%0 Figure %A Li, Yueqin %A Pei, Li %A Li, Jing %A Wang, Yiqun %A Yuan, Jin %A Ning, Tigang %D 2017 %T Schematic of the proposed IFM system. %U https://plos.figshare.com/articles/figure/Schematic_of_the_proposed_IFM_system_/5275369 %R 10.1371/journal.pone.0182231.g001 %2 https://plos.figshare.com/ndownloader/files/9030880 %K ACF %K frequency measurement %K single-polarization dual-wavelength laser %K PM-FBG %K IFM %K polarization-maintaining fiber Bragg grating %K laser power fluctuation %K measurement range %K frequency measurement range %K wideband microwave signals %K tunable measurement range %K amplitude comparison function %X

(a) The system consists of a single-polarization dual-wavelength laser, two polarization controllers (PCs), a polarization modulator (PolM), a polarization-maintaining Bragg grating (PM-FBG), a single mode fiber (SMF), a wavelength division multiplexer (WDM), two photodetectors (PDs) and a processing unit. The modulator is driven by a voltage of radio frequency (VRF) and is adjusted by a DC bias voltage (Vbias). (b) Evolution happens from location I to II in optical spectra and polarization (x and y axes are the principal axes of PolM, xʹ and y′ axes are the fast and slow axes of PM-FBG).

%I PLOS ONE