Photonic frequency converter for spectrally agile seamless access network in millimeter-wave band

研究了一种新型光相位调制器单波长和双波长调制的光子下变频技术。我们比较了系统的特性，并在系统的43和52 GHz频段上传输了高阶正交调幅（QAM）正交频分复用（OFDM）信号。我们还演示了第一个利用光子下变频在上行方向透明传输100 ghz无线电信号的无线电-光纤-无线电-光纤系统。我们在100 ghz频段成功地在系统上传输了线路速率为30和40 Gb/s的16-QAM单载波和OFDM信号。我们提出并开发了一种集成电光频域均衡器的低损耗高带宽铌酸锂调制器。制备的ti扩散铌酸锂调制器光损耗低至5.4 dB，半波电压低至3.7 V，带宽超过110 GHz。

We studied photonic downconversion technology using single and dual wavelength modulation by a newly fabricated optical phase modulator. We compared the system characteristics and transmitted high-order quadrature amplitude modulation (QAM) orthogonal frequency-division multiplexing (OFDM) signals in the 43 and 52 GHz bands over the system. We also demonstrated the first radio-fiber-radio-fiber system for transparent delivery of 100-GHz radio signals in the uplink direction using photonic down-conversion. We successfully transmitted 16-QAM single-carrier and OFDM signals with line rates of 30 and 40 Gb/s over the system in the 100-GHz band. We proposed and developed a low-loss and high-bandwidth lithium niobate modulator integrated with an electro-optic frequency-domain equalizer. The fabricated Ti-diffused lithium niobate modulator has a low optical loss of 5.4 dB, low half-wave voltage of 3.7 V, and high bandwidth exceeding 110 GHz.