| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical semiconductor element having a reduced size. <P>SOLUTION: An optical semiconductor element 10 comprises: a semiconductor laser 11 formed on a substrate 30; a first phase modulator 12 that is formed on the substrate 30 and has a first optical waveguide 12a; a second phase modulator 13 that is formed on the substrate 30 and has a second optical waveguide 13a; a first optical coupler 14 that is formed on the substrate 30, splits the output light from the semiconductor laser 11 into two light beams, and then outputs the split light beams to the first optical waveguide 12a and the second optical waveguide 13a; and a second optical coupler 15 that is formed on the substrate 30, couples the output light beams from the first optical waveguide 12a and the second optical waveguide 13a, and then outputs the coupled light beams. The semiconductor laser 11, the first optical waveguide 12a, and the second optical waveguide 13a are disposed in parallel so as to overlap at least their portions. <P>COPYRIGHT: (C)2012,JPO&INPIT |
