Title

Photonically controlled ultrasonic arrays: scenarios and systems

Abstract

Wavelength diversity coupled with fiber-based time delay, optical energy delivery, and ultrasonic energy generation and sensing, are proposed for the first time to form a novel, rapidly tunable (e.g., 1 Khz-100 Mhz) and wide instantaneous bandwidth (e.g., > 50% bandwidth at center carrier), ultrasonic probe system. This novel photonic system can be used for a wide variety of ultrasonic applications such as therapy, diagnostics, and non-invasive surgery, particularly for intracavity operation with a typical 100 channel/transducer element count. This ultrasonic system architecture relies on a novel multiwavelength optical delay line module using two high speed (i.e., < 10 microseconds wavelength switching time), bulk acousto-optic tunable filters, that provide collinear, high power, multi-wavelength optical input and output beams. This wavelength selection module also provides high optical throughput (e.g., 85% efficiency), and excellent, e.g., < -30 dB optical or < -60 dB electrical blockage of the unwanted leakage (undiffracted) light, preventing noise propagation when such modules are cascaded to provide switched signal time delays.

Publication Date

12-1-1996

Publication Title

Proceedings of the IEEE Ultrasonics Symposium

Volume

2

Number of Pages

1545-1550

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

0030361397 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0030361397

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