New design of 1x3 wavelength demultiplexer based on tilted grating in glass waveguide for first window operating wavelength

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Abstract

In this paper, an overview of modeling work employed tilted Bragg grating filter in glass waveguide for a novel demultiplexer design is presented. The design is focused to operate in the first window wavelength band but extension to other windows is possible by modifying the grating period. Investigations are carried out to show the dependences of power reflection on the Bragg structural parameter (tilt angle). By utilizing IFO_Grating software applying coupled-mode theory, the results indicated that the propagating power is reflected significantly if the tilt angle is less than 10° and shows no reflectance above this angle. Further numerical simulation with BPM technique using BPM_CAD, demonstrated that a substantial amount of power can be deflected from the main waveguide by blazed Bragg grating structure. More than six wavelengths using channel spacing above 100 nm can be separated when utilizing the model with over 88% of reflected output power. With the limitation of the BPM method, the tilt angle of more than 45° is considered. From this study, an intuitive understanding of the spectral behaviors of the tilted fiber grating and an aid to designing and optimizing the devices for demultiplexer application is obtained.

Original languageEnglish
Pages (from-to)2607-2613
Number of pages7
JournalAustralian Journal of Basic and Applied Sciences
Volume3
Issue number3
Publication statusPublished - Jul 2009

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gratings
waveguides
glass
wavelengths
Bragg gratings
computer aided design
coupled modes
spacing
computer programs
reflectance
filters
fibers
output
simulation

Keywords

  • BPM
  • CMT
  • Demultiplexer
  • Power deflection
  • Tilted bragg grating

ASJC Scopus subject areas

  • General

Cite this

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title = "New design of 1x3 wavelength demultiplexer based on tilted grating in glass waveguide for first window operating wavelength",
abstract = "In this paper, an overview of modeling work employed tilted Bragg grating filter in glass waveguide for a novel demultiplexer design is presented. The design is focused to operate in the first window wavelength band but extension to other windows is possible by modifying the grating period. Investigations are carried out to show the dependences of power reflection on the Bragg structural parameter (tilt angle). By utilizing IFO_Grating software applying coupled-mode theory, the results indicated that the propagating power is reflected significantly if the tilt angle is less than 10° and shows no reflectance above this angle. Further numerical simulation with BPM technique using BPM_CAD, demonstrated that a substantial amount of power can be deflected from the main waveguide by blazed Bragg grating structure. More than six wavelengths using channel spacing above 100 nm can be separated when utilizing the model with over 88{\%} of reflected output power. With the limitation of the BPM method, the tilt angle of more than 45° is considered. From this study, an intuitive understanding of the spectral behaviors of the tilted fiber grating and an aid to designing and optimizing the devices for demultiplexer application is obtained.",
keywords = "BPM, CMT, Demultiplexer, Power deflection, Tilted bragg grating",
author = "{Ab Rahman}, {Mohd Syuhaimi} and {Abdul Wahab}, {Hamimi Fadziati}",
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AU - Ab Rahman, Mohd Syuhaimi

AU - Abdul Wahab, Hamimi Fadziati

PY - 2009/7

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N2 - In this paper, an overview of modeling work employed tilted Bragg grating filter in glass waveguide for a novel demultiplexer design is presented. The design is focused to operate in the first window wavelength band but extension to other windows is possible by modifying the grating period. Investigations are carried out to show the dependences of power reflection on the Bragg structural parameter (tilt angle). By utilizing IFO_Grating software applying coupled-mode theory, the results indicated that the propagating power is reflected significantly if the tilt angle is less than 10° and shows no reflectance above this angle. Further numerical simulation with BPM technique using BPM_CAD, demonstrated that a substantial amount of power can be deflected from the main waveguide by blazed Bragg grating structure. More than six wavelengths using channel spacing above 100 nm can be separated when utilizing the model with over 88% of reflected output power. With the limitation of the BPM method, the tilt angle of more than 45° is considered. From this study, an intuitive understanding of the spectral behaviors of the tilted fiber grating and an aid to designing and optimizing the devices for demultiplexer application is obtained.

AB - In this paper, an overview of modeling work employed tilted Bragg grating filter in glass waveguide for a novel demultiplexer design is presented. The design is focused to operate in the first window wavelength band but extension to other windows is possible by modifying the grating period. Investigations are carried out to show the dependences of power reflection on the Bragg structural parameter (tilt angle). By utilizing IFO_Grating software applying coupled-mode theory, the results indicated that the propagating power is reflected significantly if the tilt angle is less than 10° and shows no reflectance above this angle. Further numerical simulation with BPM technique using BPM_CAD, demonstrated that a substantial amount of power can be deflected from the main waveguide by blazed Bragg grating structure. More than six wavelengths using channel spacing above 100 nm can be separated when utilizing the model with over 88% of reflected output power. With the limitation of the BPM method, the tilt angle of more than 45° is considered. From this study, an intuitive understanding of the spectral behaviors of the tilted fiber grating and an aid to designing and optimizing the devices for demultiplexer application is obtained.

KW - BPM

KW - CMT

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KW - Power deflection

KW - Tilted bragg grating

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