Chip-based microwave photonic frequency mixer (Invited)

被引：0
|
作者：
Li S. [1 ]
Cong R. [1 ]
Yao X. [1 ]
Feng J. [1 ]
Tang Z. [1 ]
Pan S. [1 ]
机构：
[1] Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
| 1600年 / Chinese Society of Astronautics卷 / 50期
关键词：
Integrated photonic chip; Microwave photonic frequency mixer; Microwave photonics;
D O I：
10.3788/IRLA20211056
中图分类号：
学科分类号：
摘要：
A microwave photonic frequency mixer constituted of an optically-carried local oscillator (LO) and a wavelength-division modulator was proposed. The wavelength-division modulator chip, which was consisted of a silicon phase modulator, two micro-ring filters, a photodetector, two optical couplers, and two grating couplers, was designed and fabricated. Based on the chip, a microwave photonic harmonic frequency mixer was implemented. In the experiment, an optically-carried LO was generated by double-sideband suppressed-carrier modulation at a Mach-Zehnder modulator. An RF signal from 6 to 16 GHz was successfully converted into a signal with a frequency of 33 to 23 GHz. In order to suppress the remaining mixing spurs, two solutions, i.e., increasing the rejection ratio of the micro-ring filter to decrease the intensity of the leaked optically-carried LO and introducing an optical phase shifter to correct the phase of the leaked optically-carried LO, were proposed and verified by simulation. It should be noted that the latter is simpler and more suitable for photonic integration. Copyright ©2021 Infrared and Laser Engineering. All rights reserved.
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