Spot size converter, optical transmitter, optical receiver, optical transceiver, and method of manufacturing spot size converter

摘要

The spot size converter includes a first cladding layer, a first core layer and a second core layer arranged side by side on the first cladding layer so as to extend from a first end which receives/outputs light along a direction from the first end toward a second end, a third core layer which is disposed on the first cladding layer between the first and second core layers, is a member different from the first and second core layers, and extends to the second end along the direction from the first end toward the second end, and a second cladding layer disposed on the first, second, and third core layers.

主权项

1. A spot size converter, comprising:
a first cladding layer; a first core layer and a second core layer arranged side by side on the first cladding layer so as to extend from a first end which receives/outputs light along a direction from the first end toward a second end; a third core layer which is disposed on the first cladding layer between the first and second core layers, is a member different from the first and second core layers, and extends to the second end along the direction from the first end toward the second end; and a second cladding layer disposed on the first, second, and third core layers, wherein: a sectional area of the first and second core layers increases in the direction from the first end toward the second end, sectional area of the third core layer increases in a direction from the first end toward the second end, and the sectional area of the first and second core layers decreases in the direction from the first end toward the second end from the position where the sectional area of the first and second core layers is the maximum, and sectional area of the third core layer is the maximum in a position where sectional area of the first and second core layers is the minimum in the direction from the first end toward the second end.