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CMOS integrated optical sensor using phase detection

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6 Author(s)
Chodavarapu, Vamsy P. ; Dept. of Electr. Eng., State Univ. of New York, Buffalo, NY, USA ; Khanolkar, S.P. ; Tehan, E.C. ; Titus, A.H.
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In this paper, we present an integrated fiber optic sensor based on a phase detection technique. The operation principle of the sensor as a xerogel based oxygen sensor has been demonstrated The integrated device includes a light emitting diode, an oxygen sensing probe and a CMOS Integrated Circuit (IC). The CMOS IC combines the LED driver circuitry, optical detector and the phase detector circuitry on a single chip. The integrated sensor provides accurate, low cost and low power detection for quantifying oxygen and for recording excited-state lifetimes ranging from nanoseconds to milliseconds.

Published in:

Sensors, 2003. Proceedings of IEEE  (Volume:2 )

Date of Conference:

22-24 Oct. 2003