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

Claim 9:
10. The optical device according to claim 1, further including:
an input unit that receives light;
a branching unit that branches the light from the input unit;
two first optical waveguides on a forward path side as the first optical waveguide branched at the branching unit;
a first electrode that applies a first electric signal to the two first optical waveguides on the forward path side;
the second optical waveguide connected to the two first optical waveguides on the forward path side to allow the light modulated by the two first optical waveguides on the forward path side according to the first electric signal to pass therethrough;
two first optical waveguides on a backward path side as the first optical waveguide connected to the second optical waveguide;
a second electrode that applies a second electric signal to the two first optical waveguides on the backward path side;
a multiplexing unit connected to the two first optical waveguides on the backward path side to multiplex the light passing therethrough after being modulated by the two first optical waveguides on the backward path side according to the second electric signal; and
an output unit that outputs the modulated light multiplexed by the multiplexing unit, wherein
at least a portion of a core of the second optical waveguide is
in the amorphous state, and
a core of the two first optical waveguides on the forward path side and the two first optical waveguides on the backward path side are
in a non-amorphous state.