Inter-channel crosstalk in densely aligned multimode polymer parallel optical waveguides

Takuya Kudo, Takaaki Ishigure

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

We theoretically estimate the inter-channel crosstalk in densely aligned multimode polymer parallel optical waveguides using a beam propagation method, and compare the results of graded-index (GI)-core waveguides with those of conventional step-index (SI)-core counterpart. In particular, we simulate the crosstalk in bridged core waveguides. Here, the bridged core is sometimes observed in the waveguides fabricated using the imprinting method. The inter-channel crosstalk in SI-core waveguide increases from-25 dB to-4 dB with increasing the bridge thickness. Contrastingly, the worst crosstalk in a GI-core is as low as-15 dB despite the bridged structure as long as the bridge of the core is not included in the index distribution of the GI-core core, namely SI bridged core. In addition, the crosstalk in the GI-core decreases when the multiple cores aligned in parallel have a different structure (core size, refractive index, etc.), because the difference in the core structure makes changes in the distribution of propagation constants, resulting in decreasing the mode coupling efficiency between the two cores. Hence, the worst crosstalk in the GI-core waveguide with a slightly different core structure is as low as-19 dB despite the bridged structure. Thus, the imprinting method should be utilized for GI-core waveguides: the inter-channel crosstalk is un-problematic even if a residual layer remains.

本文言語English
ホスト出版物のタイトルSmart Photonic and Optoelectronic Integrated Circuits XVI
出版社SPIE
ISBN(印刷版)9780819499028
DOI
出版ステータスPublished - 2014 1月 1
イベントSmart Photonic and Optoelectronic Integrated Circuits XVI - San Francisco, CA, United States
継続期間: 2014 2月 52014 2月 6

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
8989
ISSN(印刷版)0277-786X
ISSN(電子版)1996-756X

Other

OtherSmart Photonic and Optoelectronic Integrated Circuits XVI
国/地域United States
CitySan Francisco, CA
Period14/2/514/2/6

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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