Abstract
The limit of sensing resolution of water temperature by remote Raman spectroscopy was investigated experimentally. A remote Raman spectrometer, which employed a telescope of 20 cm in pupil size and the second harmonic generation (SHG) of a -switched Nd:YAG laser, was used for the measurement. By analyzing the broad O–H stretching Raman band located near , a parameter which is in second-order polynomial relation with water temperature from 13°C to 50°C could be obtained. The resolution of our remote Raman temperature sensor was better than with measurement time shorter than 10 s. The influence of the Raman signal’s signal-to-noise ratio on the resolution and salinity effect on the accuracy of temperature sensing were also investigated.
© 2015 Optical Society of America
Full Article | PDF ArticleMore Like This
Maurizio Becucci, Stefano Cavalieri, Roberto Eramo, Lorenzo Fini, and Marzia Materazzi
Appl. Opt. 38(6) 928-931 (1999)
D. A. Leonard, B. Caputo, and F. E. Hoge
Appl. Opt. 18(11) 1732-1745 (1979)
C. P. Artlett and H. M. Pask
Opt. Express 23(25) 31844-31856 (2015)