Multiwavelength detection for drift compensation in fiber optic chemical sensors

Michael D. DeGrandpre

doi:10.1117/12.170669

10 March 1994 Multiwavelength detection for drift compensation in fiber optic chemical sensors

Michael D. DeGrandpre

Proceedings Volume 2068, Chemical, Biochemical, and Environmental Fiber Sensors V; (1994) https://doi.org/10.1117/12.170669
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

This paper describes results using a nonabsorbing wavelength as an internal reference to correct for nonanalyte-related signal changes and long-term drift in an absorbance-based fiber optic sensor. A renewable-reagent sensor developed for seawater pCO₂ (CO₂ partial pressure) was repetitively calibrated over a 12-day period and the drift in the calibration was studied. The results indicate that although the internal reference significantly improves the long-term performance, it does not fully correct for all sources of drift over the 12-day period.

Citation Download Citation

Michael D. DeGrandpre "Multiwavelength detection for drift compensation in fiber optic chemical sensors", Proc. SPIE 2068, Chemical, Biochemical, and Environmental Fiber Sensors V, (10 March 1994); https://doi.org/10.1117/12.170669

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