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Journal : JURNAL SAINS DAN TEKNOLOGI INDONESIA

KARAKTERISTIK DIREKSIONAL KOPLER MENGGUNAKAN TEORI MODA TERGANDENG DAN METHOD OF LINES Syahriar, ary; Adam, Helmi
Jurnal Sains dan Teknologi Indonesia Vol. 8 No. 3 (2006)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (29.685 KB) | DOI: 10.29122/jsti.v8i3.760

Abstract

Single mode directional couplers are key components in many optical communication and sensor applications, including optical power splitting, optical filtering, optical reflecting, wavelength multiplexing/demultiplexing, and optical polarisation splitting. The general basic principle in most directional coupler is that under appropriate conditions light transfer can occur between the two adjacent fiber cores via a mechanism called evanescent wave coupling. When the two cores are put closely together the evanescent field travelling from the throughput fiber reaches the coupled waveguide and excite a mode in it. In this paper we use two approaches in analyzing the properties of directional couplers, namely the coupled mode thery and the method of lines. it is found that the two methods agree very well.
PERAN TEKNOLOGI INFORMASI DALAM PENGENTASAN KEMISKINAN DI INDONESIA Syahriar, Rizky Qinthara; syahriar, ary
Jurnal Sains dan Teknologi Indonesia Vol. 8 No. 3 (2006)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (144.147 KB) | DOI: 10.29122/jsti.v8i3.762

Abstract

A preliminary research on the roles of information can communication technology for poverty alleviation has been done. The research based on analysis of secondary data on ICT access and poverty data during the year 200-2006. It was found that there exist paradoxes where ICT infrastructure mainly concentrated in the capital city and other big cities but poverty mainly concentrated in rural area. These have created complex problem to solve poverty by using ICT. This paper is trying to introduce the roles of ICT and its solution in helping to reduce poverty in Indonesia.
DESAIN PANDU GELOMBANG PARALEL TERISOLASI DENGAN METHOD OF LINES Syahriar, ary
Jurnal Sains dan Teknologi Indonesia Vol. 8 No. 3 (2006)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (316.99 KB) | DOI: 10.29122/jsti.v8i3.759

Abstract

Optical directional couplers are fundamental building components for the design ofoptical circuits. The proper treatment of a device that couples the guided modes ofa waveguide with the radiation in free space is particularly difficult because of thecontinuum nature of the radiating modes. The desire of high-density integrationposes additional problems due to the fact that the simplest used couplingstructures need to be quite large. In order to reduce the size of the device we studynon-periodic structures based on air gap isolated directional couplers, for whichadditional degrees of freedom are available. The analysis of this type of structuresrequires a rigorous method for the solution of the field equations. We employ themethod of lines for the computation of such coupler characteristics.