| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor integrated element which can suppress connection loss of guided wave light without using a tapered region. SOLUTION: The semiconductor integrated element 1 includes a first clad layer C1, a second clad layer C2 having a first ridge part 15 and a second ridge part 25, a core region having a first core layer 10 and a second core layer 20 and formed between the first clad layer C1 and the second clad layer C2, and an embedded layer 6. A width of the first ridge part 15 is different from a width of the second ridge part 25. The first core layer 10 is connected to the second core layer 20 by a butt joint method. A first semiconductor optical element S1 includes the first clad layer C1, the first core layer 10, the second clad layer C2, a first adjusting layer A1, and the embedded layer 6. The first adjusting layer A1 is formed between the embedded layer 6 and the first ridge part 15, and extends in a predetermined axial direction while it is in contact with the first ridge part 15. A refractive index of the first adjusting layer A1 is lower than a refractive index of the first core layer 10 and is higher than a refractive index of the embedded layer 6. COPYRIGHT: (C)2011,JPO&INPIT
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