OPTICAL TRANSMISSION DEVICE, METHOD FOR VERIFYING CONNECTION, AND WAVELENGTH SELECTIVE SWITCH CARD

• US 20160315701A1
• Filed: 04/05/2016
• Published: 10/27/2016
• Est. Priority Date: 04/24/2015
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Kiyama, Atsushi, YUKI, Masahiro, MATSUKAWA, Yoshinobu
• Application Number:
  US15/091,040
• Publication Number:
  US 20160315701A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 10/0773 Network aspects, e.g. central monitoring of transmission parameters
• CPC Class Codes: H04B 10/0775 Performance monitoring and measurement of transmission parameters
• CPC Class Codes: H04J 14/0212 using optical switches or wavelength selective switches [WSS]
• CPC Class Codes: H04J 14/0221 Power control, e.g. to keep the total optical power constant

Abstract

An optical transmission device according to an aspect of the present invention includes a plurality of substrate modules that are optically connected to one another. A first substrate module in the plurality of substrate modules includes a light generator generating a test light and a first optical switch transferring the generated test light. A second substrate module in the plurality of substrate modules includes a second optical switch looping back, to the first substrate module, the test light transferred from the first substrate module.

Claims

1. An optical transmission device comprising a plurality of substrate modules that are optically connected to one another, wherein

a first substrate module in the plurality of substrate modules includes

a light generator configured to generate a test light and

a first optical switch configured to transfer the generated test light, and

a second substrate module in the plurality of substrate modules includes a second optical switch configured to loop back, to the first substrate module, the test light transferred from the first substrate module.

2. The optical transmission device according to claim 1, wherein

the second substrate module transfers light other than a test light to a substrate module other than the first substrate module.

3. The optical transmission device according to claim 1, further comprising:

a plurality of power measuring devices configured to each measure optical powers at a plurality of measurement points on a route through which the test light is transmitted; and

a controller configured to control an operation of at least one of the plurality of substrate modules, wherein

the controller verifies a connection between the first substrate module and the second substrate module on the basis of a result of the measurement performed by the plurality of power measuring devices.

4. The optical transmission device according to claim 3, wherein

the controller identifies, on the basis of the result of the measurement performed by the plurality of power measuring devices, a portion in which a connection between the first substrate module and the second substrate module is anomalous.

5. The optical transmission device according to claim 3, wherein

the first substrate module includes a data regenerator configured to regenerate data from a test light that returns from the second substrate module, and

the controller verifies a connection between the first substrate module and the second substrate module on the basis of a result of comparing data included in a test light generated by the light generator with data regenerated by the data regenerator.

6. A connection verifying method for verifying a connection in an optical transmission device that includes a plurality of substrate modules that are optically connected to one another, the connection verifying method comprising:

generating, by a light, a test light using a first substrate module in the plurality of substrate modules;

transferring, by a first optical switch, the test light using a first optical switch included in the first substrate module; and

looping back, by a second optical switch, to the first substrate module, the test light transferred from the first substrate module using a second optical switch included in a second substrate module in the plurality of substrate modules.

7. A wavelength selective switch card comprising:

an input port configured to be input a signal light;

a light generator configured to generate a test light;

a wavelength selective switch that includes a first input port configured to be input the signal light is input, a second input port configured to be input the test light, and a plurality of output ports each of which is configured to output either the signal light or the test light;

a plurality of branching units configured to branch pieces of light output from the plurality of output ports;

a combining unit configured to combine pieces of light obtained by the branching; and

a monitoring unit configured to monitor light output from the combining unit.