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We show the effects of shrinking the high contrast grating size on a wavelength-tunable VCSEL experimentally and theoretically. With a grating having only 4 periods, we demonstrate the fastest tunable VCSEL with speed >25 MHz.
Recent progress on fabrication technology and demonstration of current injection GaN-based blue VCSELs are presented. Performance of current injection blue VCSELs with threshold current of 1.4 mA and emission wavelength of 462 nm are described.
Quantum structure intermixing from lateral direction of the mesa sidewall is proposed for VCSELs. Ith decrease of 70% and etad increase of 75% were achieved by suppression of the surface recombination in the post-type VCSEL.
The authors report on strategies to achieve lasing in electrically driven vertical cavity surface emitting lasers at room temperature, namely the improvement of the quality factor of a microcavity suited for electrical injection, the use of a ZnO contact together with a dielectric current confinement layer and oxidized AlInN/GaN distributed Bragg reflectors.
We present the operation of electrically-injected 1528 nm GaInNAsSb vertical cavity surface emitting lasers grown on GaAs. Pulsed lasing at room temperature and continuous wave lasing at low temperatures are reported for the first time.
Advances in high-efficiency, large-area, surface-emitting photonic-crystal lasers have been developed to achieve peak emission powers of 35 W with a slope efficiency of 0.7 W/A for a total device area of ~0.4 mm2.
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