We have developed a miniaturized silicon photonics short-wave infrared spectrophotometer that fits in a wrist-based wearable device. Our device has the capability for non-invasive and real-time measurement of various physiologic biochemistries that cannot be interrogated with the same accuracy when using light emitting diodes (LEDs) and common photoplethysmography (PPG) applications. By producing many discrete and individually addressable laser diodes on a single photonics integrated circuit together with wavelength multiplexing and on-chip wavelength and power monitoring, our platform enables novel commercial applications, including the ability to sense hydration status, core body temperature, alcohol consumption, lactate threshold, and glucose levels.
In this presentation I will give an overview of Rockley Photonics’ real-time, non-invasive biomarker sensing-on-the-wrist integrated photonics technology, and the application of silicon photonics plus AI for smart consumer wearable health sensing applications. I will describe the silicon photonics building blocks needed to make the necessary integrated photonics platform as well as application of AI to provide multi-application, health-related sensing and monitoring applications. I will describe how this platform can provide personalized monitoring of multiple biophysical and biochemical biomarkers, by combining laser-based spectrophotometer capabilities with on-device analytics and a cloud platform which augments stand-alone capabilities with predictive analytics based on biomarker trends.
Silicon photonics is poised to bring photonic integrated circuit (PIC) technologies to a range of solutions in imaging and sensing, providing the advantages of increased power efficiency, size reductions, and lower-cost packaging. Compared to conventional silicon photonics architectures, our platform uses larger, multi-micron waveguides, and holds the key to optimizing PIC performance, power efficiency, manufacturability and versatility. Our technology brings performance advantages such as low propagation losses, efficient integration of III-V actives, and high power handling, and we have demonstrated photonic integrated circuits with high levels of integration with a full suite of devices including hybrid lasers, compact arrayed waveguide grating filters, high-speed modulators and detectors and efficient out-couplers. We will discuss applications ranging from consumer devices to healthcare to automotive.
Self-assembled quantum dot (QD) Semiconductor Optical Amplifiers (SOAs) are believed to have faster carrier recovery times than conventional multiple quantum well, or bulk SOAs. It is therefore of interest to study the carrier dynamics of QD SOAs to assess their potential as ultrafast nonlinear devices for switching and signal processing. In this work we report experimental characterization of the ultrafast carrier dynamics of a novel InAs/InGaAsP self-assembled QD SOA with its peak gain in the important 1.55 μm telecommunications wavelength range. The temporal dynamics are measured with a heterodyne pump-probe technique with 150 fs resolution. The measurements show carrier heating dynamics with lifetimes of 0.5-2.5 ps, and a 13.2 ps gain recovery, making the device a promising candidate for ultrafast switching applications. The results are compared to previous reports on QD amplifiers operating in the 1.3 μm and 1.1 μm spectral regions. This report represents the first study of the temporal dynamics of a QD SOA operating at 1.55 μm.
Conference Committee Involvement (9)
Silicon Photonics XX
28 January 2025 | San Francisco, California, United States
Silicon Photonics XIX
29 January 2024 | San Francisco, California, United States
Silicon Photonics XVIII
30 January 2023 | San Francisco, California, United States
Silicon Photonics XVII
24 January 2022 | San Francisco, California, United States
Silicon Photonics XVI
6 March 2021 | Online Only, California, United States
Silicon Photonics XV
3 February 2020 | San Francisco, California, United States
Silicon Photonics XIV
4 February 2019 | San Francisco, California, United States
Silicon Photonics XIII
29 January 2018 | San Francisco, California, United States
Silicon Photonics XII
30 January 2017 | San Francisco, California, United States
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