Arrayed waveguide grating based multi-core and multi-wavelength short-range interconnection network

Abstract

An arrayed waveguide grating (AWG) based multi-core and multi-wavelength interconnection network, comprising N upper-level switches, N lower-level switches, and a network intermediate stage, with each upper- and lower-level switches has N CWDM optical transceiving modules. The N optical transceiving modules of each upper-level switch is connected with n m?1 multi-core optical multiplexing modules, the N optical transceiving modules of each lower-level switch is connected with n 1?m multi-core demultiplexing modules, the network intermediate stage is comprised of n.sup.2 r?r multi-core and multi-wavelength wiring modules. The upper-level multi-core optical multiplexing modules, the lower-level multi-core demultiplexing modules, and the n.sup.2 r?r multi-core and multi-wavelength wiring modules of the network intermediate stage are connected via an m-core MPO-MPO optical fiber jumper. The wiring complexity of the interconnection network is O(N.sup.2/r), with employment of a wavelength set of ?={?.sub.0, . . . , ?.sub.k-1}. The present invention conserves wavelength resources of communication windows, enhances scalability of the AWG based interconnection network, while reduces network wiring complexity.

Claims

1. An array-waveguide grating (AWG) based multi-core and multi-length short-range interconnection network based for a wavelength set of ?={?.sub.0, ?.sub.1, . . . , ?.sub.k-1}, comprising N number of upper-level switches, N number of lower-level switches, and a network intermediate stage, wherein each of the upper-level switches and each of the lower-level switches has N number of CWDM optical transceiving modules, the N optical transceiving modules of each of the upper-level switches is connected with n number of m?1 multi-core optical multiplexing modules, the N optical transceiving modules of each of the lower-level switches is connected with n number of 1?m multi-core demultiplexing modules, the network intermediate stage comprises n.sup.2 number of r?r multi-core and multi-wavelength wiring modules, the n number of the multi-core optical multiplexing modules of the upper-level switches, the n number of the multi-core demultiplexing modules of the lower-level switches, and the n.sup.2 number of the r?r multi-core and multi-wavelength wiring modules of the network intermediate stage are connected via m-core MPO-MPO optical fiber jumpers, wherein r=mk, k is a number of wavelengths of the wavelength set ?, m is a number of the jumpers of the MPO-m core optical fiber branch jumpers; the n.sup.2 number of the r?r multi-core and multi-wavelength wiring modules are constructed via the MPO-m core optical fiber branch jumpers and m.sup.2 number of k?kAWGs; each r?r multi-core and multi-wavelength wiring module comprises r number of upper ports having r number of MPO multi-core optical fiber connectors, the intermediate stage having m.sup.2 number of k?kAWGs, and r number of lower ports having r number of MPO multi-core optical fiber connectors; wherein the upper ports, the lower ports, and the intermediate stage are connected via the MPO-m core optical fiber branch jumpers, wherein r=mk, k is the number of wavelengths of the wavelength set ?, m is the number of the jumpers of the MPO-m core optical fiber branch jumpers; each m?1 multi-core optical multiplexing module connects each output port of m identical k?1 optical multiplexors to a same MPO-m core optical fiber branch jumper, with the dth k?1 optical multiplexor being connected with the dth core of the MPO-m core optical fiber branch jumper, wherein d=0, 1, . . . , m?1, each k?1 optical multiplexor being correlated with the wavelength set ?={?.sub.0, ?.sub.1, . . . , ?.sub.k-1}, an input port p of the k?1 optical multiplexor being correlated with a wavelength ?.sub.p, and p=0, 1, . . . , k?1; and each 1?m multi-core optical demultiplexing module connects each input port of m identical 1?k optical demultiplexors to a same MPO-m core optical fiber branch jumper, with the cth 1?k optical multiplexor being connected with the cth core of the MPO-m core optical fiber branch jumper, wherein c=0, 1, . . . , m?1, each 1?k optical demultiplexor being correlated with the wavelength set ?={?.sub.0, ?.sub.1, . . . , ?.sub.k-1}, an output port q of the 1?k optical demultiplexor being correlated with a wavelength ?.sub.q, and q=0, 1, . . . , k?1.

2. The AWG-based multi-core and multi-length short-range interconnection network as described in claim 1, wherein the r?r multi-core and multi-wavelength wiring module of the intermediate stage is a three-level network module, the three-level module has an intermediate stage being constructed of m.sup.2 number of identical k?kAWGs, each AWG is correlated with ?={?.sub.0, ?.sub.1, . . . , ?.sub.k-1}, each k?k AWG is labeled with a number, with the c?m+dth AWG being labeled as B(c,d), c,d=0, 1, . . . m?1, and the ports of the module and the k?kAWGs are connected via the MPO-m core optical fiber branch jumpers; the dth core of the MPO-m core optical fiber branch jumper of the ?th upper port is connected with the ?th upper port of B(c,d), the cth core of the MPO-m core optical fiber branch jumper of the ?th lower port is connected with the ?th lower port of B(c,d), and c=[a/k], d=[?/k], ?=[?].sub.k, and ?=[?].sub.k.

3. The AWG-based N?N multi-core and multi-length short-range interconnection network as described in claim 1, wherein the N?N multi-core and multi-length short-range interconnection network is a three-level network having an intermediate stage; the intermediate stage of the three-level network comprises n.sup.2 number of r?r multi-core and multi-wavelength wiring modules; each r?r multi-core and multi-wavelength wiring module is labeled with a number, with the a?n+bth r?r multi-core and multi-wavelength wiring module being labeled as A(a,b), wherein a=[i/r], b=[j/r], the bth m?1 multi-core optical multiplexing module of the ith upper-level switch u.sub.i is connected via an m core MPO-MPO optical fiber jumper with an upper port ? of A(a,b), a lower port ? of A(a,b) is connected via an m core MPO-MPO optical fiber jumper with the ?th 1?m multi-core optical demultiplexing module of the jth lower-level switch r.sub.j, and ?=[i].sub.r, ?=[j].sub.r.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic diagram showing a r?r multi-core and multi-wavelength wiring module of the present invention.

(2) FIG. 2 is a schematic diagram showing a m?1 multi-core optical multiplexing module of the present invention.

(3) FIG. 3 is a schematic diagram showing a 1?m multi-core optical demultiplexing module of the present invention.

(4) FIG. 4 is a schematic diagram showing an N?N multi-core and multi-length short-range interconnection network based on AWG of the present invention.

(5) FIG. 5 is a schematic diagram showing a 4?4 multi-core and multi-wavelength wiring module of the present invention.

(6) FIG. 6 is a schematic diagram showing a 2?1 multi-core optical multiplexing module of the present invention.

(7) FIG. 7 is a schematic diagram showing a 1?2 multi-core optical demultiplexing module of the present invention.

(8) FIG. 8 is a schematic diagram showing an AWG-based 8?8 multi-core and multi-length short-range interconnection network as one embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION AND EMBODIMENTS

(9) The present invention is expounded in details with the figures and embodiments hereunder provided. The embodiments are meant to enunciate the present invention, but not to limit the scope of the present invention. A person of the art may modify the present invention in various equivalent forms after perusal of the present invention, all of which still fall within the scope of the claims of the present invention.

(10) As shown in FIG. 4, a schematic diagram of an N?N multi-core and multi-length short-range interconnection network based on AWG of the present invention, am AWG-based multi-core and multi-length short-range interconnection network that is applicable for a wavelength set of ?={?.sub.0, ?.sub.1, . . . , ?.sub.k-1} of the present invention comprises N upper-level switches, N lower-level switches, and a network intermediate stage, with each upper-level switch and lower-level switch both having N CWDM optical transceiving modules, the N optical transceiving modules of each upper-level switch being connected with n m?1 multi-core optical multiplexing modules (as shown in FIG. 2), the N optical transceiving modules of each lower-level switch being connected with n 1?m multi-core demultiplexing modules (as shown in FIG. 3), the network intermediate stage being comprised of n.sup.2 r?r multi-core and multi-wavelength wiring modules, the upper-level multi-core optical multiplexing modules, the lower-level multi-core demultiplexing modules, and the n.sup.2 r?r multi-core and multi-wavelength wiring modules of the network intermediate stage being connected via m-core MPO-MPO optical fiber jumpers; wherein r=ink, k being a number of wavelengths of the wavelength set ?, m being a number of jumpers of the MPO-m core optical fiber branch jumpers.

(11) The n.sup.2 r?r multi-core and multi-wavelength wiring modules are constructed via the MPO-m core optical fiber branch jumpers and m.sup.2 k?kAWGs, wherein k being the number of wavelengths of the wavelength set ?, each r?r multi-core and multi-wavelength wiring module (as shown in FIG. 1) comprising r upper ports comprising r MPO multi-core optical fiber connectors, the intermediate stage constituted of m.sup.2 k?kAWGs, and r lower ports comprising r MPO multi-core optical fiber connectors, the upper ports, the lower ports, and the intermediate stage being connected via the MPO-m core optical fiber branch jumpers; wherein r=mk, k being the number of wavelengths of the wavelength set ?, m being the number of jumpers of the MPO-m core optical fiber branch jumpers;

(12) the m?1 multi-core optical multiplexing module connects each output port of m identical k?1 optical multiplexors to the same MPO-m core optical fiber branch jumper, with the dth k?1 optical multiplexor being connected with the dth core of the MPO-m core optical fiber branch jumper, wherein d=0, 1, . . . , m?1, each k?1 optical multiplexor being correlated with the wavelength set ?={?.sub.0, ?.sub.1, . . . , ?.sub.k-1}, the input port p being correlated with a wavelength ?.sub.p, wherein p=0, 1, . . . , k?1;

(13) the 1?m multi-core optical demultiplexing module connects each input port of m identical 1?k optical demultiplexors to the same MPO-m core optical fiber branch jumper, with the cth 1?k optical multiplexor being connected with the cth core of the MPO-m core optical fiber branch jumper, wherein c=0, 1, . . . , m?1, each 1?k optical demultiplexor being correlated with the wavelength set ?={?.sub.0, ?.sub.1, . . . , ?.sub.k-1}, the output port q being correlated with the wavelength ?.sub.q, wherein q=0, 1 . . . , k?1.

(14) The r?r multi-core and multi-wavelength wiring module of the intermediate stage is a three-level network module, with the intermediate stage of the module being constructed of m.sup.2 identical k?kAWGs, each AWG being correlated with ?={?.sub.0, ?.sub.1, . . . , ?.sub.k-1}, each k?kAWG being labeled with a number, with the c?m+dth AWG being labeled as B(c,d), wherein c,d=0, 1, . . . m?1, the ports of the module and the k?kAWGs being connected via the MPO-m core optical fiber branch jumpers. The dth core of the MPO-m core optical fiber branch jumper of the ?th upper port is connected with the ?th upper port of B(c,d), the cth core of the MPO-m core optical fiber branch jumper of the ?th lower port is connected with the ?th lower port of B(c,d), wherein c=[?/k], d=[?/k], ?=[?].sub.k, and ?=[?].sub.k.

(15) FIG. 8 is a schematic diagram showing an embodiment of the present invention. The embodiment, wherein r=4, m=2, k=2, and n=2, comprises the following constructing steps:

(16) (1) constructing a 4?4 multi-core and multi-wavelength wiring module: as shown in FIG. 5, the module is an encapsulated standard module comprised of r=4 upper ports and r=4 lower ports, with the intermediate stage being comprised of m.sup.2=2.sup.2=4 identical 2?2AWGs, each AWG being correlated with the wavelength set {?.sub.0, ?.sub.1}. The c?m+dth 2?2AWG is labeled as B(c,d), wherein c,d=0, 1. The ports of the module and the 2?2AWGs are connected via the MPO-2 core optical fiber branch jumpers. The dth core of the MPO-2 core optical fiber branch jumper of the ?th upper port is connected with the ?th upper port of B(c,d), the cth core of the MPO-2 core optical fiber branch jumper of the ?th lower port is connected with the ?th lower port of B(c,d), wherein c=[?/k]=[?/2], d=[?/k]=[?/2], ?=[?].sub.k=[?].sub.2, and ?=[?].sub.k=[?].sub.2. For example, B(1,0) is the c?m+d=1?2+0=2th 2?2AWG of the multi-core and multi-wavelength wiring module. The d=[?/k]=[1/2]=0th core of the MPO-2 core optical fiber branch jumper of the ?=2th upper port is connected with the ?=[?].sub.k=[2].sub.2=0th upper port of B(1,0), the c=[?/k]=[2/2]=1th core of the MPO-2 core optical fiber branch jumper of the ?=1th lower port is connected with the ?=[?]=[1].sub.2=ith lower port of B(1,0);

(17) (2) constructing the 2?1 multi-core optical multiplexing module: connecting each output port of m=2 identical 2?1 optical multiplexors to the same MPO-2 core optical fiber branch jumper, with the dth 2?1 optical multiplexor being connected with the dth core of the MPO-2 core optical fiber branch jumper, wherein d=0, 1, as shown in FIG. 6, each 2?1 optical multiplexor being correlated with the wavelength set {?.sub.0, ?.sub.1}, the input ports 0 and 1 of the 2?1 optical multiplexor being correlated respectively with the wavelengths ?.sub.0 and ?.sub.1;

(18) (3) constructing the 1?2 multi-core optical demultiplexing module: connecting each input port of m=2 identical 1?2 optical multiplexors to the same MPO-2 core optical fiber branch jumper, with the cth 1?2 optical multiplexor being connected with the cth core of the MPO-2 core optical fiber branch jumper, wherein c=0, 1, as shown in FIG. 7, each 1?2 optical demultiplexor being correlated with the wavelength set {?.sub.0, ?.sub.1}, the output ports 0 and 1 of the 1?2 optical demultiplexor being correlated respectively with the wavelengths ?.sub.0 and ?.sub.1;

(19) (4) constructing the 8?8 multi-core and multi-length short-range interconnection network based on AWG: as shown in FIG. 8, the network comprises N=8 upper-level switches labeled as u.sub.0, u.sub.1, . . . , u.sub.7, N=8 lower-level switches labeled as v.sub.0, v.sub.1, . . . , v.sub.7. Each upper-level switch and lower-level switch both has N=8 CWDM optical transceiving modules, spacing of the channels of the optical transceiver being determined according to specific application scenarios. The 8 optical transceiving modules of each upper-level switch being connected with n=2 2?1 multi-core optical multiplexing modules, the 8 optical transceiving modules of each lower-level switch being connected with n=2 1?2 multi-core demultiplexing modules, the network intermediate stage being comprised of n.sup.2=2.sup.2=4 4?4 multi-core and multi-wavelength wiring modules. The a?n+bth multi-core and multi-wavelength wiring module is labeled as A(a,b), wherein a=[i/r]=[i/4], b=[j/r]=[j/4]. The bth 2?1 multi-core optical multiplexing module of the ith upper-level switch u is connected via a 2 core MPO-MPO optical fiber jumper with an upper port ? of A(a,b), a lower port f of A(a,b) is connected via an 2 core MPO-MPO optical fiber jumper with the ?th 1?2 multi-core optical demultiplexing module of the jth lower-level switch v.sub.j, wherein ?=[i].sub.r=[i].sub.4, ?=[j].sub.r=[j].sub.4. Connection of the upper-level switch with the lower-level switch is established via the wavelengths ?.sub.x, wherein i, j=0, 1, . . . , 7, ?.sub.x??, and x=[?+?].sub.k=[?+?].sub.2. For example, the a?n+b=1?2+0=2th multi-core and multi-wavelength wiring module is labeled as A(1,0). The b=[1/4]=0th 2?1 multi-core optical multiplexing module of the upper-level switch u.sub.6 is connected via a 2 core MPO-MPO optical fiber jumper with an upper port ?=2 of A(1,0), a lower port ?=1 of A(1,0) is connected via an 2 core MPO-MPO optical fiber jumper with the a=[6/4]=1th 1?2 multi-core optical demultiplexing module of the lower-level switch v.sub.1. Connection of the upper-level switch u.sub.6 with the lower-level switch v.sub.1 is established via the wavelengths ?.sub.x=?.sub.1 (x=[?+?].sub.k=[2+1].sub.2=1).

(20) The embodiment of the present invention having the AWG-based 8?8 multi-core and multi-length short-range interconnection network employs MPO-2 core optical fiber branch jumpers and 2?2AWGs with fewer ports to construct the 4?4 multi-core and multi-wavelength wiring modules, and interconnects the 4?4 multi-core and multi-wavelength wiring modules to construct the 8?8 interconnection network. In the embodiment, in contrast to the prior art AWG wiring schemes mentioned in the present invention, the present invention further reduces the AWG scale in half, under the same prerequisite of reduction of the network wiring complexity in half, thus conserving half of the wavelength resources.