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On-Chip Wireless Optical Broadcast Interconnection Network

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5 Author(s)
Hongyu Zhou ; Dept. of Electr., Comput., & Energy Eng., Univ. of Colorado at Boulder, Boulder, CO, USA ; Zheng Li ; Li Shang ; Mickelson, A.
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An on-chip wireless optical broadcast network for future multicore CPU interconnections is introduced in this paper. A baseline topology is composed of 32 identical transmitting/receiving optical dielectric rod antennas arranged around a circular ring. To ensure balanced power distribution between the channels, the optical antenna design was governed by the antennas' far-field radiation pattern and near-field coupling. Over the frequency range of 172 THz (1750 nm) and 222 THz (1350 nm), the broadcasting network has average and minimum transmissions of -16 and -21.5 dB, respectively. The overall transmission efficiency is maintained above 70% throughout the operating bandwidth. Results are confirmed by the full-wave simulations based on finite integration and finite element methods. For additional validation, an eight-channel microwave broadcasting network is fabricated, and excellent agreement between the full-wave design and measurements are obtained.

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Lightwave Technology, Journal of  (Volume:28 ,  Issue: 24 )