Equipment and methods for evaluating the characteristics of spatial multiplex optical transmission lines
AssigneeNippon Telegraph and Telephone Corporation
InventorsShingo ONO, Atsushi NAKAMURA
Life of this patent
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Abstract
A backscattered light intensity measurement unit is presented that acquires a combination of backscattered light intensities of individual transmittable spatial channels of an optical fiber obtained when test light, for the respective transmittable spatial channels of the optical fiber, is incident on the optical fiber, and a transfer matrix calculation unit that calculates a transfer matrix for each section of the optical fiber in order from a side closer to an incident end of the test light, in which characteristics in a section of the optical fiber are evaluated by using the transfer matrix.
Claims7
An apparatus comprising:
- a backscattered light intensity measurement unit that acquires a combination of backscattered light intensities of individual transmittable spatial channels of an optical fiber obtained when test light, for the individual transmittable spatial channels of the optical fiber, is incident on the optical fiber;
- and
- a transfer matrix calculation unit that calculates a transfer matrix for each section of the optical fiber in order from a side closer to an incident end of the test light, wherein
- characteristics in a section of the optical fiber are evaluated by using the transfer matrix.
A method comprising the following sequence of steps:
- a backscattered light intensity distribution measurement step of acquiring a combination of backscattered light intensities of individual transmittable spatial channels of an optical fiber obtained when test light, for the individual transmittable spatial channels of the optical fiber, is incident on the optical fiber;
- a transfer matrix calculation step of calculating a transfer matrix for each section of the optical fiber in order from a side closer to an incident end of the test light;
- and
- an evaluation step of evaluating characteristics in a section of the optical fiber by using the transfer matrix.
Dependencies are inferred from the claim text.