Arrayed waveguide grating based modular interconnection networks and methods for constructing and applying the same

Patent metadata

Field	Value
Publication number	US-9490928-B2
Application number	US-201414557429-A
Country	US
Kind code	B2
Filing date	Dec 1, 2014
Priority date	Aug 20, 2014
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

An arrayed waveguide grating (AWG) based interconnection network and modular construction method, comprising N 1 left nodes, with each left node having N 2 ports, N 2 right nodes, with each right node having N 1 ports, where N 1 ≧N 2 , N 1 and N 2 having a greatest common divisor r, and each port having an optical transceiver associated with a fixed wavelength; N 1 n 2 r×1 wavelength multiplexers having their input ports respectively connected with the ports of N 1 left nodes, where n 2 =N 2 /r; N 2 n 1 1×r wavelength demultiplexers having their output ports respectively connected with the ports of N 2 right nodes, where n 1 =N 1 /r; n 1 n 2 r×r AWGs connecting the r×1 wavelength multiplexers and the 1×r wavelength demultiplexers r×rn 1 n 2 , and each of the r×r AWGs being associated with a wavelength subset {λ k |k=0, 1, . . . , r−1}.

First claim

We claim:

1. A method for constructing an interconnection network, comprising:
providing N 1 N 2 ×1 wavelength multiplexers, labeled by L 0 , L 1 , . . . , L N _ −1 , for N 1 left nodes, an ith N 2 ×1 wavelength multiplexer having its jth input port connected with a jth port of an ith left node, and a jth port of the ith left node is associated with a wavelength

λ

[

i
+
j

]

N
1

,

wherein i=0, 1, . . . , N 1 −1, j=0, 1, . . . , N 2 −1;
providing N 2 1×N 1 wavelength demultiplexers labeled by R 0 , R 1 , . . . , R N 2 − 1 , for N 2 right nodes, a jth 1×N 1 wavelength demultiplexer having its ith output port connected separately with an ith port of a jth right node, and an ith port of a jth right node is associated with wavelength

λ

[

i
+
j

]

N
1

;

interconnecting the N 1 wavelength multiplexers on the left with the N 2 wavelength demultiplexers on the right via the N 1 ×N 2 AWG, the N 1 ×N 2 AWG having the N 1 input ports and the N 2 output ports, and being associated with the wavelength set Λ={λ 0 , λ 1 , . . . , λ N 1 −1 };
decomposing the N 1 ×N 2 AWG to a three-stage AWG network S A (n 1 , r 1 , m A , n 2 , r 2 ),
wherein the AWG network S A comprises N 1 =r 1 n 1 input ports on an input side, with each input port being a 1×n 2 wavelength demultiplexer, and N 2 =r 2 n 2 output ports on an output side, with each output port being an n 1 ×1 wavelength multiplexer, m A r 1 ×r 2 AWGs in the central stage, wherein r 1 =r 2 =r, n 1 =N 1 /r, n 2 =N 2 /r, and m A =n 1 n 2 ;
an ith input port is labeled by D A1 (α A , a A ), wherein α A =└i/n 1 ┘ and a A =[i] n 2 , and a jth output port is labeled by M A1 (β A , b A ), wherein β A =└j/n 2 ┘ and b A =[j] n 2 , and each of the AWGs in the central stage is labeled by G A1 (α A , b A ); the α A th input port of G A1 (α A , b A ) is connected with the b A th output port of D A1 (α A , a A ), the β A th output port of G A1 (α A , b A ) is connected with the α A th input port of M A1 (β A , b A ), and G A1 (α A , b A ) is associated with a wavelength subset

Λ

[

a
A

+

b
A

]

n
1

=

{

λ

[

a
A

+

b
A

]

n
1

⁢
r

+
k

|
k

=
0

,
1
,
…
⁢

,

r
-
1

}

;

replacing the ith N 2 ×1 wavelength multiplexer L i and the 1×n 2 wavelength demultiplexer D A1 (α A , a A ) with n 2 r×1 wavelength multiplexers, each of the r×1 wavelength multiplexers is labeled by D A2 (α A , a A , b A );
replacing the jth 1×N 1 wavelength demultiplexer R j and the n 1 ×1 wavelength multiplexer M A1 (β A , b A ) with n 1 r×1 wavelength demultiplexers, each of the r×1 wavelength demultiplexers being labeled by M A2 (β A , b A , α A ); and
associating each r 1 ×r 2 AWG, labeled by G A2 (α A , b A ), with a wavelength subset {λ k |k=0, 1, . . . , r−1};
wherein the output port of D A2 (α A , a A , b A ) is connected with the α A th input port of G A2 (α A ,b A ), and the input port of M A2 (β A , b A , α A ) is connected with the β A th output port of G A2 (α A , b A ).

2. An AWG-based modular interconnection network according to claim 1 , comprising:
left nodes, a number of the left nodes being N 1 , and each of the left nodes having N 2 ports,
right nodes, a number of the right nodes being N 2 , and each of the right nodes having N 1 ports,
an optical transceiver associated with a fixed wavelength on each port of the left and right nodes,
r×1 wavelength multiplexers, a number of the r×1 wavelength multiplexers being N 1 n 2 , each of the n 2 r×1 wavelength multiplexers having N 2 input ports being connected with the N 2 ports of one of the left nodes, and n 2 =N 2 /r,
1×r wavelength demultiplexers, a number of the 1×r wavelength demultiplexers being N 2 n 1 , each of the n 1 1×r wavelength demultiplexers having N 1 output ports being connected with the N 1 ports of one of the right nodes, and n 1 =N 1 /r, and
r×r AWGs connecting the r×1 wavelength multiplexers and the 1×r wavelength demultiplexer, a number of the r×r AWGs being n 1 n 2 , each of the r×r AWGs being associated with a wavelength subset {λ k |k=0, 1, . . . , r−1},
where N 1 ≧N 2 , N 1 and N 2 are integers that have a greatest common divisor r, and r>1.

3. The method as claimed in claim 1 , further comprising:
replacing the AWG in the central stage with a module constituted of a network AWG of three stages.

4. A method for constructing an interconnection network, comprising:
providing N 1 N 2 ×1 wavelength multiplexers, labeled by

Assignees

• Univ Shanghai Jiaotong

Inventors

• Ye Tong
• Lee Tony T
• Hu Weisheng

Classifications

• H04Q2011/0016

  using wavelength multiplexing or demultiplexing · CPC title

• H04Q2011/0032

  using static wavelength routers (e.g. arrayed waveguide grating router [AWGR] ) · CPC title

• H04J14/0279 Primary

  WDM point-to-point architectures · CPC title

• H04L49/00

  Packet switching elements · CPC title

• H04J14/0267 Primary

  Optical signaling or routing · CPC title