TY - JOUR
T1 - The effect of mode spacing on the speed of quantum-well microcavity lasers
AU - Wu, C. H.
AU - Tan, F.
AU - Feng, M.
AU - Holonyak, N.
N1 - Funding Information:
N. Holonyak, Jr., is grateful for the support of the John Bardeen Chair (Sony) of Electrical and Computer Engineering and Physics, and M. Feng for the support of the Nick Holonyak, Jr., Chair of Electrical and Computer Engineering. The authors would like to thank Dr. Michael Gerhold (Army Research Office) and acknowledge the support by Army Research Office, Grant No. W911NF-08-1-0469.
PY - 2010/8/30
Y1 - 2010/8/30
N2 - Oxide-confined quantum-well microcavity vertical-cavity surface-emitting lasers (VCSELs) of three-diameters (aperture size dA ∼2, 2.5, and 3.5 μm) have been fabricated that operate as nearly single-mode lasers at ultralow thresholds ITH =0.15, 0.16, and 0.20 mA. Relative spectral intensities are measured at a set higher bias current I=0.8 mA for the three VCSEL sizes to determine the dependence on mode spacing between the fundamental and second order modes, which at increasing diameter are Δ λ∼2.2, 1.6, and 1.0 nm. By studying the side-mode suppression ratio and the optical microwave frequency response of the microcavity VCSELs throughout a spread-out group of modes, we are able to resolve the dependence of signal amplitude and time response on the difference in mode spacing, Δ λ, higher speed response occurring at larger Δ λ.
AB - Oxide-confined quantum-well microcavity vertical-cavity surface-emitting lasers (VCSELs) of three-diameters (aperture size dA ∼2, 2.5, and 3.5 μm) have been fabricated that operate as nearly single-mode lasers at ultralow thresholds ITH =0.15, 0.16, and 0.20 mA. Relative spectral intensities are measured at a set higher bias current I=0.8 mA for the three VCSEL sizes to determine the dependence on mode spacing between the fundamental and second order modes, which at increasing diameter are Δ λ∼2.2, 1.6, and 1.0 nm. By studying the side-mode suppression ratio and the optical microwave frequency response of the microcavity VCSELs throughout a spread-out group of modes, we are able to resolve the dependence of signal amplitude and time response on the difference in mode spacing, Δ λ, higher speed response occurring at larger Δ λ.
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U2 - 10.1063/1.3485048
DO - 10.1063/1.3485048
M3 - Article
AN - SCOPUS:77956358583
SN - 0003-6951
VL - 97
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 9
M1 - 091103
ER -