We describe hybrid distributed optical fiber sensor schemes for temperature, strain and vibration measurements. In particular, we first introduce the use of cyclic Simplex coding in hybrid Raman/BOTDA distributed sensors for fast long-distance strain and simultaneous temperature measurements over the same SMF, using a single narrowband source. The same advanced coding technique is also proposed to demonstrate a hybrid distributed acoustic and temperature sensor (DATS) based on Raman and coherent Rayleigh scattering processes in a standard SMF, using a single commercial off-the-shelf DFB laser and a common receiver block.
|Titolo:||Hybrid distributed optical fiber sensors for temperature, strain and vibration measurements|
|Data di pubblicazione:||2015|
|Appare nelle tipologie:||4.1 Contributo Atti Congressi/Articoli in extenso|