| 摘要 |
According to the present invention, the effective refractive index of a TM0 polarized wave guided through a first core (11a) when existing alone and the execution refractive index of a TE0 polarized wave guided through a second core (11b) when existing alone are continuous as a function of distance from a starting point of a parallel traveling section (I), a magnitude relation between the effective refractive index of the odd mode of the TE0 polarized wave guided through the parallel traveling section (I) and the effective refractive index of the even mode of the TM0 polarized wave guided through the parallel traveling section (I) is reversed at the starting point and the ending point of the parallel traveling section (I), and the refractive index distribution in an interactive section (i) is vertically asymmetric. |
