Title :
UWB Monocycle Generation and Bi-Phase Modulation Based on Mach–Zehnder Modulator and Semiconductor Optical Amplifier
Author :
Yu, Yuan ; Dong, Jianji ; Li, Xiang ; Zhang, Xinliang
Author_Institution :
Wuhan Nat. Lab. for Optoelectron., Huazhong Univ. of Sci. & Technol., Wuhan, China
fDate :
4/1/2012 12:00:00 AM
Abstract :
We propose and experimentally demonstrate an approach in generating a pair of polarity-reversed ultra-wideband (UWB) monocycle pulses by using a Mach-Zehnder modulator (MZM) and a semiconductor optical amplifier (SOA). The monocycle polarity is controlled by adjusting the bias voltage of the MZM to make the bias point located at the positive or the negative slope of the modulation curve. The generated UWB monocycles with different injection currents of SOA, different bias voltages of MZM, different optical pulse widths, and different optical carrier wavelengths are experimentally studied and analyzed. The bi-phase modulation (BPM) of monocycle pulse by applying nonreturn-to-zero (NRZ) data to the radio frequency (RF) port of MZM is also proposed and investigated.
Keywords :
microwave photonics; optical communication equipment; optical modulation; semiconductor optical amplifiers; ultra wideband communication; Mach-Zehnder modulator; UWB monocycle generation; biphase modulation; nonreturn-to-zero data; polarity reversed ultrawideband monocycle pulse; radio frequency; semiconductor optical amplifier; Nonlinear optics; Optical modulation; Optical pulse generation; Optical pulses; Radio frequency; Semiconductor optical amplifiers; Mach–Zehnder modulator (MZM); Ultra-wideband (UWB); bi-phase modulation (BPM); counter-phase modulation; in-phase modulation; semiconductor optical amplifier (SOA);
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2011.2180014
