Narrowband wavelength demultiplexer using weighted coupling vertical couplers

Research output: Contribution to journalConference article

Abstract

A four channel narrowband wavelength demultiplexer utilizing vertical directional coupler structures is investigated. Four ridge waveguides with different ridge widths were vertically coupled to weakly guided strip-loaded (SL) waveguide which resulted in four different wavelengths filtered out in each ridge waveguide. In order to reduce the side lobes, the coupling coefficients were weighted by varying the offset of ridge waveguides from the center of strip into propagation direction. An average channel spacing of 7 nm with power coupling efficiency of approximately 70% was achieved by varying the width of ridge by 0.2 μm. 3-dB bandwidth of each channel were less than 2.1 nm while the side-lobe suppression ratios remained approximately 20 dB.

Original languageEnglish
Pages (from-to)326-327
Number of pages2
JournalConference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
Volume1
Publication statusPublished - 1997 Dec 1
EventProceedings of the 1997 10th IEEE Lasers and Electro-Optics Society Annual Meeting, LEOS. Part 2 (of 2) - San Francisco, CA, USA
Duration: 1997 Nov 101997 Nov 13

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Ridge waveguides
Wavelength
Directional couplers
Waveguides
Bandwidth

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

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abstract = "A four channel narrowband wavelength demultiplexer utilizing vertical directional coupler structures is investigated. Four ridge waveguides with different ridge widths were vertically coupled to weakly guided strip-loaded (SL) waveguide which resulted in four different wavelengths filtered out in each ridge waveguide. In order to reduce the side lobes, the coupling coefficients were weighted by varying the offset of ridge waveguides from the center of strip into propagation direction. An average channel spacing of 7 nm with power coupling efficiency of approximately 70{\%} was achieved by varying the width of ridge by 0.2 μm. 3-dB bandwidth of each channel were less than 2.1 nm while the side-lobe suppression ratios remained approximately 20 dB.",
author = "Han, {Sang Kook}",
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journal = "Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS",
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N2 - A four channel narrowband wavelength demultiplexer utilizing vertical directional coupler structures is investigated. Four ridge waveguides with different ridge widths were vertically coupled to weakly guided strip-loaded (SL) waveguide which resulted in four different wavelengths filtered out in each ridge waveguide. In order to reduce the side lobes, the coupling coefficients were weighted by varying the offset of ridge waveguides from the center of strip into propagation direction. An average channel spacing of 7 nm with power coupling efficiency of approximately 70% was achieved by varying the width of ridge by 0.2 μm. 3-dB bandwidth of each channel were less than 2.1 nm while the side-lobe suppression ratios remained approximately 20 dB.

AB - A four channel narrowband wavelength demultiplexer utilizing vertical directional coupler structures is investigated. Four ridge waveguides with different ridge widths were vertically coupled to weakly guided strip-loaded (SL) waveguide which resulted in four different wavelengths filtered out in each ridge waveguide. In order to reduce the side lobes, the coupling coefficients were weighted by varying the offset of ridge waveguides from the center of strip into propagation direction. An average channel spacing of 7 nm with power coupling efficiency of approximately 70% was achieved by varying the width of ridge by 0.2 μm. 3-dB bandwidth of each channel were less than 2.1 nm while the side-lobe suppression ratios remained approximately 20 dB.

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