{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/97798"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/97798","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Size and reflectivity dependent optical loss in oxide-confined vertical-cavity surface-emitting lasers","abstract":"Made available in DSpace on 2017-08-10T20:33:30Z (GMT). No. of bitstreams: 2 LAKOMY-THESIS-2017.pdf: 958914 bytes, checksum: 4bfff61cb428f89b6c2d81ea490c1d54 (MD5) LICENSE.txt: 4213 bytes, checksum: c559050e8766c9fd328f1cde81a9d514 (MD5) Previous issue date: 2017-04-28","abstract_html":"Made available in DSpace on 2017-08-10T20:33:30Z (GMT). No. of bitstreams: 2 LAKOMY-THESIS-2017.pdf: 958914 bytes, checksum: 4bfff61cb428f89b6c2d81ea490c1d54 (MD5) LICENSE.txt: 4213 bytes, checksum: c559050e8766c9fd328f1cde81a9d514 (MD5) Previous issue date: 2017-04-28","abstract_has_math":false,"creators":["Lakomy, Katherine A"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Electrical & Computer Engr","degree_department":null,"school":null,"contributors":["Choquette, Kent D."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2017,"date_issued":"2017-08-10T20:33:30Z","date_published":"2017-08-10T20:33:30Z","updated_at":"2026-07-22T22:24:34Z","subjects":["Vertical cavity surface-emitting laser (VCSEL)","Optical loss","Distributed Bragg reflector (DBR)","Reflectivity"],"languages":["en"],"rights":["Copyright 2017 Katherine Lakomy"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/97798","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Choquette, Kent D."]},{"key":"dc:creator","label":"Author","values":["Lakomy, Katherine A"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2017-08-10T20:33:30Z","2019-08-11T09:15:35Z","2017-04-28","2017-05"]},{"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":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"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 laser (VCSEL)","Optical loss","Distributed Bragg reflector (DBR)","Reflectivity"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2017 Katherine Lakomy"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/97798"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Made available in DSpace on 2017-08-10T20:33:30Z (GMT). No. of bitstreams: 2 LAKOMY-THESIS-2017.pdf: 958914 bytes, checksum: 4bfff61cb428f89b6c2d81ea490c1d54 (MD5) LICENSE.txt: 4213 bytes, checksum: c559050e8766c9fd328f1cde81a9d514 (MD5) Previous issue date: 2017-04-28","Embargo set by: Colleen Fallaw for item 102851 Lift date: 2019-08-10T21:27:21Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","U of I Only Restriction Lifted for Item 102851 on 2019-08-11T09:15:35Z.","This thesis characterizes the size and mirror reflectivity dependent optical loss in 850 nm vertical cavity surface-emitting lasers (VCSELs) to optimize future VCSEL designs. A theoretical and experimental study of the excess optical loss in small diameter VCSELs with varying output coupling mirror reflectivity is presented. The size-dependent loss is measured using an optical technique where the subthreshold mode spectral splitting is input into a simple fiber wave-equation analysis to extract the imaginary component of the refractive index in the oxide aperture region, which clads the VCSEL core. In general the optical loss, as measured from the effective index confinement of the oxide aperture, increases with decreasing oxide diameter. In addition the optical loss, for the smallest oxide diameters, increases with increasing mirror reflectivity. In comparison for broad area lasers, the mirror loss will increase with decreasing mirror reflectivity. A 2-dimensional simulation of mode profiles suggests the optical loss increases as the mirror reflectivity is increased due to the longer optical path length in the higher reflectivity mirrors.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-05-01","The student, Katherine Lakomy, accepted the attached license on 2017-04-27 at 12:56.","The student, Katherine Lakomy, submitted this Thesis for approval on 2017-04-27 at 13:03.","This Thesis was approved for publication on 2017-04-28 at 10:19.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11115 on 2017-08-10 at 15:07:13"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Size and reflectivity dependent optical loss in oxide-confined vertical-cavity surface-emitting lasers"]}]}],"canonical_facts":{"dc:contributor":["Choquette, Kent D."],"dc:creator":["Lakomy, Katherine A"],"dc:date":["2017-08-10T20:33:30Z","2019-08-11T09:15:35Z","2017-04-28","2017-05"],"dc:description":["Made available in DSpace on 2017-08-10T20:33:30Z (GMT). No. of bitstreams: 2 LAKOMY-THESIS-2017.pdf: 958914 bytes, checksum: 4bfff61cb428f89b6c2d81ea490c1d54 (MD5) LICENSE.txt: 4213 bytes, checksum: c559050e8766c9fd328f1cde81a9d514 (MD5) Previous issue date: 2017-04-28","Embargo set by: Colleen Fallaw for item 102851 Lift date: 2019-08-10T21:27:21Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","U of I Only Restriction Lifted for Item 102851 on 2019-08-11T09:15:35Z.","This thesis characterizes the size and mirror reflectivity dependent optical loss in 850 nm vertical cavity surface-emitting lasers (VCSELs) to optimize future VCSEL designs. A theoretical and experimental study of the excess optical loss in small diameter VCSELs with varying output coupling mirror reflectivity is presented. The size-dependent loss is measured using an optical technique where the subthreshold mode spectral splitting is input into a simple fiber wave-equation analysis to extract the imaginary component of the refractive index in the oxide aperture region, which clads the VCSEL core. In general the optical loss, as measured from the effective index confinement of the oxide aperture, increases with decreasing oxide diameter. In addition the optical loss, for the smallest oxide diameters, increases with increasing mirror reflectivity. In comparison for broad area lasers, the mirror loss will increase with decreasing mirror reflectivity. A 2-dimensional simulation of mode profiles suggests the optical loss increases as the mirror reflectivity is increased due to the longer optical path length in the higher reflectivity mirrors.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-05-01","The student, Katherine Lakomy, accepted the attached license on 2017-04-27 at 12:56.","The student, Katherine Lakomy, submitted this Thesis for approval on 2017-04-27 at 13:03.","This Thesis was approved for publication on 2017-04-28 at 10:19.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11115 on 2017-08-10 at 15:07:13"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/97798"],"dc:language":["en"],"dc:rights":["Copyright 2017 Katherine Lakomy"],"dc:subject":["Vertical cavity surface-emitting laser (VCSEL)","Optical loss","Distributed Bragg reflector (DBR)","Reflectivity"],"dc:title":["Size and reflectivity dependent optical loss in oxide-confined vertical-cavity surface-emitting lasers"],"dc:type":["text"],"thesis:degree_discipline":["Electrical & Computer Engr"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:34Z"}