Crosstalk measuring method, and crosstalk measuring device
AssigneeFujikura Ltd.
InventorsKatsuhiro Takenaga, Mayu Nakagawa, Masaki Ohzeki
Life of this patent
Estimating the term…
Abstract
A crosstalk measuring method for an optical device includes optically connecting one end of a first optical waveguide to one end of a second optical waveguide via a first connection optical waveguide, inputting pulsed incident light emitted from an OTDR into the other end of the first optical waveguide, outputting, from the other end of the first optical waveguide, first output light including pulsed light in which first crosstalk light is multiplexed with second crosstalk light, measuring power of the first output light, and calculating a magnitude of crosstalk between the first optical waveguide and the second optical waveguide based on the measured power of the first output light.
Claims13
A crosstalk measuring method for an optical device including a first optical waveguide and a second optical waveguide parallel to the first optical waveguide, the crosstalk measuring method comprising:
- optically connecting one end of the first optical waveguide to one end of the second optical waveguide via a first connection optical waveguide;
- inputting pulsed incident light emitted from an optical time domain reflectometer (OTDR) into the other end of the first optical waveguide;
- outputting, from the other end of the first optical waveguide, first output light including pulsed light in which first crosstalk light is multiplexed with second crosstalk light, wherein
- the first crosstalk light is generated by crosstalk of the pulsed incident light from the first optical waveguide to the second optical waveguide when the pulsed incident light enters the first optical waveguide from the ODTR, and
- the second crosstalk light is generated by crosstalk of the pulsed incident light from the second optical waveguide to the first optical waveguide when the pulsed incident light enters the second optical waveguide from the first optical waveguide via the first connection optical waveguide;
- measuring power of the first output light;
- and
- calculating a magnitude of crosstalk between the first optical waveguide and the second optical waveguide based on the measured power of the first output light.
A crosstalk measuring device for an optical device including a first optical waveguide and a second optical waveguide parallel to the first optical waveguide, the crosstalk measuring device comprising:
- a connection optical waveguide that optically connects one end of the first optical waveguide to one end of the second optical waveguide;
- an optical time domain reflectometer (OTDR) that:
- causes pulsed incident light to enter the other end of the first optical waveguide, and
- measures power of output light, including pulsed light in which first crosstalk light is multiplexed with second crosstalk light, from the other end of the first optical waveguide, wherein
- the first crosstalk light is generated by crosstalk of the pulsed incident light from the first optical waveguide to the second optical waveguide when the pulsed incident light enters the first optical waveguide, and
- the second crosstalk light is generated by crosstalk of the pulsed incident light from the second optical waveguide to the first optical waveguide when the pulsed incident light enters the second optical waveguide from the first optical waveguide via the connection optical waveguide;
- and
- a processor that calculates a magnitude of crosstalk between the first optical waveguide and the second optical waveguide based on the measured power of the output light.
Dependencies are inferred from the claim text.