Measuring device, measuring method, and electronic device
Provided is an apparatus to properly measure the bending amount of an optical waveguide routed in an electronic device or the like. An optical signal outputted with a second wavelength from the optical waveguide is received by a light receiving unit. In this case, the optical waveguide allows propagation only in a basic mode at a first wavelength and the second wavelength is a wavelength where the optical waveguide allows propagation at least in a primary mode in addition to a basic mode. The bending amount of the optical waveguide is obtained by a processing unit on the basis of the amount of a primary mode component included in the optical signal with the second wavelength.
1 . A measuring device, comprising:
an optical connector configured to:
receive an optical signal outputted with a second wavelength from an optical waveguide, wherein
the optical waveguide allows propagation only in a basic mode at a first wavelength, and
the second wavelength is a wavelength where the optical waveguide allows propagation in at least one of a primary mode or the basic mode; and
input, to the optical waveguide, an optical signal indicating start and an optical signal indicating termination; and
a processing unit configured to perform a process to obtain a bending amount of the optical waveguide, wherein
the bending amount is obtained based on an amount of a primary mode component of the primary mode,
the primary mode component is included in the optical signal with the second wavelength, and
the input of the optical signal indicating the termination is based on the process that is terminated in a state in which the optical connector has received the optical signal with the second wavelength.
2 . The measuring device according to claim 1 , wherein
the processing unit is further configured to obtain the bending amount of the optical waveguide by use of a ratio of an amount of the primary mode component included in the optical signal with the second wavelength and an amount of a basic mode component, of the basic mode, included in the optical signal with the second wavelength.
3 . The measuring device according to claim 2 , wherein the processing unit comprises:
a mode separation unit configured to separate the primary mode component and the basic mode component from the optical signal with the second wavelength;
a first electric conversion unit configured to convert the primary mode component into an electric signal;
a second electric conversion unit configured to convert the basic mode component into an electric signal;
an arithmetic unit configured to determine a level ratio of an output of the first electric conversion unit and an output of the second electric conversion unit as a ratio of the amount of the primary mode component and the amount of the basic mode component; and
a conversion unit configured to convert the level ratio determined by the arithmetic unit into the bending amount of the optical waveguide, wherein the conversion is based on
relationship information about the bending amount of the optical waveguide, and
the ratio of the amount of the primary mode component and the amount of the basic mode component.
4 . The measuring device according to claim 1 , wherein the processing unit is further configured to start the process based on start of the reception of the optical signal with the second wavelength.
5 . The measuring device according to claim 4 , wherein the processing unit is further configured to terminate the process based on termination of the reception of the optical signal with the second wavelength.
6 . The measuring device according to claim 1 , wherein the optical connector is further configured to input, based on a user instruction operation, the optical signal indicating the start to the optical waveguide.
7 . The measuring device according to claim 1 , wherein the optical connector is further configured to terminate the input of the optical signal indicating the start to the optical waveguide, based on start of the reception of the optical signal with the second wavelength.
8 . The measuring device according to claim 1 , wherein the processing unit is further configured to terminate the process automatically one of at completion of a series of operations or based on a user instruction operation.
9 . The measuring device according to claim 1 , further comprising
a determination unit configured to determine appropriateness of routing of the optical waveguide based on the bending amount of the optical waveguide.
10 . The measuring device according to claim 9 , wherein
the determination unit is further configured to determine the appropriateness of the routing of the optical waveguide based on whether the bending amount of the optical waveguide is equal to or larger than a bending amount with a certain margin from a bending amount that rapidly reduces coupling efficiency.
11 . The measuring device according to claim 9 , further comprising
a display unit configured to display information including a result of the determination by the determination unit.
12 . The measuring device according to claim 11 , wherein the information includes at least one of the bending amount of the optical waveguide or a bending margin of the optical waveguide.
13 . A measuring method, comprising:
receiving an optical signal outputted with a second wavelength from an optical waveguide, wherein
the optical waveguide allows propagation only in a basic mode at a first wavelength, and
the second wavelength is a wavelength where the optical waveguide allows propagation in at least one of a primary mode or the basic mode;
inputting, to the optical waveguide, an optical signal indicating start and an optical signal indicating termination; and
performing processing for obtaining a bending amount of the optical waveguide, wherein
the bending amount is obtained based on an amount of a primary mode component of the primary mode,
the primary mode component is included in the optical signal with the second wavelength, and
the input of the optical signal indicating the termination is based on the processing that is terminated in a state in which the optical signal with the second wavelength is received.
14 . An electronic device, comprising:
an optical waveguide;
an optical connector, wherein
a first end of the optical waveguide is connected to the optical connector, and
the optical waveguide is configured to:
allow propagation only in a basic mode at a first wavelength; and
perform communications using light with a second wavelength where the optical waveguide allows propagation in at least one of a primary mode or the basic mode; and
an optical conversion unit configured to:
input an optical signal having only the basic mode with the second wavelength to a second end of the optical waveguide, based on an optical signal indicating start outputted from the second end of the optical waveguide, and
terminate the input of the optical signal having only the basic mode with the second wavelength to the second end of the optical waveguide based on an optical signal indicating termination outputted from the second end of the optical waveguide.
15 . The electronic device according to claim 14 , wherein the optical conversion unit is further configured to start the input of the optical signal having only the basic mode with the second wavelength to the second end of the optical waveguide based on a user instruction operation.
16 . The electronic device according to claim 14 , wherein the optical conversion unit is further configured to terminate the input of the optical signal having only the basic mode with the second wavelength to the second end of the optical waveguide based on a user instruction operation.