Photonic generation of tunable dual-chirp microwave waveforms using a dual-beam optically injected semiconductor laser

被引:21
|
作者
Zhou, Pei [1 ]
Chen, Hao [2 ]
Li, Nianqiang [1 ]
Zhang, Renheng [1 ]
Pan, Shilong [2 ]
机构
[1] Soochow Univ, Sch Optoelect Sci & Engn, Suzhou 215006, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Minist Educ, Key Lab Radar Imaging & Microwave Photon, Nanjing 210016, Peoples R China
关键词
TRANSMISSION; FIBER;
D O I
10.1364/OL.385527
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
An approach to generating dual-chirp microwave waveforms (DCMWs) is proposed and experimentally demonstrated. The proposed scheme consists of a typical semiconductor slave laser (SL), which is subject to a dual-beam optical injection from two master lasers with one being positively detuned (ML1) and the other negatively detuned (ML2) from the SL. Under proper injection conditions, the SL operates in the so-called Scenario B of dual-beam injection. After optical-to-electrical conversion, a dual-frequency microwave signal can be generated with one of its two frequencies increasing linearly and the other decreasing linearly as the ML1 injection strength is increased. By incorporating a fast injection strength controller (formed by an intensity modulator and an electrical control signal), a DCMW with a large time-bandwidth product can be generated. In the experimental demonstration, a DCMW with a temporal period of 1 mu s has been obtained. This simultaneously offers an up-chirp (13.4-20.2 GHz) and a down-chirp (27.3-20.5 GHz), and its frequency tunability has been achieved by simply adjusting the injection parameters. Furthermore, the auto-ambiguity function of the generated DCMW has also been investigated, which proves that the proposed scheme has the ability to improve the range-velocity resolution and, thus, could be promising for use in radar systems. (C) 2020 Optical Society of America
引用
收藏
页码:1342 / 1345
页数:4
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