{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/46669"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/46669","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Coherently-coupled vertical-cavity laser arrays","abstract":"Coherently-coupled vertical cavity surface-emitting laser (VCSEL) arrays offer a unique approach to beam steering and high-radiance applications, and have many advantages such as small size, low cost, high speed, durability and manufacturing ease. Previous work on coherently-coupled VCSEL arrays has left unfinished the tasks of determining the beam steering mechanism within the arrays and achieving current uniformity across large arrays without resorting to overly-complicated fabrication procedures. This work fulfills the former by establishing a full theoretical connection between the differential current injected into the array elements and the observed steering of the far-field beam. Record high beam-steering speed and phase responsivity are also demonstrated, showing promise for applications in high-speed modulation. The first in-phase emission from a coherently-coupled bottom-emitting VCSEL array is also demonstrated, along with significantly improved current uniformity across larger arrays.","abstract_html":"Coherently-coupled vertical cavity surface-emitting laser (VCSEL) arrays offer a unique approach to beam steering and high-radiance applications, and have many advantages such as small size, low cost, high speed, durability and manufacturing ease. Previous work on coherently-coupled VCSEL arrays has left unfinished the tasks of determining the beam steering mechanism within the arrays and achieving current uniformity across large arrays without resorting to overly-complicated fabrication procedures. This work fulfills the former by establishing a full theoretical connection between the differential current injected into the array elements and the observed steering of the far-field beam. Record high beam-steering speed and phase responsivity are also demonstrated, showing promise for applications in high-speed modulation. The first in-phase emission from a coherently-coupled bottom-emitting VCSEL array is also demonstrated, along with significantly improved current uniformity across larger arrays.","abstract_has_math":false,"creators":["Johnson, Matthew"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Electrical & Computer Engr","degree_department":null,"school":null,"contributors":["Choquette, Kent D.","Coleman, James J.","Popescu, Gabriel","Wasserman, Daniel M."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-01-16T17:58:30Z","date_published":"2014-01-16T17:58:30Z","updated_at":"2026-07-22T22:25:36Z","subjects":["vertical cavity surface-emitting lasers","beam steering","phased array","optical phased array","semiconductor laser array","diode laser array","coupled mode theory","dynamic coupled mode theory"],"languages":["en"],"rights":["Copyright 2013 Matthew Johnson"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/46669","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Choquette, Kent D.","Coleman, James J.","Popescu, Gabriel","Wasserman, Daniel M."]},{"key":"dc:creator","label":"Author","values":["Johnson, Matthew"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-01-16T17:58:30Z","2013-12"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical & Computer Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["vertical cavity surface-emitting lasers","beam steering","phased array","optical phased array","semiconductor laser array","diode laser array","coupled mode theory","dynamic coupled mode theory"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2013 Matthew Johnson"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/46669"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Coherently-coupled vertical cavity surface-emitting laser (VCSEL) arrays offer a unique approach to beam steering and high-radiance applications, and have many advantages such as small size, low cost, high speed, durability and manufacturing ease. 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