Title :
A Linearized Optical Single-Sideband Modulation Analog Microwave Photonic Link Using Dual Parallel Interferometers
Author :
Zihang Zhu ; Shanghong Zhao ; Qinggui Tan ; Wei Jiang ; Yongjun Li ; Xuan Li
Author_Institution :
Sch. of Inf. & Navig., Air Force Eng. Univ., Xi´an, China
Abstract :
Dual parallel Mach-Zehnder interferometers (MZIs) are presented to linearize the optical single-sideband (OSSB) modulation analog microwave photonic link. By using a dual-drive Mach-Zehnder modulator at the transmit side of the link, an OSSB modulation can be obtained. By exploiting different RF responses of two MZIs at the receive end, the third-order intermodulation distortion (IMD3) is well suppressed and the spurious-free dynamic range (SFDR) is enhanced. More importantly, we demonstrate fundamental-to-IMD3 ratio of 49 dB for an RF input signal power value of 10 dBm, which is 24 dB more than a conventional OSSB modulation link, and SFDR of 132 dB for a bandwidth of 1 Hz at the received optical power of 8 dBm assuming shot noise is the dominant noise contribution, which is improved approximately 20 dB.
Keywords :
Mach-Zehnder interferometers; intermodulation distortion; microwave photonics; optical modulation; optical receivers; IMD3; MZI; OSSB modulation; SFDR; analog microwave photonic link; dual parallel Mach-Zehnder interferometers; dual-drive Mach-Zehnder modulator; linearized optical single-sideband modulation; receive end; spurious-free dynamic range; third-order intermodulation distortion; Amplitude modulation; Microwave photonics; Optical fiber communication; Optical fibers; Optical interferometry; Optical modulation; Microwave photonic link; dual parallel interferometers; linearized; optical single-sideband modulation;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2013.2281613