Abstract
The results of studying the dynamic characteristics of 1.55-μm single-mode vertical-cavity surface-emitting lasers (VCSELs) formed by the fusion of wafers of high-quality Bragg reflectors and an active region based on thin highly strained InGaAs/InAlGaAs quantum wells are presented. It is found that the proposed design of the active region and optical microcavity of the laser make it possible in principle to attain a high level of differential laser gain in the temperature range of 20°C–85°C, but weak electron localization leads to an increase in gain compression at elevated temperatures. Due to this fact, the VCSEL modulation bandwidth at 20°C can be increased from 9.2 to 11.5 GHz due to an increase in output optical losses, while the modulation bandwidth at 85°C does not exceed 8.5 GHz, depends weakly on the output optical losses, and is mainly limited by the optical-gain saturation.
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Funding
This work was supported by the Ministry of Science and Higher Education of the Russian Federation within the Federal target program “Research and Development in Priority Areas of the Science and Technology Complex of Russia for 2014–2020” (agreement no. 14.578.21.0253, unique identifier RFMEFI57817X0253).
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Blokhin, S.A., Bobrov, M.A., Blokhin, A.A. et al. Influence of Output Optical Losses on the Dynamic Characteristics of 1.55-μm Wafer-Fused Vertical-Cavity Surface-Emitting Lasers. Semiconductors 53, 1104–1109 (2019). https://doi.org/10.1134/S1063782619080074
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DOI: https://doi.org/10.1134/S1063782619080074