title: Fiber-distributed Ultra-wideband noise radar with steerable power spectrum and colorless base station.
abstract: A fiber-distributed Ultra-wideband (UWB) noise radar was achieved, which consists of a chaotic UWB noise source based on optoelectronic oscillator (OEO), a fiber-distributed transmission link, a colorless base station (BS), and a cross-correlation processing module. Due to a polarization modulation based microwave photonic filter and an electrical UWB pass-band filter embedded in the feedback loop of the OEO, the power spectrum of chaotic UWB signal could be shaped and notch-filtered to avoid the spectrum-overlay-induced interference to the narrow band signals. Meanwhile, the wavelength-reusing could be implemented in the BS by means of the distributed polarization modulation-to-intensity modulation conversion. The experimental comparison for range finding was carried out as the chaotic UWB signal was notch-filtered at 5.2 GHz and 7.8 GHz or not. Measured results indicate that space resolution with cm-level could be realized after 3-km fiber transmission thanks to the excellent self-correlation property of the UWB noise signal provided by the OEO. The performance deterioration of the radar raised by the energy loss of the notch-filtered noise signal was negligible.
authors.forename: Jianyu
authors.initials: J
authors.lastname: Zheng
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.forename: Jianbin
authors.initials: J
authors.lastname: Fu
authors.forename: Li
authors.initials: L
authors.lastname: Wei
authors.forename: Shilong
authors.initials: S
authors.lastname: Pan
authors.forename: Lixian
authors.initials: L
authors.lastname: Wang
authors.forename: Jianguo
authors.initials: J
authors.lastname: Liu
authors.forename: Ninghua
authors.initials: N
authors.lastname: Zhu