layer. Each layer of planar optical array elements at least has one of the functions of wave splitting, collimation, switching, wave guiding and wave combination; and functional elements of each layer of planar optical array elements are arranged in N + 1 columns, and each column includes K functional elements, which are arranged in a line and do not affect each other. The planar optical array elements have the characteristics of lightness, thinness and planarization. The element size can be greatly decreased, the system complexity can be reduced, the insertion loss and interchannel crosstalk of an optical device can be reduced, and the integration of high-dimensional wavelength selective cross devices can be realized.

Description

A kind of optical signal selection scheduling device and method

technical field

The present invention relates to the technical field of optical communication, in particular to an optical signal selection and scheduling device and method.

Background technique

With the gradual deepening of the informatization revolution, the demand for optical networks for transmission capacity and cross-node scheduling capabilities continues to increase. At the cross-scheduling level, due to the introduction of the OTN time-division multiplexing mechanism, the optical transport network needs to introduce large-capacity electrical cross-connect equipment at the cross-scheduling node to ensure that the service data of OTN time-domain multiplexing at any spatial dimension and wavelength can be realized between the nodes. Non-blocking cross-scheduling. With the rapid growth of the wavelength channel rate, the capacity of the electrical cross-connect equipment is approaching the limit of the bandwidth of the electrical interconnection backplane and the power supply and heat dissipation capacity of the equipment room. At present, the power cross-connection capacity of a single cabinet has reached 64T, and the power consumption is more than 10,000 watts. It can be expanded to more than 128T by clustering. Although OTN is still evolving to meet new network development needs, its defects are becoming increasingly prominent, and technical bottlenecks are difficult to break through. Device power consumption has become an important issue that needs to be considered in network construction and O&M. In addition, the opto-electrical-to-optical conversion required for the electrical crossover also brings additional device costs and signal processing delays.

However, due to the immature optical logic, optical storage and wavelength conversion devices, it is impossible to perform all-optical crossover and scheduling of optical signals in the time and frequency domains. Most of the current commercial all-optical crossover devices are spatial optical line switching. It is an optical switching device with wavelength selection capability. Since most wavelength-selective optical crossover devices based on traditional optical devices change the phase through the accumulation of optical paths, their volume, insertion loss and crosstalk are relatively large, and it is very difficult to integrate large-scale input and output ports.

For example, using currently available commercial WSS (Wavelength Selective Switch) modules to perform all-optical cross-connects has the following difficulties:

(1) Its maximum port dimension is 32 dimensions, which cannot meet the requirements of future network meshing for higher cross-scheduling dimensions;

(2) The insertion loss is as high as 8 ~ 10dB, and additional optical amplifier devices are required for power compensation;

(3) The port isolation is only 20-25dB, and further decreases with the increase of the number of ports;

(4) It is constructed by traditional optical devices, and the module is large in size and poor in integration.

SUMMARY OF THE INVENTION

Aiming at the defects existing in the prior art, the purpose of the present invention is to provide an optical signal selection and scheduling device and method, so as to realize the integration of high-dimensional wavelength selection crossover devices.

In order to achieve the above purpose, the technical scheme adopted by the present invention is: an optical signal selection and scheduling device,

The optical signal selection and scheduling device includes N input ports and M output ports, and is formed by stacking 2M+1 layers of planar optical array elements layer by layer;

Each layer of planar optical array elements has at least one of the functions of demultiplexing, collimating, switching, guiding and combining;

Each layer of planar optical array elements includes (N+1)*K functional elements, all functional elements are arranged in N+1 columns, each column contains K functional elements that are lined up but do not affect each other, K=maximum spectrum range/minimum spectral adjustment interval;

The first N columns of each layer of planar optical array elements are used for processing N input optical signals, and the last column is used for outputting optical signals.

Based on the above technical solutions, the stacking order of the 2M+1-layer planar optical switch array elements of the optical signal selection and scheduling device in the vertical direction is as follows from top to bottom:

The first layer is a planar optical demultiplexing array element;

The 2m layer is a plane optical collimating array element, and m is a positive integer less than or equal to M;

The 2m+1 layer is a planar optical switch array element, and each layer of the planar optical switch array element corresponds to an output port.

On the basis of the above technical solutions, the functional elements include:

The planar optical demultiplexing array element is used to: guide the specific wavelength in the input optical signal to the corresponding waveguide space;

Planar optical collimating array elements are used to: constrain the optical signal propagation path to propagate in the desired direction;

The planar optical switch array element is used for: switching the propagation direction of optical signals.

On the basis of the above technical solution, the planar optical switch array element integrates a wave guide element or a wave combiner element, and the wave guide element is used to guide the optical signal of a specific wavelength to propagate along a specific wave guide space; the wave combiner The element is used to guide optical signals with different wavelength frequencies or/and different guiding spaces to the same guiding space.

On the basis of the above technical solution, when the wavelength starting frequency supported by the optical signal selection and scheduling device is SHz, and the minimum spectrum adjustment interval is ΔHz,

The n-th column of the demultiplexing array element in the planar optical demultiplexing array element is used for: the optical signal with the frequency of S+(k-1)*ΔHz to S+k*ΔHz contained in the optical signal input by the nth input port The components are separated to the position where the demultiplexing array elements of the kth row and the nth column are located, and the optical signal components are vertically introduced to the collimation elements of the kth row and the nth column in the planar optical collimation array element of the next layer; n is a positive integer less than or equal to N, and k is a positive integer less than or equal to K;

The collimation element in the k-th row and n-th column in the planar optical collimation array element is used for: the optical signal input to the n-th input port contains a frequency of S+(k-1)*ΔHz to S+k*ΔHz The optical signal component is collimated so that it is vertically introduced to the switching element of the kth row and the nth column in the next layer of planar optical switch array elements;

The switching element of the kth row and the nth column in the planar optical switch array element is used for: the optical signal input to the nth input port contains an optical signal whose frequency is S+(k-1)*ΔHz to S+k*ΔHz The direction of the component is switched so that it is vertically introduced into the functional element of the kth row and the nth column in the next layer of planar optical array elements, or horizontally propagates along the kth row to the kth row and the N+1 column of the wave combining element ;

The N+1-th column wave combination element in the planar optical switch array element is used to: combine the optical signal components switched by the switch elements in the first N columns of the planar optical array element on this layer and guide them to the corresponding output port .

On the basis of the above technical solution, the switching elements in the kth row and nth column in the optical switch array element are specifically used for: for the included frequency input by the nth input port, the frequency is S+(k-1)*ΔHz to S+ When the output port of the optical signal of k*ΔHz is inconsistent with the output port corresponding to the current layer, the direction of the optical signal component is switched so that it is vertically introduced into the kth row and nth column of the planar optical collimation array element in the next layer. On the collimating element of , when its output port is consistent with the output port corresponding to this layer, switch the direction of the optical signal component, so that it propagates horizontally along the kth row to the kth row and the N+1 column of the combined wave element.

On the basis of the above technical solution, at any time, there is only one switch element in the kth row of the planar optical switch array element at most, so that the optical signal component whose frequency is from S+(k-1)*ΔHz to S+k*ΔHz is along the th The k-row horizontally propagates to the guided wave space of the k-th row and the N+1-th column.

On the basis of the above technical solutions, the functional elements of the same number of rows and the same number of columns in the planar optical array elements of each layer are vertically aligned from top to bottom.

The present invention also provides an optical signal selection and scheduling method using the optical signal selection and scheduling device, comprising the following steps;

Acquire the wavelength starting frequency SHz and the minimum spectrum adjustment interval ΔHz supported by the optical signal selection and scheduling device; acquire the frequency included in the input optical signal, the input port n and the corresponding output port m;

Separate the optical signal components with frequencies from S+(k-1)*ΔHz to S+k*ΔHz contained in the optical signal input from the nth input port to the position where the waveguide element of the kth row and the nth column is located, and The optical signal component is vertically introduced into the collimation element of the kth row and the nth column in the planar optical collimation array element of the next layer; n is a positive integer less than or equal to N, and k is a positive integer less than or equal to K;

The collimation element in the k-th row and n-th column in the planar optical collimation array element collimates the optical signal components whose frequencies are from S+(k-1)*ΔHz to S+k*ΔHz contained in the n-th input optical signal processing, so that it is vertically introduced into the switching element of the kth row and the nth column in the next layer of planar optical switch array elements;

The frequency included in the optical signal input to the nth input port by the switch element of the kth row and the nth column in the planar optical switch array element smaller than the 2m+1th layer is S+(k-1)*ΔHz to S+k* The direction of the optical signal component of ΔHz is switched so that it is vertically introduced into the collimation element of the kth row and the nth column in the next layer of planar optical collimation array elements;

The frequency included in the optical signal input to the nth input port by the switch element of the kth row and the nth column in the planar optical switch array element of the 2m+1th layer is S+(k-1)*ΔHz to S+k*ΔHz The direction of the optical signal component is switched so that it propagates horizontally along the kth row to the multiplexing element of the kth row and the N+1th column;

The N+1-th column of wave multiplexing elements in the planar optical switch array element multiplexes the optical signal components switched by the switching elements in the first N columns of the planar optical array element of the layer and guides them to the corresponding output ports.

On the basis of the above technical solution, at any time, at most one switch element in the kth row of the planar optical switch array element selects the propagation path, so that the optical signal whose frequency is S+(k-1)*ΔHz to S+k*ΔHz The component propagates horizontally along the kth row to the guided wave space of the kth row and the N+1th column.

Compared with the prior art, the advantages of the present invention are:

The optical signal selection and scheduling device of the present invention supports N input ports and M output ports, and is composed of 2M+1 layers of planar optical array elements stacked layer by layer; One of the functions of guided wave and wave combination; the functional elements of each layer of planar optical array elements are arranged in N+1 columns, and each column contains K functional elements that are lined up in line but do not affect each other. The optical signal selection and scheduling device of the present invention adopts a plane optical array element, and the plane optical array element has the characteristics of lightness, thinness and planarization, which can greatly reduce the size of the element, reduce the complexity of the system, reduce the insertion loss of optical devices and the crosstalk between channels, and realize high dimension. Integration of wavelength selective crossover devices.

The optical signal selection and scheduling method of the present invention adopts the above-mentioned planar optical array elements to form an optical signal selection and scheduling device for optical signal selection and scheduling, which greatly reduces the scheduling complexity, and can effectively reduce the insertion loss of optical devices and inter-channel crosstalk.

Description of drawings

1 is a schematic diagram of a one-layer planar optical array element according to an embodiment of the present invention;

2 is a schematic diagram of a planar optical demultiplexing array element according to an embodiment of the present invention;

3 is a schematic diagram of a planar optical collimating array element according to an embodiment of the present invention;

4 is a schematic diagram of a planar optical switch array element according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a stacked structure of planar optical array elements of an optical signal selection and scheduling apparatus according to an embodiment of the present invention.

detailed description

The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

An embodiment of the present invention provides an optical signal selection and scheduling device. The optical signal selection and scheduling device includes N input ports and M output ports, and is composed of 2M+1 layers of planar optical array elements stacked layer by layer; N and M are both positive Integer.

The optical signal selection and scheduling device of the embodiment of the present invention adopts a plane optical array element, and the plane optical array element has the characteristics of lightness, thinness and planarization, which can greatly reduce the size of the element, reduce the complexity of the system, reduce the insertion loss of the optical device and the crosstalk between the channels, and realize the Integration of high-dimensional wavelength-selective crossover devices.

Specifically, for an optical signal selection and scheduling device that supports N input ports and M output ports, the wavelength starting frequency is SHz, the minimum spectrum adjustment interval is ΔHz, and the maximum spectrum range is K*ΔHz, each layer The planar optical array element is composed of at least (N+1)*K functional elements arranged according to the following rules: each layer of planar optical array elements is divided into K rows and N+1 columns; a certain interval is maintained between adjacent columns to avoid To generate interference, the first N columns are used for the processing of N input optical signals, and the last column is used for the output of optical signals; each column contains K functional elements that are lined up in a row and are closely connected but do not affect each other.

In the optical signal selection and scheduling device constituting the above M output ports, the stacking sequence of the planar optical switch array elements in the vertical direction is as follows from top to bottom:

①The first layer is a planar optical demultiplexing array element;

②The second m (m=1, 2, 3...M) layer is a plane optical collimating array element;

③ The 2m+1 (m=1, 2, 3...M) layer is a planar optical switch array element, and each layer of the planar optical switch array element corresponds to one output port.

The functional element refers to a planar optical element having at least one of the above-mentioned functions of demultiplexing, collimating, switching, guiding and combining. Among them, demultiplexing refers to guiding a specific wavelength in the input optical signal to the corresponding guided wave space; collimation refers to constraining the optical signal propagation path to make it propagate in the desired direction; switching refers to the realization of the optical signal propagation direction Fast switching guided wave device; guided wave refers to guiding optical signals of a specific wavelength to propagate along a specific guided wave space; multiplexing refers to guiding optical signals with different wavelength frequencies or (and) guided wave spaces to the same guided wave space.

Specifically, a waveguide element or a multiplexing element is integrated in the planar optical switch array element. The waveguide elements are arranged between the switching functional elements in the same row, and between the switching functional elements in the Nth column of the row and the N+1 th column multiplexing elements, and are used to guide the optical signal of a specific wavelength along a specific waveguide space spread.

The multiplexing elements are arranged in the N+1th column of each row, and are used for guiding optical signals with different wavelengths and frequencies or/and different guiding spaces to the same guiding space.

The optical signal selection and scheduling device of the present invention can greatly reduce the size of components, reduce the complexity of the system, reduce the insertion loss of optical devices and crosstalk between channels, and realize the integration of high-dimensional wavelength selection cross-connection devices.

Specifically, the embodiments of the present invention provide functional elements included in an optical signal selection and scheduling apparatus for:

①The nth (n=1,2,3...N) column of the planar optical demultiplexing array element is used to realize the demultiplexing of the nth input optical signal, and the frequency contained in the nth input optical signal is S+(k -1) The optical signal components from *ΔHz to S+k*ΔHz are separated to the position of the kth row and nth column of the demultiplexing array element, so that it can be vertically introduced into the kth (k =1,2,3...K) on the nth (n=1,2,3...N) column functional element;

② The kth (k=1, 2, 3...K) row and nth (n=1, 2, 3...N) column collimation elements in the planar optical collimation array element are used to realize the nth input light The signal contains the collimation of the optical signal component whose frequency is S+(k-1)*ΔHz to S+k*ΔHz, so that it can be vertically introduced into the kth (k=1,2 ,3...K) on the nth (n=1,2,3...N) column functional element;

③ The kth (k=1, 2, 3...K) row and nth (n=1, 2, 3...N) column switch elements in the planar optical switch array element are used to realize the nth input optical signal The included optical signal component propagation path switching with frequencies from S+(k-1)*ΔHz to S+k*ΔHz, one of the following two propagation paths can be selected by controlling the switching element:

(A) When the output port corresponding to the input optical signal is m, in the switch array element before reaching the 2m+1th layer, the kth (k=1,2 ,3...K) on the nth (n=1,2,3...N) column functional element;

(B) Among the switch array elements reaching the 2m+1th layer, the waveguide elements between the switch array elements along the kth row, and between the switch array elements in the Nth column and the multiplexing elements in the N+1th column The guided wave element between them propagates horizontally to the guided wave space of the kth row and the N+1th column;

At any time, at most one switching element in the kth (k=1, 2, 3...K) row of the planar optical switch array element selects the propagation path (B).

(4) The N+1th column in the planar optical switch array element is a multiplexing element, which is used to combine the optical signal components switched by the switching elements corresponding to the first N columns in the planar optical array element of this layer and guide them to the corresponding optical signal components. output port.

The planar optical array element shown in Figure 1 is composed of functional element arrays of K rows and N+1 columns, where λ1, λ2, λ3...λK are the row numbers of the functional array, and I1, I2, I3...IN are the functions The column label of the first N columns of the array, and O is the column label of the N+1th column of the function array. A certain interval is maintained between any two adjacent columns to avoid interference. The functional elements in the planar optical array are numbered according to their row and column positions, and the kth (k=1, 2, 3...K) row and nth (n=1, 2, 3...N) column functional elements are numbered Fkn (k=1, 2, 3...K, n=1, 2, 3...N), the functional element label of the N+1th column and the k (k=1, 2, 3...K) row is Ok (n=1, 2, 3...N). The functional elements labeled Fkn (k=1,2,3...K,n=1,2,3...N) mainly realize the functions of demultiplexing, collimation and switching, and the functional elements are labeled Ok(k=1,2, 3… The functional components of K) are multiplexing components, which mainly realize the multiplexing function.

The planar optical demultiplexing array element shown in Figure 2 is composed of functional element arrays with K rows and N+1 columns, where λ1, λ2, λ3...λK are the row labels of the demultiplexing array elements, I1, I2, I3... ...IN is the column label of the first N columns of the demultiplexing array element, and O is the column label of the N+1th column of the functional array. A certain interval is maintained between any two adjacent columns to avoid interference.

The functional elements in the planar optical array are numbered according to their row and column positions, and the kth (k=1, 2, 3...K) row and nth (n=1, 2, 3...N) column demultiplexing array The element numbers are Dkn (k=1,2,3...K,n=1,2,3...N). The function element of the N+1th column and the kth row (k=1, 2, 3...K) is vacant.

The demultiplexing array element labeled Dkn (k=1,2,3...K,n=1,2,3...N) sets the frequency contained in the nth input optical signal as S+(k-1)* The optical signal components from ΔHz to S+k*ΔHz are separated to the position where the demultiplexing array elements of the kth row and the nth column are located, and propagate downward vertically.

The planar optical collimation array element shown in Figure 3 is composed of functional element arrays of K rows and N+1 columns, wherein λ1, λ2, λ3...λK is the row label of the collimating array element, and O is the Nth functional array +1 for the column number of the column. A certain interval is maintained between any two adjacent columns to avoid interference.

The functional elements in the planar optical array are numbered according to their row and column positions, and the kth (k=1, 2, 3...K) row and nth (n=1, 2, 3...N) column demultiplexing array The element numbers are Ckn (k=1,2,3...K,n=1,2,3...N). The function element of the N+1th column and the kth row (k=1, 2, 3...K) is vacant.

The collimating array elements labeled Ckn (k=1,2,3...K,n=1,2,3...N) can input the frequency from top to bottom as S+(k-1)*ΔHz to The collimation of the optical signal component of S+k*ΔHz, so that it can be vertically introduced into the kth (k=1, 2, 3...K) row of the nth (n=1, 2) in the next layer of planar optical array elements ,3...N) on the functional elements of the column.

The planar optical switch array element shown in Fig. 4 is composed of a functional element array of K rows and N+1 columns, wherein λ1, λ2, λ3...λK are the row numbers of the switch array elements. A certain interval is maintained between any two adjacent columns to avoid interference.

The functional elements in the planar optical array are numbered according to their row and column positions, and the kth (k=1, 2, 3...K) row and nth (n=1, 2, 3...N) column switch array elements The labels are Skn (k=1,2,3...K,n=1,2,3...N). The functional elements of the N+1th column and the kth row (k=1, 2, 3...K) are labeled as multiplexing elements Ok (k=1, 2, 3...K).

The frequency of the switching element pair labeled Skn (k=1,2,3...K,n=1,2,3...N) from top to bottom is S+(k-1)*ΔHz to S+k *The optical signal component propagation path of ΔHz is switched, and one of the following two propagation paths can be selected by controlling the switching element:

(A) vertical introduction to the kth (k=1, 2, 3...K) row and nth (n=1, 2, 3...N) column functional elements in the next layer of planar optical array elements;

(B) Propagating horizontally along the waveguide elements between the switch array elements in the kth row and the waveguide elements between the switch array elements in the Nth column and the multiplexing element in the N+1th column to the Nth row in the kth row +1 column of guided wave space;

The multiplexing element labeled Ok(k=1,2,3...K) switches the rows corresponding to the first N columns in the kth (k=1,2,3...K) row of the planar optical switch array element on this layer. The optical signal components switched by the element are combined and guided to the output port.

As shown in Figure 5, the optical signal selection and scheduling device supporting N input ports and M output ports is composed of 2M+1 layers of planar optical array elements with functions of demultiplexing, collimating, switching, guiding and combining waves. .

The plane optical array elements of each layer are numbered L_1, L_2, L_3,... =1,2,3...N) The functional elements in the column numbered Fkn (k=k=1,2,3...K,n=1,2,3...N) are vertically aligned from top to bottom.

Figure 5 labels the functional elements on the row section of the planar optical array element of each layer: Dn (n=1, 2, 3...N) is the n-th column of demultiplexing array elements on the planar optical demultiplexing array element; Cn (n =1,2,3...N) is the nth column of collimation array elements on the planar optical collimation array element; Sn(n=1,2,3...N) is the nth column switch on the planar optical switch array element Array element; O_m (m=1, 2, 3...M) is the N+1th column of wave multiplexing element on the L_2m+1 (m=1,2,3...M) layer planar optical switch array element.

The above-mentioned optical signal selection and scheduling device with N inputs and M outputs is constructed, and the stacking order of the planar optical switch array elements in the vertical direction from top to bottom is: Layer L_1 is a planar optical demultiplexing array element; L_2m(m=1 ,2,3...M) layers are planar optical collimating array elements; L_2m+1 (m=1,2,3...M) layers are planar optical switching array elements.

It supports N input ports, M output ports, the wavelength starting frequency is SHz, the minimum spectrum adjustment interval is ΔHz, and the maximum spectrum range is K*ΔHz. The optical signal selection scheduling device, the operation process is as follows:

①The nth (n=1, 2, 3...N) input optical signal passes through the demultiplexing array element in the planar optical demultiplexing array element of the L_1 layer, and the frequency contained is S+(k-1)*ΔHz to The optical signal component of S+k*ΔHz (k=1, 2, 3...K) is separated to the k-th row and n-th column of the demultiplexing array element Dkn, and the optical signal component is vertically introduced into the L_2 layer plane optical collimation On the collimation element Ckn of the k-th row and the n-th column in the array element;

②The frequency of the n-th input optical signal separated by the collimation element Ckn of the k-th row and the n-th column in the L_2-layer planar optical collimation array element to the L_1-layer demultiplexing array element is S+(k-1)*ΔHz to S+ The optical signal component of k*ΔHz is collimated so that it can be vertically introduced into the switching element of the kth row and the nth column in the next layer of planar optical array elements;

③Through the control of the switching elements of the kth row and the nth column in the L_3 layer planar optical switch array element, one of the following two propagation paths can be selected:

The first type: vertically into the collimation element Ckn of the kth row and the nth column in the L_4 plane optical collimation array element;

The second type: horizontally propagate along the waveguide element in the kth row of the L_3 planar optical switch array element to the waveguide space in the kth row and the N+1th column;

For example, if the output port m=1, that is, the output port corresponding to the optical signal component whose frequency is from S+(k-1)*ΔHz to S+k*ΔHz contained in the nth input optical signal is O_1, then control the L_3 layer plane The switching element in the kth row and nth column of the optical switch array element makes the optical signal component propagate horizontally along the kth row of the L_3 planar optical switch array element to the kth row and the N+1th column of the wave combining element. The guided wave space where Ok is located;

④If the output port m=y, that is, the output port corresponding to the optical signal component whose frequency is from S+(k-1)*ΔHz to S+k*ΔHz contained in the nth input optical signal is O_y(y=2,3… ...M), make the optical signal components vertically pass through the functional elements Ckn of the kth row and the nth column in the L_4, L_5, ... Under the control of the switching element in the k-th row and n-th column of the array element, the wave-guiding element in the k-th row of the L_2y+1 plane optical switch array element horizontally propagates to the position of the k-th row and the N+1-th column of the wave combining element Ok. guided wave space.

The embodiment of the present invention also provides an optical signal selection scheduling method using the optical signal selection scheduling device, which includes the following steps;

The N+1-th column of wave multiplexing elements in the planar optical switch array element multiplexes the optical signal components switched by the switch elements in the first N columns of the planar optical array element of the layer and guides them to the corresponding output ports.

The optical signal selection and scheduling method according to the embodiment of the present invention adopts the above-mentioned planar optical array elements to form an optical signal selection and scheduling device for optical signal selection and scheduling, which greatly reduces the scheduling complexity, and can effectively reduce the insertion loss of optical devices and inter-channel crosstalk.

As a preferred embodiment, at any time, at most one switch element in the kth row of the planar optical switch array element selects the propagation path, so that the optical signal component whose frequency is S+(k-1)*ΔHz to S+k*ΔHz is along the It propagates horizontally along the kth row to the guided wave space of the kth row and the N+1th column.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

An optical signal selection and scheduling device, characterized in that;

The optical signal selection and scheduling device includes N input ports and M output ports, and is formed by stacking 2M+1 layers of planar optical array elements layer by layer;

Each layer of planar optical array elements has at least one of the functions of demultiplexing, collimating, switching, guiding and combining;

Each layer of planar optical array elements includes (N+1)*K functional elements, all functional elements are arranged in N+1 columns, each column contains K functional elements that are lined up but do not affect each other, K=maximum spectrum range/minimum spectral adjustment interval;

The first N columns of each layer of planar optical array elements are used for processing N input optical signals, and the last column is used for outputting optical signals.
The device according to claim 1, wherein the stacking sequence of the 2M+1-layer planar optical switch array elements of the optical signal selection and scheduling device in the vertical direction is as follows from top to bottom:

The first layer is a planar optical demultiplexing array element;

The 2mth layer is a plane optical collimating array element, and m is a positive integer less than or equal to M;

The 2m+1 layer is a planar optical switch array element, and each layer of the planar optical switch array element corresponds to an output port.
The apparatus of claim 2, wherein the functional element comprises:

The planar optical demultiplexing array element is used to: guide the specific wavelength in the input optical signal to the corresponding waveguide space;

Planar optical collimating array elements are used to: constrain the optical signal propagation path to propagate in the desired direction;

The planar optical switch array element is used for: switching the propagation direction of optical signals.
The device according to claim 3, wherein the planar optical switch array element is integrated with a waveguide element or a multiplexer element, and the waveguide element is used to guide the optical signal of a specific wavelength to propagate along a specific waveguide space ; The multiplexing element is used for guiding optical signals with different wavelengths and frequencies or/and different guiding spaces to the same guiding space.
The apparatus of claim 4, wherein:

When the wavelength starting frequency supported by the optical signal selection and scheduling device is SHz, and the minimum spectrum adjustment interval is ΔHz,

The n-th column of the demultiplexing array element in the planar optical demultiplexing array element is used for: the optical signal with the frequency of S+(k-1)*ΔHz to S+k*ΔHz contained in the optical signal input by the nth input port The components are separated to the position where the demultiplexing array elements of the kth row and the nth column are located, and the optical signal components are vertically introduced to the collimation elements of the kth row and the nth column in the planar optical collimation array element of the next layer; n is a positive integer less than or equal to N, and k is a positive integer less than or equal to K;

The collimation element in the k-th row and n-th column in the planar optical collimation array element is used for: the optical signal input to the n-th input port contains a frequency of S+(k-1)*ΔHz to S+k*ΔHz The optical signal component is collimated so that it is vertically introduced to the switching element of the kth row and the nth column in the next layer of planar optical switch array elements;

The switching element in the kth row and nth column in the planar optical switch array element is used for: the optical signal input to the nth input port contains an optical signal whose frequency is S+(k-1)*ΔHz to S+k*ΔHz The direction of the component is switched so that it is vertically introduced into the functional element of the kth row and the nth column in the next layer of planar optical array elements, or horizontally propagates along the kth row to the kth row and the N+1 column of the wave combining element ;

The N+1-th column of wave multiplexing elements in the planar optical switch array element is used to combine the optical signal components switched by the switching elements in the first N columns of the planar optical array element on this layer and guide them to the corresponding output ports .
The device of claim 5, wherein:

The switching element in the kth row and nth column in the optical switch array element is specifically used for: for the optical signal input by the nth input port and containing the frequency of S+(k-1)*ΔHz to S+k*ΔHz, its When the output port is inconsistent with the output port corresponding to this layer, the direction of the optical signal component is switched so that it is vertically introduced into the collimation element of the kth row and the nth column in the plane optical collimation array element of the next layer; its output When the port is the same as the output port corresponding to the layer, the direction of the optical signal component is switched so that it propagates horizontally along the kth row to the wave combining element in the kth row and the N+1th column.
The device according to claim 5, characterized in that, at any time, there is at most one switch element in the kth row of the planar optical switch array element to make the light of frequency S+(k-1)*ΔHz to S+k*ΔHz The signal component propagates horizontally along the kth row to the guided wave space of the kth row and the N+1th column.
6. The device of claim 5, wherein the functional elements in the same row and the same column in the planar optical array elements of each layer are vertically aligned from top to bottom.
An optical signal selection and scheduling method using the optical signal selection and scheduling device according to claim 4, characterized in that it comprises the following steps;

Acquire the wavelength starting frequency SHz and the minimum spectrum adjustment interval ΔHz supported by the optical signal selection and scheduling device; acquire the frequency included in the input optical signal, the input port n and the corresponding output port m;

Separate the optical signal components with frequencies from S+(k-1)*ΔHz to S+k*ΔHz contained in the optical signal input from the nth input port to the position where the waveguide element in the kth row and the nth column is located, and The optical signal component is vertically introduced into the collimation element of the kth row and the nth column in the planar optical collimation array element of the next layer; n is a positive integer less than or equal to N, and k is a positive integer less than or equal to K;

The collimation element in the k-th row and n-th column in the planar optical collimation array element collimates the optical signal components whose frequencies are from S+(k-1)*ΔHz to S+k*ΔHz contained in the n-th input optical signal processing, so that it is vertically introduced into the switching element of the kth row and the nth column in the next layer of planar optical switch array elements;

The frequency included in the optical signal input to the nth input port by the switch element of the kth row and the nth column in the planar optical switch array element smaller than the 2m+1th layer is S+(k-1)*ΔHz to S+k* The direction of the ΔHz optical signal component is switched so that it is vertically introduced into the collimation element of the kth row and the nth column in the next layer of planar optical collimation array elements;

The frequency included in the optical signal input to the nth input port by the switch element of the kth row and the nth column in the planar optical switch array element of the 2m+1th layer is S+(k-1)*ΔHz to S+k*ΔHz The direction of the optical signal component is switched so that it propagates horizontally along the kth row to the multiplexing element of the kth row and the N+1th column;

The N+1-th column of wave multiplexing elements in the planar optical switch array element multiplexes the optical signal components switched by the switch elements in the first N columns of the planar optical array element of the layer and guides them to the corresponding output ports.
The method according to claim 8, wherein, at any time, at most one switch element in the kth row of the planar optical switch array element selects the propagation path, so that the frequency is S+(k-1)*ΔHz to S+k *The optical signal component of ΔHz propagates horizontally along the kth row to the kth row and the N+1th column of the guided wave space.