In this paper, photonic generation and transmission technique for multi-format microwave waveform is proposed. In the center office, a broadband optical source (BOS) is utilized as optical carrier. And the main component is a dual-polarization dual-drive Mach–Zehnder modulator (DPol-DDMZM) followed by a polarization division multiplexed emulator (PDME). The DPol-DDMZM consists of two sub-DDMZMs to generate two orthogonally polarized optical signals. The system we proposed is conveniently reconfigured to generate different waveforms. By applying phase modulation (PM) to the orthogonal polarization states, a polyphase-coded microwave waveform with a tunable center frequency multiplication factor can be generated. By tuning the differential group delay (DGD) of the two polarizations by the PDME, the multiplication factor can be easily adjusted. In addition, if the carrier is suppressed at the upper and lower DDMZM, broadband dual-chirp microwave signal can be generated, transmitted over fiber and detected at a base station. The chromatic dispersion induced power fading is eliminated. The approach is investigated by simulations. Polyphase-coded signal with a repetition rate of 4 Gbit/s is demonstrated. And dual-chirp signal with a bandwidth of 8 GHz is carried out. Besides, the practical feasibility of the system is further studied by analyzing the power of the BOS, the relative time delay of PDME and the photonic integrated circuit (PIC) replica of the generator.

本文提出了多种格式微波波形的光子产生和传输技术。在中心办公室中，宽带光源（BOS）被用作光载体。并且主要组件是双极化双驱动马赫曾德尔调制器（DPol-DDMZM），然后是极化分割多路复用仿真器（PDME）。DPol-DDMZM由两个子DDMZM组成，以生成两个正交偏振的光信号。我们建议的系统可以方便地重新配置以生成不同的波形。通过对正交极化状态应用相位调制（PM），可以生成具有可调中心频率倍增系数的多相编码微波波形。通过PDME调整两个极化的差分群时延（DGD），可以轻松调节倍增系数。此外，如果载波在上DDMZM和下DDMZM处受到抑制，则宽带双线性调频微波信号可以生成，通过光纤传输并在基站进行检测。消除了色散引起的功率衰减。通过仿真研究了该方法。演示了具有4 Gbit / s重复率的多相编码信号。然后执行带宽为8 GHz的双线性调频信号。此外，通过分析BOS的功率，PDME的相对时延以及发生器的光子集成电路（PIC）副本，进一步研究了该系统的实际可行性。消除了色散引起的功率衰减。通过仿真研究了该方法。演示了具有4 Gbit / s重复率的多相编码信号。然后执行带宽为8 GHz的双线性调频信号。此外，通过分析BOS的功率，PDME的相对时延以及发生器的光子集成电路（PIC）副本，进一步研究了该系统的实际可行性。消除了色散引起的功率衰减。通过仿真研究了该方法。演示了具有4 Gbit / s重复率的多相编码信号。然后执行带宽为8 GHz的双线性调频信号。此外，通过分析BOS的功率，PDME的相对时延以及发生器的光子集成电路（PIC）副本，进一步研究了该系统的实际可行性。