Optical switch and optical crossconnect apparatus
First Claim
1. A path switching apparatus of optical signals using optical circulators for outputting the optical signals inputted from a first port to a second port, from said second port to a third port, and from said third port to said first port, respectively, comprising:
- 2k first optical switches each of which has a fourth port, a fifth port, and a sixth port and can set a path of the optical signal between said fourth port and an arbitrary one of said fifth port and said sixth port;
a second optical switch and a third optical switch each of which has k seventh ports and k eighth ports and arbitrarily connects said seventh port and said eighth port in a one-to-one corresponding relational manner;
a fourth optical switch which has a ninth port having k ports and a tenth port having k ports and arbitrarily connects said ninth port and said tenth port in a one-to-one corresponding relational manner;
k first optical circulators in each of which said second port is connected to the seventh port of said second optical switch in a one-to-one corresponding relational manner and said third port is connected to the eighth port of said second optical switch in a one-to-one corresponding relational manner;
k second optical circulators in each of which said second port is connected to the seventh port of said third optical switch in a one-to-one corresponding relational manner and said third port is connected to the eighth port of said third optical switch in a one-to-one corresponding relational manner,wherein with respect to k of said first optical switches, said fifth port and a first port of said first optical circulator are connected in a one-to-one corresponding relational manner and said sixth port is connected to one of said ninth ports of said fourth optical switch in a one-to-one corresponding relational manner, andwith respect to remaining k of said first optical switches, said fifth port and a first port of said second optical circulator are connected in a one-to-one corresponding relational manner and said sixth port is connected to one of said tenth ports of said fourth optical switch in a one-to-one corresponding relational manner.
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Accused Products
Abstract
An optical switch is constructed by: first and second optical switches each having ports of k inputs and k outputs; a third optical switch of k inputs and k outputs which can perform a bi-directional transmission; 2k first optical circulators; 2k second optical circulators; and 2k selecting switches. First to kth interfaces are connected by the first optical switch. (k+1)th to 2kth interfaces are connected by the second optical switch. The first to kth interfaces are connected to one of the (k+1)th to 2kth interfaces by the third optical switch. An optical crossconnect apparatus is also provided.
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Citations
4 Claims
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1. A path switching apparatus of optical signals using optical circulators for outputting the optical signals inputted from a first port to a second port, from said second port to a third port, and from said third port to said first port, respectively, comprising:
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2k first optical switches each of which has a fourth port, a fifth port, and a sixth port and can set a path of the optical signal between said fourth port and an arbitrary one of said fifth port and said sixth port; a second optical switch and a third optical switch each of which has k seventh ports and k eighth ports and arbitrarily connects said seventh port and said eighth port in a one-to-one corresponding relational manner; a fourth optical switch which has a ninth port having k ports and a tenth port having k ports and arbitrarily connects said ninth port and said tenth port in a one-to-one corresponding relational manner; k first optical circulators in each of which said second port is connected to the seventh port of said second optical switch in a one-to-one corresponding relational manner and said third port is connected to the eighth port of said second optical switch in a one-to-one corresponding relational manner; k second optical circulators in each of which said second port is connected to the seventh port of said third optical switch in a one-to-one corresponding relational manner and said third port is connected to the eighth port of said third optical switch in a one-to-one corresponding relational manner, wherein with respect to k of said first optical switches, said fifth port and a first port of said first optical circulator are connected in a one-to-one corresponding relational manner and said sixth port is connected to one of said ninth ports of said fourth optical switch in a one-to-one corresponding relational manner, and with respect to remaining k of said first optical switches, said fifth port and a first port of said second optical circulator are connected in a one-to-one corresponding relational manner and said sixth port is connected to one of said tenth ports of said fourth optical switch in a one-to-one corresponding relational manner. - View Dependent Claims (2, 3, 4)
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Specification