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George Barbastathis. Waller, Laura A. (Laura Ann) Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science 2006-07-13T15:19:51Z 2006-07-13T15:19:51Z 2005 2005 http://hdl.handle.net/1721.1/33383 62558888 Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005. Page 78 blank. Vita. Includes bibliographical references (p. 69). I designed a capacitive sensor with feedback control for precision tuning of a MEMS controlled wavelength-selective switch. The implementation is based upon a customized feedback loop with a PID controller. The positional stability of the bridge can be controlled to within 0.5 [Angstroms], and the tuner has a time constant of 1 gs for the desired 5V actuation voltages. I created a realistic noise model for the capacitive sensor circuit and its controller, and added this to the noise models already developed for the device. Using these models, the parameters of the system can easily be changed to model device performance under varying conditions and device iterations. I also developed an equipment test set-up for accurately measuring the optical properties, both spectral and temporal, of these devices. The apparatus can be modified slightly to be used in testing of other integrated optoelectronic devices. The procedure for aligning lensed fibers to integrated waveguides and optimizing light throughput is described, and some test device values are presented. by Laura A. Waller. M.Eng. 78 p. 3374959 bytes 3378130 bytes application/pdf application/pdf 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. Feedback loop design and experimental testing for integrated optics with micro-mechanical tuning Thesis application/pdf Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="b562d12a-4a6a-41cb-9591-38149db5fe9b"> <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>Feedback loop design and experimental testing for integrated optics with micro-mechanical tuning</Title> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>2005</PublicationDate> <Authors> <Author> <DisplayName>Waller, Laura A. (Laura Ann)</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>I designed a capacitive sensor with feedback control for precision tuning of a MEMS controlled wavelength-selective switch. The implementation is based upon a customized feedback loop with a PID controller. The positional stability of the bridge can be controlled to within 0.5 [Angstroms], and the tuner has a time constant of 1 gs for the desired 5V actuation voltages. I created a realistic noise model for the capacitive sensor circuit and its controller, and added this to the noise models already developed for the device. Using these models, the parameters of the system can easily be changed to model device performance under varying conditions and device iterations. I also developed an equipment test set-up for accurately measuring the optical properties, both spectral and temporal, of these devices. The apparatus can be modified slightly to be used in testing of other integrated optoelectronic devices. The procedure for aligning lensed fibers to integrated waveguides and optimizing light throughput is described, and some test device values are presented.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>