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ANALYSIS AND DESIGN OF CLEAVED EDGE
LITHIUM NIOBATE WAVEGUIDE RESONATORS
by
Satsuki Takahashi
||||||||||||||||||||||||||||||||{
A Dissertation Presented to the
FACULTY OF THE USC GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Ful llment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(ELECTRICAL ENGINEERING)
August 2012
Copyright 2012 Satsuki Takahashi
Object Description
| Title | Analysis and design of cleaved edge lithium niobate waveguide resonators |
| Author | Takahashi, Satsuki |
| Author email | satsukit@usc.edu;satsuki.takahashi@gmail.com |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Electrical Engineering |
| School | Viterbi School of Engineering |
| Date defended/completed | 2012-06-08 |
| Date submitted | 2012-07-06 |
| Date approved | 2012-07-06 |
| Restricted until | 2012-07-06 |
| Date published | 2012-07-06 |
| Advisor (committee chair) | Steier, William Henry |
| Advisor (committee member) |
Armani, Andrea M. Sawchuk, Alexander A. (Sandy) |
| Abstract | An electro-optic resonant modulator consists of a dielectric material that responds to an applied electric field by way of amplitude modulation, as an optical signal propagates through and resonates within. This work focuses on the analysis and fabrication of the resonator. The resonator is of a Fabry-Perot type, employing a titanium indiffused lithium niobate waveguide as the optical guide. The resonator is an integrated device and able to be fiber pigtailed, to be used as a remote device. A z-cut lithium niobate resonator with dielectric mirror coatings was fabricated with a finesse of 14, for the TM-like mode at an operating wavelength of 1.55 micrometers. The cleavage planes of lithium niobate are investigated and incorporated in the final design of the resonator. The cleaved edges eliminate the need for the edge polishing that is used for the mirrors of the Fabry-Perot resonant cavity. The desired cleaved edges require the use of a x-cut lithium niobate substrate, with differing orientations of the titanium indiffused waveguide for the ordinary and extraordinary modes. This dissertation presents a theoretical analysis of the electromagnetic wave in a medium with off-diagonal components in the permittivity tensor, as is necessary for the cleaved edge resonator geometry. A theoretical analysis of the electro-optic effect for the cleaved edge geometry is also presented. A cleaved edge titanium indiffused lithium niobate resonator was fabricated, and resonances were observed at 13.5 GHz and 14.3 GHz for the ordinary and extraordinary modes, respectively with 2 nm gold coated facets, at an operating wavelength of 1.3 micrometers. Given the useable cleavage planes of z-cut lithium niobate, an equilateral triangle resonator is proposed. The theoretical and experimental results contained in this dissertation validate the feasibility and viability of a Fabry-Perot resonator as a modulating medium. |
| Keyword | optical resonators; electro-optic modulators; anisotropic waveguides; waveguide resonators; equilateral triangle resonators |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m |
| Contributing entity | University of Southern California |
| Rights | Takahashi, Satsuki |
| Physical access | The author retains rights to his/her dissertation, thesis or other graduate work according to U.S. copyright law. Electronic access is being provided by the USC Libraries in agreement with the author, as the original true and official version of the work, but does not grant the reader permission to use the work if the desired use is covered by copyright. It is the author, as rights holder, who must provide use permission if such use is covered by copyright. The original signature page accompanying the original submission of the work to the USC Libraries is retained by the USC Libraries and a copy of it may be obtained by authorized requesters contacting the repository e-mail address given. |
| Repository name | University of Southern California Digital Library |
| Repository address | USC Digital Library, University of Southern California, University Park Campus MC 7002, 106 University Village, Los Angeles, California 90089-7002, USA |
| Repository email | cisadmin@lib.usc.edu |
| Archival file | uscthesesreloadpub_Volume4/etd-TakahashiS-921.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Repository email | cisadmin@lib.usc.edu |
| Full text | ANALYSIS AND DESIGN OF CLEAVED EDGE LITHIUM NIOBATE WAVEGUIDE RESONATORS by Satsuki Takahashi ||||||||||||||||||||||||||||||||{ A Dissertation Presented to the FACULTY OF THE USC GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Ful llment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (ELECTRICAL ENGINEERING) August 2012 Copyright 2012 Satsuki Takahashi |
