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Physics Colloquium: AmphiLight: Direct Air-Water Communication with Laser Light

Wednesday, December 2, 2020
2:30 – 3:30 p.m.

Charlie Carver, FCRH’2018, of Dartmouth College, will present the “AmphiLight: Direct Air-Water Communication with Laser Light” lecture. Air-water communication is fundamental for efficient underwater operations, such as environmental monitoring, surveying, or coordinating heterogeneous aerial and underwater systems. Existing wireless techniques mostly focus on a single physical medium and fall short in achieving high-bandwidth bidirectional communication across the air-water interface. We propose a bidirectional, direct air-water wireless communication link based on laser light, capable of (1) adapting to water dynamics with ultrasonic sensing and (2) steering within a full 3D hemisphere using only a MEMS mirror and passive optical elements. In real-world experiments, our system achieves static throughputs up to 5.04 Mbps, zero-BER transmission ranges up to 6.1m in strong ambient light conditions, and connection time improvements between 47.1 percent and 29.5 percent during wave dynamics.


This event is open to alumni, faculty/staff, parents, students, and the public.