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Multijunction VCSELs with up to eight active regions are fabricated with integrated surface relief features for transverse mode suppression. Using this approach, we demonstrate a single mode 940nm VCSEL with a record high power of 14.2 and SMSR >30dB during room temperature, continuous wave operation.
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Matthew M. Dummer, Amirhossein Ghods, Guoyang Xu, Sara Rothwell, Klein Johnson, "Single-mode multi-junction VCSELs with integrated transverse mode filter," Proc. SPIE 12439, Vertical-Cavity Surface-Emitting Lasers XXVII, 1243908 (15 March 2023); https://doi.org/10.1117/12.2651698