title: Coherent BOTDA sensor with intensity modulated local light and IQ demodulation.
abstract: Coherent Brillouin optical time domain analysis (BOTDA) sensing system with intensity modulated local (IML) light and fast IQ demodulation is proposed and demonstrated. IML light instead of phase modulated local (PML) light is utilized to reduce the coherent and multiple sidebands induced noises. A spatial resolution of 3-m and ± 1.8°C temperature accuracy at the far end of the fiber are obtained over 40-km sensing distance.
authors.forename: Zonglei
authors.initials: Z
authors.lastname: Li
authors.forename: Lianshan
authors.initials: L
authors.lastname: Yan
authors.forename: Liyang
authors.initials: L
authors.lastname: Shao
authors.forename: Wei
authors.initials: W
authors.lastname: Pan
authors.forename: Bin
authors.initials: B
authors.lastname: Luo