CN108599859B - A kind of EOPCB and multicasting method based on totally interconnected optical-fiber network - Google Patents

Abstract

The invention discloses an EOPCB based on a fully interconnected optical network and a multicast method. The EOPB includes: a data chip, a VCSEL/PIN light emitting/receiving array, an MT coupling interface, a phase calculation holographic grating, an optical switch, and a parallel optical fiber Arrays, parallel optical waveguide arrays; rearrange the electrical signals of each data chip at the input end; VCSEL/PIN light emitting/receiving arrays are used for sending and receiving parallel optical signals; phase calculation holographic gratings are used as optical beam splitters, through parallel The parallel optical signals of the optical waveguide array are input to the phase calculation holographic grating and then duplicated simultaneously; the optical switch is used to select and output optical signals for exchange, and the output optical signals are recombined according to the requirements of optical interconnection and exchange. The invention can realize unicast and multicast between chips, and the entire optical path structure is simple, and only a single-chip phase calculation holographic grating is needed to realize simultaneous multi-channel beam splitting and multi-casting functions for all multi-node parallel optical signals, eliminating the need for inter-optical channels. Crosstalk, strong anti-interference ability, flexible and scalable.

Description

An EOPCB and Multicast Method Based on Fully Interconnected Optical Network

technical field

The invention belongs to the fields of information optoelectronics, optical communication, and computer interconnection network, and more specifically relates to an EOPCB and a multicast method based on a fully interconnected optical network.

Background technique

With the rapid development of information technology such as computer and communication technology, various high-performance computers and ultra-high switching systems have proposed high-density, high-bandwidth and low-loss communication between internal elements or other external systems. requirements. Due to the defects of limited bandwidth, clock skew, severe crosstalk, and high energy consumption, the traditional copper wire-based electrical interconnection has been unable to meet the continuously increasing demand for chip interconnection bandwidth and interconnection density. Optical interconnection makes full use of the advantages of "light" and uses light waves as information carriers to realize information exchange between computing units. It has the advantages of extremely high space-time bandwidth product, high density, strong anti-interference ability, low delay and low energy consumption. .

In recent years, the optical interconnection technology between chips on the printed circuit board (PCB) has developed rapidly. Use optical waveguides instead of copper wires to make electro-optical printed circuit boards (EOPCB, Electro-optical printed circuit board). Most current EOPCB-based optical interconnection solutions directly replace chips with optical receivers (VCSEL/PIN), and replace copper wires with optical waveguides. The topological structure of the chip network usually adopts bus, ring, star, MESH and other structures. The EOPCB of the above network structure either does not have the multicast function, or uses multiple optical beam splitters to realize the splitting of each optical signal. beam function, many optoelectronic devices are used, and the structure is complex.

Contents of the invention

Aiming at the defects of the prior art, the purpose of the present invention is to solve the technical problem of the complex structure of the EOPCB with the multicast function in the prior art.

In order to achieve the above object, on the one hand, the present invention provides an EOPCB based on a fully interconnected optical network, and the EOPCB includes: N data chips, n 1×N VCSEL light emitting array devices, MT coupling interface, one 1×N phase calculation holographic grating, n×N N×1 optical switches, N 1×n PIN optical receiving array devices, parallel optical fiber array, parallel optical waveguide array;

The data chip is used to send and receive electrical signals, and the electrical signals sent by the i-th data chip are I _i1 , I _i2 ,...,I _in , i=1,2,...,N; The electrical signals of the data chip are rearranged into n groups of electrical signals, and the jth group of electrical signals is I _1j , I _2j ,...,I _Nj , j=1,2,...,n;

The VCSEL light-emitting array device and the PIN light-receiving array device are multiple parallel light-emitting and receiving array devices, and the VCSEL light-emitting array device is used to realize electrical/optical conversion of rearranged electrical signals, so The PIN optical receiving array device is used to realize the optical/electrical conversion of the recombined optical signal;

The MT coupling interface is located between the VCSEL light-emitting array device and the phase calculation holographic grating, between the phase calculation holographic grating and the optical switch, and is used to realize optical communication between the optical fiber array and the optical waveguide array. coupling;

The phase calculation holographic grating is used as an optical beam splitter, and the parallel optical signals passed through the parallel optical waveguide array are input to the phase calculation holographic grating and then copied into N copies at the same time;

Each optical switch is used to select one channel of optical signal output, and the output optical signals are recombined according to the requirements of optical interconnection and switching.

Optionally, the optical waveguide array is a polymer optical waveguide array.

On the other hand, the present invention provides a kind of multicasting method of EOPB, comprises the following steps: S1. the electric signal after the rearrangement respectively drives one in the VCSEL light-emitting array device, constitutes parallel optical signal through electric/optical conversion; S2. After the optical signal is coupled through the optical fiber array and the optical waveguide array, it is input to the phase calculation holographic grating, and after the phase calculation holographic grating is split, it is copied into N parallel optical signals; S3. The copied optical signal passes through the parallel optical waveguide After coupling, they are respectively input into optical switches. According to the requirements of optical interconnection and exchange, each optical switch selects one optical signal output, and the output optical signals are recombined; S4. The recombined optical signals are respectively input to PIN In the light-receiving array device, parallel electrical signals are formed through optical/electrical conversion; S5. The converted electrical signals are amplified and input in parallel to respective target data chips.

Generally speaking, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:

1. The present invention proposes a specific structure of the EOPCB of a fully interconnected optical network. The entire optical path structure is simple, and the number of chip nodes and the number of parallel channels of each node can be set according to the requirements of speed and bandwidth, which is flexible and scalable. Scalability, the EOPCB of this structure can realize unicast and multicast between chips.

2. The present invention avoids the crosstalk caused by the cross wiring of the optical fiber array and the optical waveguide array on the EOPBB by rearranging the electrical signals of each data chip at the input end.

3. The present invention avoids the crossover loss caused by the crossover optical waveguide through the parallelization of the optical waveguide signal channels of each node.

4. The present invention can realize simultaneous multi-channel beam splitting and multi-broadcasting functions for all multi-node parallel optical signals through a single-chip phase calculation holographic grating, eliminating crosstalk between optical channels.

Description of drawings

FIG. 1 is a schematic diagram of an EOPCB topology based on a fully interconnected optical network provided by the present invention.

FIG. 2 is a schematic structural diagram of an EOPCB board based on a fully interconnected optical network provided by an embodiment of the present invention.

FIG. 3 is a schematic diagram of an EOPCB topology structure based on a fully interconnected optical network according to an embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

FIG. 1 is a schematic diagram of an EOPCB topology based on a fully interconnected optical network provided by the present invention. As shown in Figure 1, an EOPCB based on a fully interconnected optical network, the EOPCB includes: N data chips, n 1×N VCSEL light emission array devices, MT coupling interface, and 1 1×N phase computing hologram Grating, n×N N×1 optical switches, N 1×n PIN optical receiving array devices, parallel optical fiber array, parallel optical waveguide array;

The data chip is used to send and receive electrical signals, and the electrical signals sent by the i-th data chip are I _i1 , I _i2 ,...,I _in , i=1,2,...,N; The electrical signals of the data chip are rearranged into n groups of electrical signals, and the jth group of electrical signals is I _1j , I _2j ,...,I _Nj , j=1,2,...,n;

The VCSEL light-emitting array device and the PIN light-receiving array device are multiple parallel light-emitting and receiving array devices, and the VCSEL light-emitting array device is used to realize electrical/optical conversion of rearranged electrical signals, so The PIN optical receiving array device is used to realize the optical/electrical conversion of the recombined optical signal;

The MT coupling interface is located between the VCSEL light-emitting array device and the phase calculation holographic grating, between the phase calculation holographic grating and the optical switch, and is used to realize optical communication between the optical fiber array and the optical waveguide array. coupling;

The phase calculation holographic grating is used as an optical beam splitter, and the parallel optical signals passed through the parallel optical waveguide array are input to the phase calculation holographic grating and then copied into N copies at the same time;

Each optical switch is used to select one channel of optical signal output, and the output optical signals are recombined according to the requirements of optical interconnection and switching.

In the embodiment of the present invention, 4-chip EOPCB is selected, and the fully interconnected optical switching of 4×4 parallel optical signals between chips is described.

FIG. 2 is a schematic structural diagram of an EOPCB board based on a fully interconnected optical network provided by an embodiment of the present invention. As shown in Figure 2, the EOPB based on the fully interconnected optical network includes: 4 data chips 1 to 4, 4 1×4 VCSEL optical emission array devices, 4 1×4MT coupling interfaces, and 1 1×4 phase Computational holographic gratings, 16 1×4MT coupling interfaces, 16 4×1 optical switches, 4 1×4PIN optical receiving devices, parallel optical fiber arrays, and parallel polymer optical waveguide arrays.

Data chips 1-4 are used to send and receive electrical signals. The electrical signals sent by data chip 1 are I ₁₁ ˜I ₁₄ , the electrical signals sent by data chip 2 are I ₂₁ ˜I ₂₄ , the electrical signals sent by data chip 3 are I ₃₁ ˜I ₃₄ , and the electrical signals sent by data chip 4 are I ₄₁ ~I ₄₄ . In order to avoid the crosstalk caused by the cross wiring of the optical fiber array and the optical waveguide array on the EOPCB, the electrical signals of each data chip are rearranged at the input end. The rearranged 4 groups of electrical signals are shown in Figure 2: I ₁₁ , I ₂₁ , I ₃₁ , I ₄₁ ; I ₁₂ , I ₂₂ , I ₃₂ , I ₄₂ ; I ₁₃ , I ₂₃ , I ₃₃ , I ₄₃ ; I ₁₄ , I ₂₄ , I ₃₄ , I ₄₄ .

Fig. 3 is a schematic diagram of the EOPCB topology structure based on the fully interconnected optical network according to the embodiment of the present invention, and the multicast method between chips and chips is as follows:

In order to avoid the crosstalk caused by the cross wiring of the optical fiber array and the optical waveguide array on the EOPB, we rearrange the 4×10Gbit/s electrical signals of each data chip at the input end, as shown in Figure 3, the rearranged 4 groups The electrical signals are as follows: I ₁₁ , I ₂₁ , I ₃₁ , I ₄₁ ; I ₁₂ , I ₂₂ , I ₃₂ , I ₄₂ ; I ₁₃ , I ₂₃ , I ₃₃ , I ₄₃ ; I ₁₄ , I ₂₄ , I ₃₄ , I ₄₄ . The rearranged 4 sets of electrical signals respectively drive one of the 4 1×4 VCSEL light emitting arrays, and form 16 parallel 10Gbit/s optical signals through electrical/optical conversion. After coupling through the optical fiber array and the optical waveguide array, it is input to the 1×4 phase calculation holographic grating. After the phase calculation holographic grating is divided into beams, 4 copies are copied to form a parallel optical signal of 64×10Gbit/s. After coupling through the parallel optical waveguide, Sequentially input to 16 4×1MEMS optical switches, according to the requirements of optical interconnection and exchange, each 4×1MEMS optical switch selects 1 channel of 10Gbit/s optical signal output, and the output 16 optical signals are divided into 4 groups in turn, The 4×10Gbit/s optical signal arrays of each group are respectively input into four 1×4PIN optical receiving arrays to realize optical/electrical conversion. The converted four groups of 4×10 Gbit/s electrical signals are amplified by a transimpedance amplifier circuit (not shown), and then input in parallel to respective target data chips. The 4×4 node all-optical interconnection network of this embodiment has a single-chip bidirectional parallel transmission rate of up to 80Gbit/s, a system bandwidth of up to 320Gbit/s, and a broadcast function.

The above are only preferred specific implementation methods of the present application, but the scope of protection of the present application is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. All should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (3)

1. a kind of EOPCB based on totally interconnected optical-fiber network, which is characterized in that the EOPCB include: N number of data chip, n 1 × N VCSEL light emitting array device, MT coupling interface, 11 × N mutually calculate the holographic grating, n × photoswitch of N number of N × 1, N number of 1 × n PIN light-receiving array device, parallel optical fibre array, parallel optical waveguide array；

The data chip is I for sending and receiving electric signal, the electric signal that i-th of data chip is sent_i1, I_i2... I_in, i =1,2 ..., N；It carries out being rearranged for n group electric signal in electric signal of the input terminal to each data chip, jth group electric signal is I_1j, I_2j..., I_Nj, j=1,2 ..., n；

The VCSEL light emitting array device and the PIN light-receiving array device are multidiameter delay light emitting and reception array Device, for realizing the electrical/optical conversion of the electric signal after rearranging, the PIN light connects the VCSEL light emitting array device Array device is received for realizing the optical electrical conversion of the optical signal after reconfiguring；

The MT coupling interface is located at the VCSEL light emitting array device and mutually calculates between holographic grating with institute rheme, described VCSEL light emitting array device is connect with the MT coupling interface by the parallel optical fibre array, the MT coupling interface with Institute's rheme mutually calculates holographic grating by the parallel optical waveguide array connection, to realize between fiber array and optical waveguide Optical coupling；

Institute's rheme mutually calculates holographic grating as beam splitter, is input to by the parallel optical signal of parallel optical waveguide array described Position copies as N parts after mutually calculating holographic grating beam splitting simultaneously；

The MT coupling interface is located at institute's rheme and mutually calculates between holographic grating and the photoswitch, and institute's rheme mutually calculates holographic optical Grid are connect with the MT coupling interface by the parallel optical waveguide array, and the MT coupling interface and the photoswitch pass through institute Parallel optical fibre array connection is stated, to realize the optical coupling between optical waveguide and fiber array；

For selecting the output of 1 road optical signal in each photoswitch, by the demand that light network exchanges, the optical signal of output is carried out again Combination.

2. EOPCB according to claim 1, which is characterized in that optical waveguide array is polymeric optical waveguide array.

3. a kind of multicasting method of such as described in any item EOPCB of claim 1-2, which comprises the steps of:

S1. the electric signal after rearranging respectively drives one in VCSEL light emitting array device, converts and constitutes through electrical/optical Parallel optical signal；

S2. after the optical signal is by fiber array and optical waveguide array coupling, input mutually calculates holographic grating, Jing Weixiang in place After calculating holographic grating beam splitting, it is copied into N parts of parallel optical signals；

S3. optical signal after replicating through it is parallel it is optical waveguide coupled after, be separately input in photoswitch, by the need of light network exchange It asks, the output of 1 road optical signal is selected by each photoswitch, the optical signal of output is reconfigured again；

S4. the optical signal after reconfiguring is separately input in PIN light-receiving array device, is constituted through optical electrical conversion parallel Electric signal；

S5. it is input to respective target data chip parallel after the electric signal amplification after converting.