Wideband Tunable Frequency Converter Based on an OEO Using a DP-QPSK Modulator

被引：4
作者：
Ding, Qi [1 ]
Wang, Muguang [1 ]
Mu, Hongqian [1 ]
Zhang, Jing [1 ]
Han, Mengyao [1 ]
Liu, Yan [1 ]
Zhang, Jianyong [1 ]
Fan, Guofang [1 ]
机构：
[1] Beijing Jiaotong Univ, Inst Lightwave Technol, Minist Educ, Key Lab All Opt Network & Adv Telecommun Network, Beijing 100044, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2021年 / 33卷 / 24期
基金：
中国国家自然科学基金;
关键词：
Frequency conversion; Oscillators; Microwave oscillators; Microwave filters; Optical polarization; Microwave photonics; Optical modulation; microwave photonics; optoelectronic oscillator; wireless communication; UP-CONVERSION; MICROWAVE; RADIO; DOWNCONVERSION; SIGNAL;
D O I：
10.1109/LPT.2021.3130190
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Flexibility and tunability are critical for frequency conversion in antenna, radar and modern communication systems. In this study we propose and experimentally demonstrate a wideband tunable frequency converter by using an optoelectronic oscillator (OEO) to generate high-purity local oscillator (LO) signal for flexible frequency conversion. In the proposed frequency converter, a dual-polarization quadrature phase shift-keying (DP-QPSK) modulator is utilized to receive the signal to be converted and also to form a tunable OEO based on a dispersion-induced microwave photonic filter. By adjusting the bias voltage of the DP-QPSK modulator, an LO signal with accurate adjustable frequency is generated by the OEO. The measured phase noise of the generated LO signal can reach -110 dBc/Hz at 10 kHz offset frequency. An experiment is performed to verify the feasibility of this proposed frequency converter. The 7.6-GHz radio frequency (RF) signal is freely converted to different intermediate frequency (IF) signals, respectively. Moreover, the proposed microwave photonic converter is applied into wireless transmission systems. A 1-Gb/s NRZ wireless signal centered at 6.5 GHz is down-converted to baseband successfully.
引用
收藏
页码：1491 / 1494
页数：4
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