Signorini, A.Faralli, S.Soto, M. A.Sacchi, G.Baronti, F.Barsacchi, R.Lazzeri, A.Roncella, R.Bolognini, G.Di Pasquale, F.2012-11-012012-11-012012-11-01201010.1364/OFC.2010.OWL2https://infoscience.epfl.ch/handle/20.500.14299/86481We propose a new Raman based distributed measurement technique which allows for temperature sensing over nearly 40 km of graded index multimode optical fiber with meter-scale spatial resolution and temperature accuracy better than 3°C. © 2010 Optical Society of America.text::conference output::conference proceedings::conference paper