Title :
A photonic frequency downconverter based on a single dual-drive Mach-Zehnder modulator
Author :
Zhenzhou Tang ; Fangzhen Zhang ; Dan Zhu ; Xihua Zou ; Shilong Pan
Author_Institution :
Microwave Photonics Res. Lab., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
A novel photonic frequency downconverter is proposed and demonstrated using a single dual-drive Mach-Zehnder modulator (DMZM). In the proposed scheme, the local oscillator (LO) and radio frequency (RF) signals are sent to the two RF ports of the DMZM, respectively. By biasing the modulator at the minimum transmission point, a downconverted intermediate frequency (IF) signal with the RF and LO components suppressed is obtained. An experiment is carried out to demonstrate the feasibility of the downconverter. Results show that a 30-GHz RF signal with 50-Mbaud 16 quadrature amplitude modulation (QAM) is successfully downconverted to the 2.4-GHz IF band. The error vector magnitude (EVM) of the downconverted signal is less than 2.0%.
Keywords :
optical communication equipment; optical frequency conversion; optical modulation; quadrature amplitude modulation; radio-over-fibre; DMZM; EVM; LO component; QAM; RF component; downconverted intermediate frequency signal; error vector magnitude; frequency 2.4 GHz; frequency 30 GHz; local oscillator signals; photonic frequency downconverter; quadrature amplitude modulation; radio frequency signals; single dual-drive Mach-Zehnder modulator; Frequency modulation; Microwave amplifiers; Microwave filters; Microwave photonics; Radio frequency; dual-drive Mach-Zehnder modulator; frequency downconversion; microwave photonics; radio over fiber;
Conference_Titel :
Microwave Photonics (MWP), 2013 International Topical Meeting on
Conference_Location :
Alexandria, VA
DOI :
10.1109/MWP.2013.6724042
