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oai:www.ideals.illinois.edu:2142/80804 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Coleman, James J. Swint, Reuel Bennett 2015-09-25T20:08:14Z 2015-09-25T20:08:14Z 10000-01-01 2002 2002 The central thesis of this work is that structures can be integrated into the laser that introduce optical loss to only high-order lateral modes and thus prevent them from lasing and degrading the beam quality. Several concepts for modifying the lateral waveguide to create filtering of the lateral modes are examined, including the use of waveguide bend loss, waveguide frustration, and the addition of scattering loss. Each of the concepts tested improves the stability of the beam and prevents the oscillation of high order modes. Stable single lateral mode output power is demonstrated in lasers over the entire range of drive currents tested when frustrating waveguide filters or frustrating scattering waveguide filters are incorporated into the devices. This improves the single lateral mode power output from 500 mW to 800 mW. Made available in DSpace on 2015-09-25T20:08:14Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3070451.pdf: 3730226 bytes, checksum: a4648135424341da96b16cbb5c4ea0ba (MD5) Previous issue date: 2002 Embargo set by: Seth Robbins for item 82086 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 93 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2002. http://hdl.handle.net/2142/80804 (MiAaPQ)AAI3070451 eng Engineering, Electronics and Electrical Spatial Mode Filters for Control of Lateral Modes in High Power Semiconductor Lasers text Electrical Engineering Electrical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.