Design of thick polarization beam splitter based on a bridged directional coupler with 400 nm high silicon cores
| Autor: | Yoohan Kim, Kyong Hon Kim, Seunghyun Oh, Yudeuk Kim |
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| Rok vydání: | 2020 |
| Předmět: |
Waveguide (electromagnetism)
Materials science Silicon business.industry Single-mode optical fiber chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Transverse mode 010309 optics Core (optical fiber) Wavelength Planar chemistry 0103 physical sciences Optoelectronics Power dividers and directional couplers 0210 nano-technology business |
| Zdroj: | 14th Pacific Rim Conference on Lasers and Electro-Optics (CLEO PR 2020). |
| Popis: | We introduce a thick integrated polarization beam splitter (PBS) based on a bridged directional coupler (DC) with three planar waveguides of 400-nm-high silicon core layer. Contrary to the conventional thin DC-type PBSs using the cross coupling effect of the TM modes, the thick PBS utilizes the cross coupling effect of TE modes because the effective refractive index of the fundamental TM mode is larger than that of the fundamental TE mode in the single mode condition. At the 1,550 nm wavelength, the peak polarization-extinction-ratios (PERs) of the PBS device are calculated to be 33.81 dB and 41.09 dB for TM and TE modes, respectively, and its corresponding insertion losses (ILs) are 1.58 dB and 0.08 dB when its main input and output waveguide width, a bridge waveguide width, waveguide gap and coupling length are 190 nm, 270 nm, 560 nm, and 32.6 μm, respectively. |
| Databáze: | OpenAIRE |
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