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2004 Annual Report


Head Letter

Chair Letter

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Beyond Imaging

Photonic Biomedicine

Cell Behavior

No-Kill Sensors

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Hokie Suit

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ECE Research Update

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Cognitive Radio

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UWB Lab

High-Temp Sensor

Cell phone detector

Optical Cryptography

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IPEMs

Die-Attach

R&D 100 Award

Electronic Noses

Distributed Generation

USG

$1000 Elevator

Embedded Systems

Defect Tolerance

Efficiency Tools

Pervasive Networks

Video Networks

Networked Testbeds

Real-Time Solutions

2002/2003 Ph.D.s

2003 Patents

 

 

 

Special Report:
ECEs and Biomedicine

April 2004

 

For more information, visit the Center for Photonics Technology.

Yizheng Zhu cleaves fiber during fabrication of a miniature sensor. Zhu has developed the smallest known high-temperature pressure sensor.

World's smallest high-temp pressure sensor

The world’s smallest known high temperature pressure sensor is a mere 125 microns in diameter and can function at temperatures as high as 700° C. Currently available sensors are limited to use in temperatures as high at 500° C.

Developed by Yizheng Zhu, a Ph.D. student in the Center for Photonics Technology (CPT), the sensor is fabricated directly on the tip of a fiber by micromachining and thermal fusion, giving it the same thickness as the optical fiber.

The sensor has minimal cross-sensitivity to temperature, resulting in a simplified sensor system with a wide temperature range. Its small size and low mass give the sensor an extremely high resonant frequency, resulting in a flat response over a very wide range of frequencies.

Sensitivity can be adjusted for different applications, with a pressure range as low as a few psi or as large as 10,000 psi. The sensor is another step toward CPT’s goal of developing pressure sensors that can operate above 1000°.

 
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Last updated: Wed, Jun 9, 2004