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

Takuya Kudo, Takaaki Ishigure

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Volume8989
ISBN (Print)9780819499028
DOIs
Publication statusPublished - 2014
EventSmart Photonic and Optoelectronic Integrated Circuits XVI - San Francisco, CA, United States
Duration: 2014 Feb 52014 Feb 6

Other

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

Fingerprint

Optical Waveguides
Crosstalk
Optical waveguides
crosstalk
optical waveguides
Polymers
Waveguides
polymers
Waveguide
waveguides
Beam propagation method
Beam Propagation
Mode Coupling
Refractive index
Refractive Index
Propagation
propagation
Decrease

Keywords

  • Beam propagation method
  • Mode coupling
  • Nonidentical cores
  • On-board Optical Interconnect
  • Optical waveguide

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Kudo, T., & Ishigure, T. (2014). Inter-channel crosstalk in densely aligned multimode polymer parallel optical waveguides. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8989). [89890W] SPIE. https://doi.org/10.1117/12.2038878

Inter-channel crosstalk in densely aligned multimode polymer parallel optical waveguides. / Kudo, Takuya; Ishigure, Takaaki.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8989 SPIE, 2014. 89890W.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kudo, T & Ishigure, T 2014, Inter-channel crosstalk in densely aligned multimode polymer parallel optical waveguides. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8989, 89890W, SPIE, Smart Photonic and Optoelectronic Integrated Circuits XVI, San Francisco, CA, United States, 14/2/5. https://doi.org/10.1117/12.2038878
Kudo T, Ishigure T. Inter-channel crosstalk in densely aligned multimode polymer parallel optical waveguides. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8989. SPIE. 2014. 89890W https://doi.org/10.1117/12.2038878
Kudo, Takuya ; Ishigure, Takaaki. / Inter-channel crosstalk in densely aligned multimode polymer parallel optical waveguides. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8989 SPIE, 2014.
@inproceedings{bd1a478dac4e4226ab3c17943d14a201,
title = "Inter-channel crosstalk in densely aligned multimode polymer parallel optical waveguides",
abstract = "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.",
keywords = "Beam propagation method, Mode coupling, Nonidentical cores, On-board Optical Interconnect, Optical waveguide",
author = "Takuya Kudo and Takaaki Ishigure",
year = "2014",
doi = "10.1117/12.2038878",
language = "English",
isbn = "9780819499028",
volume = "8989",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",

}

TY - GEN

T1 - Inter-channel crosstalk in densely aligned multimode polymer parallel optical waveguides

AU - Kudo, Takuya

AU - Ishigure, Takaaki

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

KW - Beam propagation method

KW - Mode coupling

KW - Nonidentical cores

KW - On-board Optical Interconnect

KW - Optical waveguide

UR - http://www.scopus.com/inward/record.url?scp=84901701615&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84901701615&partnerID=8YFLogxK

U2 - 10.1117/12.2038878

DO - 10.1117/12.2038878

M3 - Conference contribution

AN - SCOPUS:84901701615

SN - 9780819499028

VL - 8989

BT - Proceedings of SPIE - The International Society for Optical Engineering

PB - SPIE

ER -