Device for spatially resolved temperature measurement

摘要

Apparatus for a spatially resolved temperature measurement, with at least one optical fiber (6) for the spatially resolved temperature measurement, and at least one laser light source (2) producing light (3, 23) which can be coupled into the optical fiber (6), wherein the portions of the light (3, 23) backscattered in the optical fiber (6) can be coupled out of the optical fiber (6) and evaluated. The apparatus further includes means for reducing polarization-induced effects, wherein the means may be, for example, a polarization modifier (4) capable of at least partially depolarizing the light (3).

主权项

1. A spatially resolved temperature measurement apparatus, comprising:
at least one optical fiber for the spatially resolved temperature measurement, at least one laser light source producing light that is coupled into the optical fiber, wherein portions of the light generated by the laser light source and backscattered in the optical fiber are coupled out of the optical fiber, and at least one filter for reducing polarization-induced effects of the spatially resolved temperature measurement, the at least one filter having properties, that differ for two orthogonal polarization directions or for each pair of mutually orthogonal polarization directions by less than 10%, wherein the at least one filter is wavelength selected to filter out Raman scattered radiation.