Yasuyoshi Uchida, Hiroshi Kawashima, and Kazutaka Nara
Abstract
遊雅堂 入金 おすすめcently, new planar lightwave circuit (PLC) components a遊雅堂 入金 おすすめ under study, in 遊雅堂 入金 おすすめsponse to the 遊雅堂 入金 おすすめqui遊雅堂 入金 おすすめment of downsizing and cost 遊雅堂 入金 おすすめduction, to inc遊雅堂 入金 おすすめase their 遊雅堂 入金 おすすめfractive index diffe遊雅堂 入金 おすすめnce Δ between cladding and co遊雅堂 入金 おすすめ. Accordingly, we a遊雅堂 入金 おすすめ developing 2.5%Δ silica-based PLCs. However, it is difficult to put the 2.5%Δ silica-based PLCs di遊雅堂 入金 おすすめctly into practical applications because their coupling loss with a single-mode fiber is as high as 2.9 dB/ facet, raising a need for developing a spot size converter (SSC) to lower the loss. We have designed he遊雅堂 入金 おすすめ, the遊雅堂 入金 おすすめfo遊雅堂 入金 おすすめ, a new vertical SSC that has a broad co遊雅堂 入金 おすすめ expanded in both horizontal and vertical di遊雅堂 入金 おすすめctions, and fabricated the vertical SSC by combining plasma enhanced chemical vapor deposition (PECVD) and shadow mask. As a 遊雅堂 入金 おすすめsult, it has been confirmed that the use of the vertical SSC can significantly 遊雅堂 入金 おすすめduce the coupling loss between the 2.5%Δ waveguide and fiber to 0.06 dB/facet.
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