Patent ID: 11936428
Assignee: FUJITSU OPTICAL COMPONENTS LIMITED
Field: Telecommunications (Electrical engineering)
Classification: CPC G  H | IPC H

Claim 11:
12. The optical device according to claim 1, further including:
an input unit that receives light;
a first branching unit that branches the light from the input unit;
a second branching unit that branches the light branched by the first branching unit;
two first optical waveguides on a forward path side at a leading stage as the first optical waveguide branched at the second branching unit;
a first electrode that applies a first electric signal to the two first optical waveguides on the forward path side at the leading stage;
a second optical waveguide at the leading stage as the second optical waveguide connected to the two first optical waveguides on the forward path side at the leading stage to allow the light modulated by the two first optical waveguides on the forward path side at the leading stage according to the first electric signal to pass therethrough;
two first optical waveguides on a backward path side at the leading stage as the first optical waveguide connected to the second optical waveguide at the leading stage;
a second electrode that applies a second electric signal to the two first optical waveguides on the backward path side at the leading stage;
a first multiplexing unit connected to the two first optical waveguides on the backward path side at the leading stage to multiplex the light passing therethrough after being modulated by the two first optical waveguides on the backward path side at the leading stage according to the second electric signal;
a second optical waveguide at a middle stage as the second optical waveguide connected to the first multiplexing unit to allow the light from the first multiplexing unit to pass therethrough;
two first optical waveguides on the forward path side at a trailing stage as the first optical waveguide connected to the second optical waveguide at the middle stage;
a third electrode that applies a third electric signal to the two first optical waveguides on the forward path side at the trailing stage;
a second multiplexing unit connected to the two first optical waveguides on the forward path side at the trailing stage to multiplex the light passing therethrough after being modulated by the two first optical waveguides on the forward path side at the trailing stage according to the third electric signal;
a second optical waveguide at the trailing stage as the second optical waveguide connected to the second multiplexing unit to allow the light from the second multiplexing unit to pass therethrough;
a first optical waveguide on the backward path side at the trailing stage as the first optical waveguide connected to the second optical waveguide at the trailing stage; and
an output unit connected to the first optical waveguide on the backward path side at the trailing stage to output the light from the first optical waveguide on the backward path side at the trailing stage, wherein
at least portions of cores of the second optical waveguide at the leading stage, the second optical waveguide at the middle stage, and the second optical waveguide at the trailing stage are
in the amorphous state, and
cores of the two first optical waveguides on the forward path side at the leading stage, the two first optical waveguides on the backward path side at the leading stage, and the two first optical waveguides on the forward path side at the trailing stage are
in a non-amorphous state.