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Kotaro SUGITA Yasuyuki SUGIYAMA Isamu KATO Koki SATO
Optical waveguide polarizers are realized by three dimensional polymer thin film waveguides with a-Si: H film clad. It has a low index buffer layer between the waveguide and a-Si: H film clad. It is experimentally found that a high extinction ratio for either TE or TM mode pass polarizer can be obtained by changing the hickness of the a-Si: H film clad.