Title :
Transmission of Wireless and Wired Services Employing a Simple System Architecture
Author :
Wen-Jr Jiang ; Chun-Ting Lin ; Po-Tsung Shih ; Yu-Hung Chen ; Chen, J. ; Sien Chi
Author_Institution :
Dept. of Photonics, Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
4/15/2010 12:00:00 AM
Abstract :
This letter presents a novel modulation approach for simultaneous generation and transmission of optical radio-frequency (RF) wireless vector signal and baseband (BB) wireline signal using a single-electrode Mach-Zehnder modulator. Based on a double sideband with carrier suppression scheme and properly predistorted driving vector signal, a 2.5-Gb/s quadrature phase-shift keying (QPSK) signal at 60 GHz is generated with a 1.25-Gb/s BB ON-OFF-keying (OOK) signal. The proposed system can carry higher spectral efficiency vector signals and needs no optical filter to separate the BB and RF signals at remote nodes. Moreover, optical RF signal generation with frequency doubling is also achieved to reduce the bandwidth requirement of the transmitter. After transmission over 25-km single-mode fiber, the power penalties of the generated QPSK and OOK signals are about 4 and 0.1 dB, respectively.
Keywords :
Mach-Zehnder interferometers; amplitude shift keying; frequency shift keying; optical harmonic generation; optical modulation; radio-over-fibre; Mach-Zehnder modulator; baseband wireline signal; bit rate 1.25 Gbit/s; bit rate 2.5 Gbit/s; double sideband with carrier suppression; frequency 60 GHz; on-off-keying; optical RF signal generation; optical frequency doubling; optical radiofrequency wireless vector signal; power penalty; quadrature phase-shift keying; radio-over-fibre; Baseband; Optical filters; Optical harmonic generation; Optical modulation; Optical transmitters; Phase shift keying; Quadrature phase shift keying; RF signals; Radio frequency; Signal generators; Mach–Zehnder modulator (MZM); optical frequency multiplication; optical millimeter-wave; radio-over-fiber (RoF); wavelength-division multiplexer (WDM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2041221
