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15 March 2023 Revolutionizing High-Speed Data Transmission: The Transverse Coupled Cavity VCSEL
Hamed Dalir, Elham Heidari, Behrouz Movahhed Nouri, Volker Sorger
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Proceedings Volume PC12419, Ultrafast Phenomena and Nanophotonics XXVII; (2023) https://doi.org/10.1117/12.2650994
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
Vertical-Cavity Surface-Emitting Lasers (VCSELs) have become the preferred option for energy-efficient, high-speed optical interconnects in data centers and supercomputers due to their cost-effectiveness and reliability. However, current VCSELs have limitations in modulation speeds, with a roll-off of 20 GHz. In this work, we propose a novel hexagonal transverse-coupled-cavity design that adiabatically couples through a central cavity. Through this design, we have successfully developed a prototype VCSEL with a 3-dB roll-off modulation bandwidth of 45 GHz, an improvement of five times that of a standard VCSEL on the same epiwafer. This design utilizes the Vernier effect to widen the laser's aperture, extending the dynamic roll-off point and increasing power output. With the increased modulation speed and output power, this new VCSEL design offers new possibilities for data communication, sensing, automotive, and photonic AI systems.
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Hamed Dalir, Elham Heidari, Behrouz Movahhed Nouri, and Volker Sorger "Revolutionizing High-Speed Data Transmission: The Transverse Coupled Cavity VCSEL", Proc. SPIE PC12419, Ultrafast Phenomena and Nanophotonics XXVII, (15 March 2023); https://doi.org/10.1117/12.2650994
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KEYWORDS
Vertical cavity surface emitting lasers
Modulation
Semiconductor lasers
Signal to noise ratio
Photodetectors
Reliability
Resistance
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