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http://dx.doi.org/10.7236/JIIBC.2014.14.3.171

Ultracompact Polarization-Insensitive Directional Coupler based on Double Sandwiched Rib-Type Waveguide  

Ho, Kwang-Chun (Dept. of ICs Engineering, Hansung University)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.14, no.3, 2014 , pp. 171-176 More about this Journal
Abstract
The polarization characteristics of ultracompact polarization-insensitive directional coupler (PIDC) based on double sandwiched rib-type waveguide are explored in detail by using longitudinal modal transmission-line theory (L-MTLT). To obtain the polarization-insensitive condition of ultracompact directional coupler, the coupling length and coupling efficiency as functions of the refractive index and thickness of sandwiched rib-type waveguide are analyzed for quasi-TE and quasi-TM modes. The numerical results show that the ultracompact polarization-insensitive coupler with hundreds of micrometer scales is realized by properly choosing structural and material parameters of double sandwiched layers. Furthermore, the influence of fundamental mode profile, which is distributed in lateral waveguide of coupler, on the coupler performance has been investigated.
Keywords
Polarization-Insensitive Coupler; Equivalent Network; Double Sandwiched Waveguide;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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