A novel direct detection microwave photonic vector modulation scheme for radio-over-fiber system

Chun-Ting Lin*, Sheng Peng Dai, Jye-Hong Chen, Po Tsung Shih, Peng Chun Peng, Sien Chi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

This letter demonstrates the feasibility of a novel direct detection microwave photonic vector modulation scheme for the radio-over-fiber (RoF) system. Unlike the traditional double-sideband with optical carrier suppression modulation scheme, which can carry only the on-off keying data format, the proposed scheme encodes the electrical vector signal on either the upper sideband (USB) or the lower sideband (LSB) only and a pure optical subcarrier on the other sideband. Therefore, phase and amplitude information will be preserved after direct detection. A frequency doubling scheme is employed to reduce the cost of RoF systems. Additionally, the relative intensity between USB and LSB can be easily tuned by adjusting the individual power of electrical driving signals to optimize the performance of the optical radio-frequency signals. A proof-of-concept experiment is conducted by using a 1.25 Gb/s BPSK signal at a carrier frequency of 20 GHz. After transmission over 50-km single-mode fiber, the receiver sensitivity penalty is less than 0.5 dB.

Original languageAmerican English
Pages (from-to)1106-1108
Number of pages3
JournalIEEE Photonics Technology Letters
Volume20
Issue number13
DOIs
StatePublished - 1 Jul 2008

Keywords

  • Mach-Zehnder modulator (MZM)
  • Photonic vector signal
  • Radio-over-fiber (RoF)

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