Design of tight bends in silicon-on-insulator ridge waveguides

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Abstract

In this work numerical analysis was used to explore ways for reducing bending losses in silicon-on-insulator ridge waveguides. Bending losses in single-mode ridge waveguides with different sizes were calculated. The results obtained were used in a numerical optimization of an S-bend structure. Also, the loss reduction achieved by placing a groove along the side of a bend was determined. Calculations were made for both TE and TM polarizations at 1550nm wavelength. Smaller waveguides were found to cause much smaller bending losses. The groove structure allows the use of ten times smaller bending radii. With the groove, a ridge waveguide with 1.5µm thickness and 75µm bending radius was found to have only 0.7dB loss in a 90° turn, when both bending and junction losses were taken into account. The numerical path optimization of an S-bend halved the total loss in dB.
Original languageEnglish
Pages (from-to)209-212
JournalPhysica Scripta: Topical Issues
VolumeT114
DOIs
Publication statusPublished - 2004
MoE publication typeA1 Journal article-refereed

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Silicon-on-insulator
Ridge
Waveguide
ridges
insulators
waveguides
silicon
grooves
Radius
optimization
radii
Numerical Optimization
Single Mode
Design
numerical analysis
Numerical Analysis
Polarization
Wavelength
Path
Optimization

Cite this

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title = "Design of tight bends in silicon-on-insulator ridge waveguides",
abstract = "In this work numerical analysis was used to explore ways for reducing bending losses in silicon-on-insulator ridge waveguides. Bending losses in single-mode ridge waveguides with different sizes were calculated. The results obtained were used in a numerical optimization of an S-bend structure. Also, the loss reduction achieved by placing a groove along the side of a bend was determined. Calculations were made for both TE and TM polarizations at 1550nm wavelength. Smaller waveguides were found to cause much smaller bending losses. The groove structure allows the use of ten times smaller bending radii. With the groove, a ridge waveguide with 1.5µm thickness and 75µm bending radius was found to have only 0.7dB loss in a 90° turn, when both bending and junction losses were taken into account. The numerical path optimization of an S-bend halved the total loss in dB.",
author = "Mikko Harjanne and Timo Aalto",
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pages = "209--212",
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Design of tight bends in silicon-on-insulator ridge waveguides. / Harjanne, Mikko; Aalto, Timo.

In: Physica Scripta: Topical Issues, Vol. T114, 2004, p. 209-212.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Design of tight bends in silicon-on-insulator ridge waveguides

AU - Harjanne, Mikko

AU - Aalto, Timo

N1 - Project code: T3SU00354

PY - 2004

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N2 - In this work numerical analysis was used to explore ways for reducing bending losses in silicon-on-insulator ridge waveguides. Bending losses in single-mode ridge waveguides with different sizes were calculated. The results obtained were used in a numerical optimization of an S-bend structure. Also, the loss reduction achieved by placing a groove along the side of a bend was determined. Calculations were made for both TE and TM polarizations at 1550nm wavelength. Smaller waveguides were found to cause much smaller bending losses. The groove structure allows the use of ten times smaller bending radii. With the groove, a ridge waveguide with 1.5µm thickness and 75µm bending radius was found to have only 0.7dB loss in a 90° turn, when both bending and junction losses were taken into account. The numerical path optimization of an S-bend halved the total loss in dB.

AB - In this work numerical analysis was used to explore ways for reducing bending losses in silicon-on-insulator ridge waveguides. Bending losses in single-mode ridge waveguides with different sizes were calculated. The results obtained were used in a numerical optimization of an S-bend structure. Also, the loss reduction achieved by placing a groove along the side of a bend was determined. Calculations were made for both TE and TM polarizations at 1550nm wavelength. Smaller waveguides were found to cause much smaller bending losses. The groove structure allows the use of ten times smaller bending radii. With the groove, a ridge waveguide with 1.5µm thickness and 75µm bending radius was found to have only 0.7dB loss in a 90° turn, when both bending and junction losses were taken into account. The numerical path optimization of an S-bend halved the total loss in dB.

U2 - 10.1088/0031-8949/2004/T114/053

DO - 10.1088/0031-8949/2004/T114/053

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JO - Physica Scripta

JF - Physica Scripta

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