Young & Thompson
Optical waveguide device and a manufacturing method for an optical waveguide device
To reduce the wavelength dependence of the phase difference given to the lightwaves traveling through the optical waveguide arms of a coherent mixer, the optical waveguide device includes a first optical branching device branching a first input light and outputting to a first and a second optical waveguides, a second optical branching device branching a second input light and outputting to a third and a fourth optical waveguides, a first optical coupler that mixes lightwaves travelling through the first and the third optical waveguides, and then branches and outputs a first and a second output lights, a second optical coupler that mixes the lightwaves which travel through the second and the fourth optical waveguides, and then branches and outputs a third and a fourth output lights. Here optical path lengths are mutually equal between the first and the second optical waveguides, and between the third and the fourth optical waveguides.
NEC CORPORATION
G G G G G G G G Y G
G02B G02B G02B G02B G02B G02B G02B G02B Y10T G02B
additional inventional inventional additional inventional inventional inventional additional additional additional
Shinya
Watanabe