2026-09-19T16:08:40Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/46669 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Choquette, Kent D. Choquette, Kent D. Coleman, James J. Popescu, Gabriel Wasserman, Daniel M. Johnson, Matthew 2014-01-16T17:58:30Z 2014-01-16T17:58:30Z 2013-12 2014-01-16T17:58:30Z 2013-12 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. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2013-08-30T14:18:19Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Johnson_Matthew.docx: 41316896 bytes, checksum: 3f1656b858f11194d9c03ac9c906261b (MD5) Johnson_Matthew.pdf: 4822931 bytes, checksum: bba4f87f301a33e42f862ff761fff4f8 (MD5) Made available in DSpace on 2014-01-16T17:58:30Z (GMT). No. of bitstreams: 3 Matthew_Johnson.pdf: 8242855 bytes, checksum: 457fe5b4ae266c919e09661294c32d6e (MD5) Johnson_Matthew.docx: 41316896 bytes, checksum: 3f1656b858f11194d9c03ac9c906261b (MD5) license.txt: 4065 bytes, checksum: 457ba08715d857a2d0bb23c1d65464fd (MD5) http://hdl.handle.net/2142/46669 en Copyright 2013 Matthew Johnson 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 Coherently-coupled vertical-cavity laser arrays text Electrical & Computer Eng 1933 Electrical & Computer Engr 1200 University of Illinois at Urbana-Champaign Dissertation Ph.D. PHD:Electr & Computer Eng-UIUC 10KS1200PHD