Abstract
Stimulated Brillouin scattering (SBS)-based distributed fiber optic sensing technique has found pervasive applications in measurement of real-world environmental variables. Its sensing capability, however, is affected by the tradeoff between sensing distance and spatial resolution. Herein, we propose and experimentally verify a wideband Brillouin amplification (WBA)-boosted BOCDA to achieve the high spatial resolution sensing in a longer distance. The WBA is generated by exploiting phase-uncorrelated SBS process between pump and probe waves. Through the WBA, the pump pulses at different scanning frequencies are amplified with the same ratio, which brings distortion-free enhancement of Brillouin signals. The signal-enhancement improves the sensing distance of high spatial resolution BOCDA. As a result, without any additional (Raman/Brillouin) amplification devices, a ∼0.46 MHz measurement certainty and a 6 cm spatial resolution are achieved over a ∼40 km sensing range. The proposed method offers a viable solution for the applications that need high-resolution measurement of remote targets.
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription