Abstract
High-capacity transmission laser is essential for increasing information transmission and improving digital applications. The future high-capacity, short-reach data-communication links require 850 nm vertical cavity surface emitting lasers (VCSELs) in virtue of such benefits as low threshold current, high modulation bandwidth, good circular beam quality, cost-effective fabrication, and low power consumption. In this paper, top-emitting, high-speed, oxide-confined 850 nm VCSELs were designed, fabricated, and characterized. Compared with the traditional GaAs/AlGaAs quantum well (QW) structure, we illustrated the differential gain coefficient increased with optimized InGaAs/AlGaAs QW from the simulation results of Cross-light software; Micro-cavity structure consisting of a modulation-gradients distributed Bragg reflector (DBR) is designed and optimized; then the influences on threshold current and differential resistance of oxide-aperture were investigated; Finally, voltage and output power against bias current, spot, and beam divergence angles were measured and analyzed.
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Liu, P. et al. (2016). The Design and Fabrication of High Efficiency Low Beam Divergence 850 nm VCSELs for High Capacity Optical Transmission. In: Zeng, QA. (eds) Wireless Communications, Networking and Applications. Lecture Notes in Electrical Engineering, vol 348. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2580-5_68
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DOI: https://doi.org/10.1007/978-81-322-2580-5_68
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