Dual-functional frequency and phase measurement system based on photonics assisted Brillouin technique induced carrier processing

• Published in: Optics and laser technology Vol. 157; p. 108747
• Main Authors: Wang, Di, Zhang, Xindong, Zhou, Yu, Yang, Zhangyi, Dong, Wei
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2023
• Subjects: Brillouin technique; Dual-function measurement system; Microwave photonics; Brillouin technique; Microwave photonics; Dual-function measurement system
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/j.optlastec.2022.108747

•A dual-functional frequency and phase measurement link is proposed.•The frequency response of the link is changed based on SBS-induced carrier processing.•The frequency/phase-to-power mapping method is used to achieve the measurement.•Frequency and phase measurement range from 0.2 to18 GHz and 0 to 2π are proved. Microwave photonic frequency measurement with large bandwidth is of great importance in radio-frequency (RF) receiver. Meanwhile, phase identification is also an essential link for an intercept receiver. Here, we report and demonstrate a dual-functional frequency and phase measurement system with frequency measurement error of 0.12 GHz, 0.2–18 GHz measurement range, and ultrahigh phase resolution of 0.05 degree within the range of 2π. The record performance is accomplished by shifting the phase of the optical carrier within a narrow bandwidth based on stimulated Brillouin scattering (SBS), which can provide the desired frequency response through PM to IM conversion. Ultimately, the frequency/phase-to-power mapping is utilized to extract the information of the received RF signal. The results point to potential applications for satellite communications, radars, and electronic countermeasures.