Linear optoacoustic underwater communication

Blackmon, F.; Estes, Lee E.; Fain, G.

doi:10.1364/ao.44.003833

Cited by 41 publications

(28 citation statements)

References 4 publications

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“…The laser beam incident at the air-water boundary is exponentially attenuated by the medium, creating an array of thermo-acoustic sources relating to the heat energy and physical dimensions of the laser beam in water, thus producing local temperature fluctuations that give rise to volume expansion and contraction. The volume fluctuations in turn generate a propagating pressure wave with the acoustic signal characteristics of the laser modulation signal [55,56,57]. Controlling the rate of temperature fluctuations could provide a means of communication.…”

Section: Existing Optical Systemsmentioning

confidence: 99%

Design of a low-cost, underwater acoustic modem for short-range sensor networks

Benson

Kastner

et al. 2010

Oceans'10 Ieee Sydney

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Section: Existing Optical Systemsmentioning

confidence: 99%

Design of a low-cost, underwater acoustic modem for short-range sensor networks

Benson

Kastner

et al. 2010

Oceans'10 Ieee Sydney

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“…The vaporization mechanism has been used in laserinduced acoustic communication to underwater receivers by relying on on-off keying techniques [15], [50]. However, the pressure waves generated through the vaporization mechanism are not apt for an imaging system.…”

Section: B Laser Acoustic Excitationmentioning

confidence: 99%

An Airborne Sonar System for Underwater Remote Sensing and Imaging

2020

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High-resolution imaging and mapping of the ocean and its floor has been limited to less than 5% of the global waters due to technological barriers. Whereas sonar is the primary contributor to existing underwater imagery, the water-based system is limited in spatial coverage due to its low imaging throughput. On the other hand, aerial synthetic aperture radar systems have provided high-resolution imaging of the entire earth's landscapes but are incapable of deep penetration into water. In this work, we present a proofof-concept system which bridges the gap between electromagnetic imaging in air and sonar imaging in water through the laser-induced photoacoustic effect and high-sensitivity airborne ultrasonic detection. Here, we use air-coupled capacitive micromachined ultrasonic transducers (CMUTs) which is a critical differentiator from previous works and has enabled the acquisition of an underwater image from a fully airborne acoustic imaging system-a task that has yet to be accomplished in the literature. With the entire imaging system located on an airborne platform, there is much promise for the scalability of our system to one which could perform high-throughput imaging of underwater in large-scale deployment. Non-contact acousticbased imaging modalities are also of much interest to the medical imaging and non-destructive testing communities. Incorporating air-coupled transducers, for example CMUTs, or other resonant sensors in these applications could be aided by the analysis presented throughout this work. INDEX TERMS Capacitive micromachined ultrasonic transducer, CMUT, laser doppler vibrometer, laser ultrasound, non-destructive testing, photoacoustic, sonar, ultrasound, underwater imaging This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.

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“…In the linear regime of opticalacoustic conversion, the laser beam incident at the air-water boundary is exponentially attenuated by the medium, creating an array of thermo-acoustic sources related to the heat energy and physical dimensions of the laser beam in water, thus producing local temperature fluctuations that give rise to volume expansion and contraction. The volume fluctuations in turn generate a propagating pressure wave with the acoustic signal characteristics of the laser modulation signal [45][46][47]. Therefore, a number of acoustic signals such as frequency modulated sweeps (also known as CHIRPs), binary phase shift keyed (BPSK), QPSK, frequency shift keyed (FSK), and multi-frequency shift keyed (MFSK) signals can be created for communication purposes.…”

Section: Optical Communication (Ocomm) and Acousto-optical Hybridmentioning

confidence: 99%

Prospects and problems of wireless communication for underwater sensor networks

Liu

Zhou

Cui

2008

Wireless Communications

355

101

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SummaryThis paper reviews the physical fundamentals and engineering implementations for efficient information exchange via wireless communication using physical waves as the carrier among nodes in an underwater sensor network (UWSN). The physical waves under discussion include sound, radio, and light. We first present the fundamental physics of different waves; then we discuss and compare the pros and cons for adopting different communication carriers (acoustic, radio, and optical) based on the fundamental first principles of physics and engineering practice. The discussions are mainly targeted at underwater sensor networks (UWSNs) with densely deployed nodes. Based on the comparison study, we make recommendations for the selection of communication carriers for UWSNs with engineering countermeasures that can possibly enhance the communication efficiency in specified underwater environments.

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Linear optoacoustic underwater communication

Cited by 41 publications

References 4 publications

Design of a low-cost, underwater acoustic modem for short-range sensor networks

Design of a low-cost, underwater acoustic modem for short-range sensor networks

An Airborne Sonar System for Underwater Remote Sensing and Imaging

Prospects and problems of wireless communication for underwater sensor networks

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