Abstract
An all-optical radio-over-fiber (RoF) link with double spectral-efficient transmission and compensation of chromatic dispersion-induced power fading is proposed and experimentally demonstrated. At the central office, a commercial dual-polarization quadrature phase-shift keying modulator is utilized to produce a polarization-multiplexed signal composed of two modulated microwave vector signals and an unmodulated optical carrier. At the remote node, by adjusting the polarization controller to introduce a proper phase shift to the unmodulated optical carrier, the two vector signals can be demodulated respectively and dispersion-induced power fading can be compensated simultaneously. The link performance is evaluated by error vector magnitude and bit error rate.
Highlights
R ADIO-OVER-FIBER (RoF) link is one research hotspot of microwave photonic link (MPL), which can take full advantage of wireless and optical worlds [1], [2]
An optical carrier with wavelength of 1552.20 nm and power of 12.5 dBm is produced by a laser source (Emcore1782) and it is directly sent into a commercial dual-polarization quadrature phase-shift keying (DP-QPSK) modulator (FTM7977HQA)
We propose and experimentally demonstrate an all-optical RoF link with simultaneous double spectral-efficient transmission and compensation of chromatic dispersion-induced power fading
Summary
R ADIO-OVER-FIBER (RoF) link is one research hotspot of microwave photonic link (MPL), which can take full advantage of wireless and optical worlds [1], [2]. These links using two free-running laser sources, narrow line-width laser sources and complex digital signal processing (DSP) algorithms are needed to reduce large phase noises [11] To solve this problem, in [12], a self-homodynedetected MPL is proposed, where a phase-modulated signal and an intensity-modulated signal are polarization multiplexed by a PDM-MZM and two signals are recovered via a self-homodyne scheme and a DSP unit. [13] proposed a simple method to transmit two vector signals on an optical carrier, where two signals are respectively amplitude and phase modulated by a dual-parallel MZM (DPMZM). Compared with traditional RoF links, the proposed scheme can transmit two microwave vector signals over an optical carrier, so its spectral efficiency is doubled. It can be applied in wireless access networks, optical fronthaul links for 5G and multiple-input multiple-output (MIMO) systems
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
