Ultrasonic detector using vertical cavity surface emitting laser

Details Ultrasonic detector using vertical cavity surface emitting laser Ultrasonic detector using vertical cavity surface emitting laser

1995-03-31

1996-12-31

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Acoustic image conversion

367149, 367140, 73655, H04R 2300

Patent

active

055900909

ABSTRACT:
An ultrasound/vibration detector array includes an electrically pumped vertical cavity surface emitting laser (VCSEL) array. The cavity length of each laser or pixel of the array is modulated by the acoustic field at the point where the acoustic field contacts the pixels. The resulting laser output is frequency modulated by the acoustic field. This modulation is converted to amplitude modulation at the detector head and then either detected with a charge-coupled-device (CCD) array with the information being electrically communicated to the signal processing assembly or sent directly by optical fiber to the signal processing assembly for processing. This ultrasound/vibration detector array provides high frequency bandwidth detection, fine spatial resolution, and minimal electric cabling.

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