Phase-coded microwave signals generation using a dual parallel construction including two phase modulators

• Published in: Optics and laser technology Vol. 105; pp. 135 - 138
• Main Authors: Wang, Fei, Yu, Qiong, Gu, Jun, Lu, Youxi
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.09.2018; Elsevier BV
• Subjects: Beams (radiation); Binary codes; Compression ratio; Microwave photonics; Microwave pulse compression; Microwaves; Modulators; Optical generation of microwave signal; Optics; Phase coded; Phase modulator (PM); Pulse compression; Radar; Radio frequency; Radio signals; Signal generation; Waveform analysis; Wireless communications; Phase coded; Microwave pulse compression; Phase modulator (PM); Optical generation of microwave signal
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/j.optlastec.2018.02.045

•A photonic approach to realizing binary phase-coded microwave signal generation was proposed.•The binary phase-coded microwave waveform with a π phase shift was achieved.•The proposed approach exhibits a good pulse compression performance. A photonic approach to realizing binary phase-coded microwave signal generation using a dual parallel construction including two phase modulators (PMs) was proposed and demonstrated. A beam CW is split into two beams light wave with equal power in the dual parallel construction, one beam is modulated in a PM driven by a radio frequency (RF) microwave signal in the upper arm, and the other beam is modulated by another PM driven by a binary coding electrical pulse sequence in the under arm, then the two phase-modulated beams combine and interfere. When the interference light field is send to a high-speed photodetector (PD) for beating, 2 Gbit/s binary phase-coded 10 GHz and 2.5 Gbit/s phase-coded 20 GHz microwave waveform with a π phase shift was respectively achieved, and corresponding pulse compression ratio is 20 and 16.5, respectively. The obtained phase-coded microwave signals exhibit a good pulse compression performance, which can find potential applications in modern radar systems and wireless communications.