search query: @keyword attenuation / total: 6
reference: 2 / 6
Author: | Khanna, Amit |
Title: | Characterization of Silicon Micro-Optical Waveguides |
Publication type: | Master's thesis |
Publication year: | 2008 |
Pages: | 55 Language: eng |
Department/School: | Elektroniikan, tietoliikenteen ja automaation tiedekunta |
Degree programme: | Elektroniikan ja sähkötekniikan tutkinto-ohjelma |
Main subject: | Optoelektroniikka (S-104) |
Supervisor: | Honkanen, Seppo |
Instructor: | Säynätjoki, Antti |
Electronic version URL: | http://urn.fi/urn:nbn:fi:tkk-012416 |
OEVS: | Electronic archive copy is available via Aalto Thesis Database.
Instructions Reading digital theses in the closed network of the Aalto University Harald Herlin Learning CentreIn the closed network of Learning Centre you can read digital and digitized theses not available in the open network. The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/ You can read theses on the Learning Centre customer computers, which are available on all floors.
Logging on to the customer computers
Opening a thesis
Reading the thesis
Printing the thesis
|
Location: | P1 Ark S80 | Archive |
Keywords: | silicon optics silicon photonics attenuation Bragg mirror birefringence transmission spectrum amorphous silicon strip waveguides SOI waveguides |
Abstract (eng): | In modern electronic circuitry, electrical interconnects have not kept pace with increasing electronic processing speed. Various drawbacks of electrical domain viz. bandwidth limitation, signal delay, electromagnetic wave phenomenon propelled the use of optical fibers. Optical waveguides provide a novel solution because of the absence of these phenomena in the optical domain. Various materials like polymers, III-V semiconductor compounds, LiNbO3 etc. have been analyzed for fabricating optical waveguides. We have chosen silicon as a material for optical waveguides. Silicon is extensively used for complimentary metal oxide semiconductor (CMOS) transistor fabrication. Thus, to use silicon for fabricating optical components is highly favorable from a technological standpoint. In this thesis, we characterize silicon optical waveguides. Loss in 10µm wide hydrogenated amorphous silicon (a-Si:H) strip optical waveguides is estimated to be 1.5dB/cm and 0.1dB/cm in rib type silicon on insulator (SOI) optical waveguides. Reflectivity of Bragg mirror on a-Si:H strip waveguides is in the range 49-86%. We measured 0.5-1dB loss per etched mirror section for fundamental transverse electric (TE) and transverse magnetic (TM) modes propagating in SOI rib waveguide. A setup to measure birefringence in optical waveguides is discussed and its results are analyzed. Ellipsometry of 260nm thick layer of a-Si:H, deposited by plasma enhanced chemical vapor deposition (PECVD), is done to ascertain the material refractive index. Spectral behavior of a-Si:H waveguides using a supercontinuum source is also studied. |
ED: | 2008-12-11 |
INSSI record number: 36596
+ add basket
INSSI