Chip-scale hybrid optical sensing systems using digital signal processing

Cho, Sang-Yeon; Borah, Deva K.

doi:10.1364/oe.17.000150

Cited by 2 publications

(3 citation statements)

References 26 publications

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“…Additionally, different resonances, separated by the FSR, can shift an entire FSR between sampling as a result of large index changes, therefore temporal sampling of the spectrum must be sufficient to resolve such large spectral shifts. Thus, spectral shift measurement typically requires measurement of the resonator output spectrum as a function of time, which is more difficult and expensive to integrate in a compact, planar format than are simple photodetectors, although spectral measurements at the chip scale are under development [56].…”

Section: Planar Microresonators and Microresonator Sensorsmentioning

confidence: 99%

“…A hybrid measurement scheme has also been suggested, that utilizes a broad band source to address the sensor, enabling the measurement of a power spectrum without the need for sweeping action [56]. This hybrid method utilizes an arrayed waveguide grating and multiple photodetectors coupled with digital processing to sample intensity at several wavelengths and estimate the resonator spectrum from the sampled points.…”

Section: Planar Microresonators and Microresonator Sensorsmentioning

confidence: 99%

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Chip scale integrated microresonator sensing systems

Jokerst¹,

Royal

Palit

et al. 2009

Journal of Biophotonics

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Medicine, environmental monitoring, and security are application areas for miniaturized, portable sensing systems. The emerging integration of sensors with other components (electronic, photonic, fluidic) is moving sensing toward higher levels of portability through the realization of self-contained chip scale sensing systems. Planar optical sensors, and in particular, microresonator sensors, are attractive components for chip scale integrated sensing systems because they are small, have high sensitivity, can be surface customized, and can be integrated singly or in arrays in a planar format with other components using conventional semiconductor fabrication technologies. This paper will focus on the progress and prospects for the integration of microresonator sensors at the chip scale with photonic input/output components and with sample preparation microfluidics, toward self-contained, portable sensing systems.

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Section: Planar Microresonators and Microresonator Sensorsmentioning

confidence: 99%

Section: Planar Microresonators and Microresonator Sensorsmentioning

confidence: 99%

Chip scale integrated microresonator sensing systems

Jokerst¹,

Royal

Palit

et al. 2009

Journal of Biophotonics

View full text Add to dashboard Cite

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“…In practical sensing scenarios, WGM optical sensors are often simultaneously subject to multiple stimuli, which affect both the accuracy and sensitivity of the measurement. Digital signal processing methods, e.g., maximum likelihood estimation, can contribute to extracting useful information from a noisy environment with a limited number of spectral sampling points 29 . Furthermore, through signal processing and learning approaches, we could assemble multiple WGM sensor nodes to form a sensor array to acquire more accurate results.…”

mentioning

confidence: 99%

Wireless whispering-gallery-mode sensor for thermal sensing and aerial mapping

Chen

Zhao

et al. 2018

Light Sci Appl

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The Internet of Things (IoT)1,2 employs a large number of spatially distributed wireless sensors to monitor physical environments, e.g., temperature, humidity, and air pressure, and has many applications, including environmental monitoring3, health care monitoring4, smart cities5, and precision agriculture. A wireless sensor can collect, analyze, and transmit measurements of its environment1,2. Currently, wireless sensors used in the IoT are predominately based on electronic devices that may suffer from electromagnetic interference in many circumstances. Being immune to the electromagnetic interference, optical sensors provide a significant advantage in harsh environments6. Furthermore, by introducing optical resonance to enhance light–matter interactions, optical sensors based on resonators exhibit small footprints, extreme sensitivity, and versatile functionalities7,8, which can significantly enhance the capability and flexibility of wireless sensors. Here we provide the first demonstration of a wireless photonic sensor node based on a whispering-gallery-mode (WGM) optical resonator, in which light propagates along the circular rim of such a structure like a sphere, a disk, or a toroid by continuous total internal reflection. The sensor node is controlled via a customized iOS app. Its performance was studied in two practical scenarios: (1) real-time measurement of the air temperature over 12 h and (2) aerial mapping of the temperature distribution using a sensor node mounted on an unmanned drone. Our work demonstrates the capability of WGM optical sensors in practical applications and may pave the way for the large-scale deployment of WGM sensors in the IoT.

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Chip-scale hybrid optical sensing systems using digital signal processing

Cited by 2 publications

References 26 publications

Chip scale integrated microresonator sensing systems

Chip scale integrated microresonator sensing systems

Wireless whispering-gallery-mode sensor for thermal sensing and aerial mapping

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