Optical converting type ultrasonic receiving apparatus

Details Optical converting type ultrasonic receiving apparatus Optical converting type ultrasonic receiving apparatus

2006-01-10

2006-01-10

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C385S007000, C385S010000

Reexamination Certificate

active

06984819

ABSTRACT:
An ultrasonic receiving apparatus is equipped with such a condition capable of obtaining superior sensitivities. This ultrasonic receiving apparatus includes: an ultrasonic detecting element for modulating light on the basis of ultrasonic waves applied thereto, the ultrasonic detecting element including an ultrasonic sensible portion having a length not larger than ¾ of a wavelength of ultrasonic waves propagated therethrough; and a photodetector for detecting light output from the ultrasonic detecting element.

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Takahashi, Nobuaki, et al., “Underwater Acoustic Sensor with Fiber Bragg Grating”, Optical Review, vol. 4, No. 6 (1997) p. 691-694.
Uno, Yasuto et al., “Pressure Sensitivity of a Fiber-Optic Microprobe for High Frequency Ultrasonic Field”, Jpn. J. Appl. Phys. vol. 38 (1999) pp. 3120-3123.

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