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

• US 10,063,337 B1
• Filed: 01/19/2018
• Issued: 08/28/2018
• Est. Priority Date: 11/01/2017
• Status: Expired due to Fees

• Current Assignee: Shanghai JIAO TONG University
• Original Assignee: Shanghai JIAO TONG University
• Inventors: Ye, Tong, Chen, Kui, He, Hao, Hu, Weisheng
• Primary Examiner(s): Vanderpuye, Ken N
• Assistant Examiner(s): Sanchez, Dibson
• Application Number:
  US15/876,083
• Time in Patent Office: 221 Days
• Field of Search: 398 43-103
• CPC Class Codes: H04B 10/2581 Multimode transmission
• CPC Class Codes: H04J 14/0209 Multi-stage arrangements, e.g. by cascading multiplexers or demultiplexers
• CPC Class Codes: H04J 14/04 Mode multiplex systems
• CPC Class Codes: H04J 14/052 using multicore fibre mode multiplex systems H04J14/04
• CPC Class Codes: H04Q 11/0005 Switch and router aspects
• CPC Class Codes: H04Q 11/0062 Network aspects
• CPC Class Codes: H04Q 2011/0016 using wavelength multiplexing or demultiplexing
• CPC Class Codes: H04Q 2011/0032 using static wavelength routers (e.g. arrayed waveguide grating router [AWGR] )
• CPC Class Codes: H04Q 2011/0049 Crosstalk reduction; Noise; Power budget
• CPC Class Codes: H04Q 2011/005 Arbitration and scheduling
• CPC Class Codes: H04Q 2011/0077 Labelling aspects, e.g. multiprotocol label switching [MPLS], G-MPLS, MPAS

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 n² 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 n² 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(N²/r), with employment of a wavelength set of Λ={λ₀, . . . , λ_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 Λ

={λ

₀, λ

₁, . . . , λ

_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 n² 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 n² 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 Λ

, m is a number of the jumpers of the MPO-m core optical fiber branch jumpers;

the n² number of the r×

r multi-core and multi-wavelength wiring modules are constructed via the MPO-m core optical fiber branch jumpers and m² 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 m² 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 Λ

, 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 Λ

={λ

₀, λ

₁, . . . , λ

_k-1}, an input port p of the k×

1 optical multiplexor being correlated with a wavelength λ

_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 Λ

={λ

₀, λ

₁, . . . , λ

_k-1}, an output port q of the 1×

k optical demultiplexor being correlated with a wavelength λ

_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 m² number of identical k×

kAWGs,

each AWG is correlated with Λ

={λ

₀, λ

₁, . . . , λ

_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 α

th upper port is connected with the γ

th upper port of B(c,d), the cth core of the MPO-m core optical fiber branch jumper of the β

th lower port is connected with the δ

th lower port of B(c,d), and c=[a/k], d=[β

/k], γ

=[α

]_k, and δ

=[β

]_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 n² 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_i is connected via an m core MPO-MPO optical fiber jumper with an upper port α

of A(a,b), a lower port β

of A(a,b) is connected via an m core MPO-MPO optical fiber jumper with the α

th 1×

m multi-core optical demultiplexing module of the jth lower-level switch r_j, and α

=[i]_r, β

=[j]_r.