[9a-PB2-1~9] 3.15 Silicon photonics

[9a-PB2-1] Asymmetric directional coupler type polarization rotator Bragg grating

〇Hideaki Okayama^1,2, Yosuke Onawa^1,2, Daisuke Shimura^1,2, Hiroki Yaegashi^1,2, Hironori Sasaki^1,2 (1.OKI, 2.PETRA)

Keywords:silicon photonics, grating, polarization

In this presentation we report polarization rotation Bragg diffraction incorporated in asymmetric waveguide deirectional coupler to achieve wavelength add/drop. Two waveguides with different widths (or thicknesses) are placed near to each other and antisymmetric sidewall grating is incorporated in one of them. To generate polarization rotation, asymmetric waveguide strucutre in depth direction is required and rib structure around the grating is used for this.