Photonic generation of a parabolic-shaped microwave signal and dual-linear-chirp microwave waveform

被引:20
作者
Kumar, Ritesh [1 ]
Raghuwanshi, Sanjeev Kumar [1 ]
机构
[1] Indian Sch Mines, Dept Elect Engn, Indian Inst Technol, Dhanbad 826004, Jharkhand, India
关键词
MODULATOR; PULSE;
D O I
10.1364/AO.394499
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Based on an external modulation technique through a dual-polarized dual-parallel Mach-Zehnder modulator, a photonic technique is proposed for the generation of a microwave signal with a parabolic shape. An optically modulated waveform from the modulator is passed through an optical bandpass filter, which results in parabolic signals of 1 GHz and 9 GHz frequencies at the photo detector. A peak power spectral component of -30 dBm power is obtained at 1 GHz and 9 GHz frequencies of the parabolic signal. Based on the present methodology, a parabolic signal of the desired frequency band can be obtained. The obtained signal is processed to generate a duallinear-chirp signal by passing through the phase modulator. Here, a dual-linear-chirp microwave waveform with a chirp rate of 1.53 Pi x 10(19) Hz/s is achieved at 6 GHz center frequency. The results are obtained through MATLAB simulation and verified by experimental results. A fair agreement is found between the result obtained through MATLAB simulation and the result obtained by experimental verification. (C) 2020 Optical Society of America
引用
收藏
页码:6024 / 6029
页数:6
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