Abstract

This paper presents an instantaneous microwave frequency measurement scheme based on a frequency-phase mapping technique. In our scheme, a low-frequency (LF) reference signal and two microwave signals with a relative time delay are modulated on the optical carriers via two dual-parallel Mach–Zehnder modulators. The generated electrical signal has the same frequency as that of the LF reference signal, but with a phase shift, which depends on the microwave signal frequency and the time delay. Therefore, a linear frequency-phase mapping function with a high slope is constructed, which improves the accuracy of the whole frequency measurement range. The scheme has a compact structure without an optical filter and polarization devices, which enhances the long-term stability of the system. The simulation shows that our scheme has a 4.1–40 GHz frequency measurement range with errors less than ±0.04 GHz.

© 2023 Optica Publishing Group

Instantaneous microwave frequency measurement with single branch detection based on the birefringence effect

Wei Zhu, Jing Li, Li Pei, Tigang Ning, Jingjing Zheng, and Jianshuai Wang
Appl. Opt. 61(20) 5894-5901 (2022)

Measurement and analysis of instantaneous microwave frequency based on an optical frequency comb

Yongfeng Wei, Ximin Wang, Yingxi Miao, Jialiang Chen, Xin Wang, and Caili Gong
Appl. Opt. 61(23) 6834-6840 (2022)

Multiple microwave frequency measurement system based on a sawtooth-wave-modulated non-flat optical frequency comb

Wei Zhu, Jing Li, Miaoxia Yan, Li Pei, Tigang Ning, Jingjing Zheng, and Jianshuai Wang
Appl. Opt. 61(35) 10499-10506 (2022)

Photonic instantaneous microwave frequency measurement with adjustable measurement range based on an electro-optical polarization modulator

Yanting Guo and Jianxin Ma
Appl. Opt. 59(7) 1808-1816 (2020)

Microwave photonics broadband unambiguous frequency measurement based on a Sagnac loop and a linear optical filter

Yinling Zhang, Tao Shang, Gufeng Li, Xiongchao Liu, Dan Chen, and Zhaokun Li
Appl. Opt. 61(17) 5090-5097 (2022)