Characteristics study of multimode directional coupler by elliptical point contacts and CMT

L. S. Supian, Harry Ramza, Mohd Syuhaimi Ab Rahman, Norhana Arsad

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

Abstract

The developed directional coupler using polymer optical fiber performance is studied analytically where related theories are integrated and the outcomes are analyzed. Important theories such as simplified coupled mode theory and elliptical point contacts are integrated where the parameters such as coupling length, distance between the two fibers cores and forces are varied. Using simplified coupled mode theory, coupling coefficient and coupling efficiency is obtained based on the parameters of multimode fiber coupler such as the operating wavelength, numerical apertures, coupling length and diameter of the cores. The two fibers are initially tapered at certain length at most 20 mm and attached to geometrical blocks with certain radii and the middle tapered regions of the fibers are brought closed in proximity and they are lapped to each other. Investigation of different radii of the geometrical blocks represents the effect of macro-bending when the fibers are bent when attached to the circular blocks. This concept is used to transfer the modes from first fiber to the second. Then a particular amount of load force is exerted upon one side of the blocks so that the gap is closed and leads to increment of coupling length between the two fibers. The various load force amount will give different coupling lengths and distances between the two cores, thus leading to different coupling efficiencies. Analytically the expression that represents the coupling efficiency with force is an integrated expression from simplified coupled mode theory and Hertz's Law of elliptical point contacts. Optimized coupling efficiency obtained is as high as 70% for this study.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Volume9286
ISBN (Print)9781628413618
DOIs
Publication statusPublished - 2014
Event2nd International Conference on Applications of Optics and Photonics - Aveiro
Duration: 26 May 201430 May 2014

Other

Other2nd International Conference on Applications of Optics and Photonics
CityAveiro
Period26/5/1430/5/14

Fingerprint

Directional couplers
directional couplers
Coupler
Point contacts
Contact
Fibers
fibers
Fiber
Coupled-mode Theory
coupled modes
Plastic optical fibers
Multimode fibers
Radius
Polymer Optical Fiber
radii
Macros
Closed
Multimode Fiber
numerical aperture
coupling coefficients

Keywords

  • Circular blocks
  • Coupled mode theory
  • Coupling efficiency
  • Elliptical blocks
  • Elliptical point contacts
  • Force
  • Macrobending
  • Multimode directional coupler

ASJC Scopus subject areas

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

Cite this

Supian, L. S., Ramza, H., Ab Rahman, M. S., & Arsad, N. (2014). Characteristics study of multimode directional coupler by elliptical point contacts and CMT. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 9286). [92863K] SPIE. https://doi.org/10.1117/12.2063541

Characteristics study of multimode directional coupler by elliptical point contacts and CMT. / Supian, L. S.; Ramza, Harry; Ab Rahman, Mohd Syuhaimi; Arsad, Norhana.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9286 SPIE, 2014. 92863K.

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

Supian, LS, Ramza, H, Ab Rahman, MS & Arsad, N 2014, Characteristics study of multimode directional coupler by elliptical point contacts and CMT. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 9286, 92863K, SPIE, 2nd International Conference on Applications of Optics and Photonics, Aveiro, 26/5/14. https://doi.org/10.1117/12.2063541
Supian LS, Ramza H, Ab Rahman MS, Arsad N. Characteristics study of multimode directional coupler by elliptical point contacts and CMT. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9286. SPIE. 2014. 92863K https://doi.org/10.1117/12.2063541
Supian, L. S. ; Ramza, Harry ; Ab Rahman, Mohd Syuhaimi ; Arsad, Norhana. / Characteristics study of multimode directional coupler by elliptical point contacts and CMT. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9286 SPIE, 2014.
@inproceedings{e80863a368204859b1f01f77c1fdc1c2,
title = "Characteristics study of multimode directional coupler by elliptical point contacts and CMT",
abstract = "The developed directional coupler using polymer optical fiber performance is studied analytically where related theories are integrated and the outcomes are analyzed. Important theories such as simplified coupled mode theory and elliptical point contacts are integrated where the parameters such as coupling length, distance between the two fibers cores and forces are varied. Using simplified coupled mode theory, coupling coefficient and coupling efficiency is obtained based on the parameters of multimode fiber coupler such as the operating wavelength, numerical apertures, coupling length and diameter of the cores. The two fibers are initially tapered at certain length at most 20 mm and attached to geometrical blocks with certain radii and the middle tapered regions of the fibers are brought closed in proximity and they are lapped to each other. Investigation of different radii of the geometrical blocks represents the effect of macro-bending when the fibers are bent when attached to the circular blocks. This concept is used to transfer the modes from first fiber to the second. Then a particular amount of load force is exerted upon one side of the blocks so that the gap is closed and leads to increment of coupling length between the two fibers. The various load force amount will give different coupling lengths and distances between the two cores, thus leading to different coupling efficiencies. Analytically the expression that represents the coupling efficiency with force is an integrated expression from simplified coupled mode theory and Hertz's Law of elliptical point contacts. Optimized coupling efficiency obtained is as high as 70{\%} for this study.",
keywords = "Circular blocks, Coupled mode theory, Coupling efficiency, Elliptical blocks, Elliptical point contacts, Force, Macrobending, Multimode directional coupler",
author = "Supian, {L. S.} and Harry Ramza and {Ab Rahman}, {Mohd Syuhaimi} and Norhana Arsad",
year = "2014",
doi = "10.1117/12.2063541",
language = "English",
isbn = "9781628413618",
volume = "9286",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",

}

TY - GEN

T1 - Characteristics study of multimode directional coupler by elliptical point contacts and CMT

AU - Supian, L. S.

AU - Ramza, Harry

AU - Ab Rahman, Mohd Syuhaimi

AU - Arsad, Norhana

PY - 2014

Y1 - 2014

N2 - The developed directional coupler using polymer optical fiber performance is studied analytically where related theories are integrated and the outcomes are analyzed. Important theories such as simplified coupled mode theory and elliptical point contacts are integrated where the parameters such as coupling length, distance between the two fibers cores and forces are varied. Using simplified coupled mode theory, coupling coefficient and coupling efficiency is obtained based on the parameters of multimode fiber coupler such as the operating wavelength, numerical apertures, coupling length and diameter of the cores. The two fibers are initially tapered at certain length at most 20 mm and attached to geometrical blocks with certain radii and the middle tapered regions of the fibers are brought closed in proximity and they are lapped to each other. Investigation of different radii of the geometrical blocks represents the effect of macro-bending when the fibers are bent when attached to the circular blocks. This concept is used to transfer the modes from first fiber to the second. Then a particular amount of load force is exerted upon one side of the blocks so that the gap is closed and leads to increment of coupling length between the two fibers. The various load force amount will give different coupling lengths and distances between the two cores, thus leading to different coupling efficiencies. Analytically the expression that represents the coupling efficiency with force is an integrated expression from simplified coupled mode theory and Hertz's Law of elliptical point contacts. Optimized coupling efficiency obtained is as high as 70% for this study.

AB - The developed directional coupler using polymer optical fiber performance is studied analytically where related theories are integrated and the outcomes are analyzed. Important theories such as simplified coupled mode theory and elliptical point contacts are integrated where the parameters such as coupling length, distance between the two fibers cores and forces are varied. Using simplified coupled mode theory, coupling coefficient and coupling efficiency is obtained based on the parameters of multimode fiber coupler such as the operating wavelength, numerical apertures, coupling length and diameter of the cores. The two fibers are initially tapered at certain length at most 20 mm and attached to geometrical blocks with certain radii and the middle tapered regions of the fibers are brought closed in proximity and they are lapped to each other. Investigation of different radii of the geometrical blocks represents the effect of macro-bending when the fibers are bent when attached to the circular blocks. This concept is used to transfer the modes from first fiber to the second. Then a particular amount of load force is exerted upon one side of the blocks so that the gap is closed and leads to increment of coupling length between the two fibers. The various load force amount will give different coupling lengths and distances between the two cores, thus leading to different coupling efficiencies. Analytically the expression that represents the coupling efficiency with force is an integrated expression from simplified coupled mode theory and Hertz's Law of elliptical point contacts. Optimized coupling efficiency obtained is as high as 70% for this study.

KW - Circular blocks

KW - Coupled mode theory

KW - Coupling efficiency

KW - Elliptical blocks

KW - Elliptical point contacts

KW - Force

KW - Macrobending

KW - Multimode directional coupler

UR - http://www.scopus.com/inward/record.url?scp=84922738935&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84922738935&partnerID=8YFLogxK

U2 - 10.1117/12.2063541

DO - 10.1117/12.2063541

M3 - Conference contribution

AN - SCOPUS:84922738935

SN - 9781628413618

VL - 9286

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

PB - SPIE

ER -