Precise, rugged spectrum-based calibration of distributed anti-Stokes Raman thermometry systems

Amitabha Datta; Uvaraj Gajendran; Vinayak Srimal; Deepa Venkitesh; Balaji Srinivasan

doi:10.1117/12.904327

29 November 2011 Precise, rugged spectrum-based calibration of distributed anti-stokes raman thermometry systems

Amitabha Datta, Uvaraj Gajendran, Vinayak Srimal, Deepa Venkitesh, Balaji Srinivasan

Proceedings Volume 8311, Optical Sensors and Biophotonics III; 83110E (2011) https://doi.org/10.1117/12.904327
Event: SPIE/OSA/IEEE Asia Communications and Photonics, 2011, Shanghai, China

Abstract

We report the development of a rugged calibration method based on the measurement of the spectral response of a distributed anti-Stokes Raman thermometry (DART) system. Due to the presence of a high level of Rayleigh scattered signal in the Stokes channel, we find that the temperature measurement may be more precise if we use the Rayleigh signal as reference for the anti-Stokes thermometry. Moreover, we find that the temperature measurement needs to be calibrated for the loss spectrum of the optical components used in the system. Based on such an algorithm, we have demonstrated a prototype which is capable of sensing temperatures up to 90 °C with an accuracy of 2 °C over distances up to 6.5 km with 8 m spatial resolution.

Citation Download Citation

Amitabha Datta, Uvaraj Gajendran, Vinayak Srimal, Deepa Venkitesh, and Balaji Srinivasan "Precise, rugged spectrum-based calibration of distributed anti-stokes raman thermometry systems", Proc. SPIE 8311, Optical Sensors and Biophotonics III, 83110E (29 November 2011); https://doi.org/10.1117/12.904327

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