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Leslie A. Kolodziejski. Shamir, Orit A Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science 2009-08-26T16:37:42Z 2009-08-26T16:37:42Z 2008 2008 http://hdl.handle.net/1721.1/46503 402772656 Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008. Includes bibliographical references (p. 129-132). Optical signal modulation is a cornerstone of communication, allowing the transfer of information by electrically encoding data onto an optical carrier. Modulation with ultra-broadband capability enables the generation of arbitrary waveforms using the electro-optic effect. By separating an incoming pulsed optical source into a frequency comb through the use of arrayed waveguide gratings, and employing both phase and amplitude modulation using Mach Zehnder Interferometers, an arbitrary waveform is constructed following frequency channel recombination. Modulation of frequency combs centered at an operational frequency of 800nm requires the use of GaAs-based and InP-based materials that are transparent at 800nm. The design and growth of III-V structures, the fabrication of ultra-broadband modulators and the design of arrayed waveguide gratings are detailed in this work. Three distinct structures are presented along with a compatible fabrication procedure for the construction of discrete modulators. The work is culminated with a discussion of further steps in the realization of an optical arbitrary waveform generating system. by Orit A. Shamir. M.Eng. 132 p. eng Massachusetts Institute of Technology M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 Electrical Engineering and Computer Science. Development of ultra-broadband modulators Thesis application/pdf false Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="42f5014d-af2d-4388-9db2-cda067bbcc0d"> <Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type> <Language>eng</Language> <Title>Development of ultra-broadband modulators</Title> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>2008</PublicationDate> <Authors> <Author> <DisplayName>Shamir, Orit A</DisplayName> <Affiliation> <OrgUnit> </OrgUnit> </Affiliation> </Author> </Authors> <Editors> </Editors> <Publishers> <Publisher> <DisplayName>Massachusetts Institute of Technology</DisplayName> <OrgUnit /> </Publisher> </Publishers> <License>http://dspace.mit.edu/handle/1721.1/7582</License> <Keyword>Electrical Engineering and Computer Science.</Keyword> <Abstract>Optical signal modulation is a cornerstone of communication, allowing the transfer of information by electrically encoding data onto an optical carrier. Modulation with ultra-broadband capability enables the generation of arbitrary waveforms using the electro-optic effect. By separating an incoming pulsed optical source into a frequency comb through the use of arrayed waveguide gratings, and employing both phase and amplitude modulation using Mach Zehnder Interferometers, an arbitrary waveform is constructed following frequency channel recombination. Modulation of frequency combs centered at an operational frequency of 800nm requires the use of GaAs-based and InP-based materials that are transparent at 800nm. The design and growth of III-V structures, the fabrication of ultra-broadband modulators and the design of arrayed waveguide gratings are detailed in this work. Three distinct structures are presented along with a compatible fabrication procedure for the construction of discrete modulators. The work is culminated with a discussion of further steps in the realization of an optical arbitrary waveform generating system.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>