Photonic Generation of Linearly Frequency-Modulated Waveform with Improved Time-Bandwidth Product

被引：0
|
作者：
Zhang, Yamei [1 ]
Ye, Xingwei [1 ]
Pan, Shilong [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Minist Educ, Key Lab Radar Imaging & Microwave Photon, Nanjing 210016, Jiangsu, Peoples R China
来源：
2015 INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP) | 2015年
关键词：
Linear frequency modulation; time-bandwidth product; microwave photonics;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Linear frequency-modulated (LFM) waveforms can be photonically generated by introducing a parabolic phase difference to two phase-correlated optical wavelengths followed by optical heterodyning, but the maximal achievable time-bandwidth product (TBWP) is limited by the modulation index of the electro-optic modulator, which is independent of the bandwidth or duration of the input signal. In this paper, a novel approach to increase the TBWP is proposed and demonstrated by splitting the electrical parabolic signal into N pieces with identical amplitudes. Although the bandwidth or the time duration of the input signal is increased by N times, the TBWP of the generated LFM waveform is improved by N times. A proof-of-concept experiment is carried out. As compared with the scheme using conventional parabolic signal, the TBWP is improved by more than 45 times.
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页数：4
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