Instantaneous Frequency Measurement with Reasonable Resolution and Simple Structure

Qing-An Ding; Junkai Li; Huixin Liu; Xudong Cheng; Anhui Liang; Liuge Du; Li Zheng; Zhenfei Dai; Qunying Yang; Jun Li

doi:10.3390/photonics9100685

Photonics (Sep 2022)

Instantaneous Frequency Measurement with Reasonable Resolution and Simple Structure

Qing-An Ding,
Junkai Li,
Huixin Liu,
Xudong Cheng,
Anhui Liang,
Liuge Du,
Li Zheng,
Zhenfei Dai,
Qunying Yang,
Jun Li

Affiliations

Qing-An Ding: College of Electronic and Information Engineering, Shandong University of Science and Technology, 579 Front Bay Harbour Road, Qingdao 266590, China
Junkai Li: College of Electronic and Information Engineering, Shandong University of Science and Technology, 579 Front Bay Harbour Road, Qingdao 266590, China
Huixin Liu: College of Electronic and Information Engineering, Shandong University of Science and Technology, 579 Front Bay Harbour Road, Qingdao 266590, China
Xudong Cheng: College of Electronic and Information Engineering, Shandong University of Science and Technology, 579 Front Bay Harbour Road, Qingdao 266590, China
Anhui Liang: College of Electronic and Information Engineering, Shandong University of Science and Technology, 579 Front Bay Harbour Road, Qingdao 266590, China
Liuge Du: School of Information Science and Engineering, Shandong University, 72 Binhai Road, Jimo District, Qingdao 266237, China
Li Zheng: College of Electronic and Information Engineering, Shandong University of Science and Technology, 579 Front Bay Harbour Road, Qingdao 266590, China
Zhenfei Dai: College of Electronic and Information Engineering, Shandong University of Science and Technology, 579 Front Bay Harbour Road, Qingdao 266590, China
Qunying Yang: College of Electronic and Information Engineering, Shandong University of Science and Technology, 579 Front Bay Harbour Road, Qingdao 266590, China
Jun Li: College of Electronic and Information Engineering, Shandong University of Science and Technology, 579 Front Bay Harbour Road, Qingdao 266590, China

DOI: https://doi.org/10.3390/photonics9100685
Journal volume & issue: Vol. 9, no. 10
p. 685

Abstract

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Microwave signals carry important intelligence information in electronic warfare. Hence, the measurement of microwave signals plays a very important role. Traditional electronic microwave measurement systems are not appropriate for the instantaneous frequency measurement (IFM) of high-speed signals. A simple and low-cost photonic approach to the IFM based on frequency-to-power mapping is proposed and demonstrated with a reasonable resolution. The measurement is performed on account of a double Mach–Zehnder modulator (MZM), single-mode fiber (SMF), photodetector (PD), and signal processing. The scheme using four wavelengths achieves resolutions of ±0.1 and ±0.09 GHz respectively for the 15.8–18.4 and 18.4−21.2 GHz frequency measurement ranges. Therefore, the scheme is a broad prospects method for high-resolution IFM. Moreover, it is of great importance for applications in electronic warfare and high-resolution sensor systems.

Published in Photonics

ISSN: 2304-6732 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics
Website: http://www.mdpi.com/journal/photonics

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