ID 原文 译文
41426 四级脉冲幅度调制(PAM4)在高速串行链路系统中的地位日益提高，受到越来越多的关注。 Four-level pulse amplitude modulation(PAM4)plays a more and more important role in high-speed serial link systems and receives more and more attention.
41427 传统的行波马赫-曾德尔调制器(TWMZM)的分光比为1∶1， The traditional traveling wave Mach-Zehnder modulator(TWMZM)has a spectral ratio of 1∶1.
41428 文章提出了一种非对称光强的行波马赫-曾德尔调制器(Asymmetric Power TWMZM，AP-TWMZM)， In this paper, a traveling wave Mach-Zehnder modulator with asymmetric light intensity(AP-TWMZM)is proposed.
41429 并对输入端分光比进行独立推算，得到分光比的值为4∶1。 Its optical power spectral ratio at the input side is 4∶1.The PAM4 optical signal is generated by the upper and lower arms modulation to realize the optical domain PAM4 modulation.
41430 Lumerical软件的建模仿真结果表明，在插入损耗和消光比与TWMZM相当的情况下，AP-TWMZM具有更高的调制效率和更好的线性度，其线性度高达0.948。 Modeling and simulation with the Lumerical software shows that compared with traditional TWMZM, AP-TWMZM has higher modulation efficiency and its linearity is as high as0.948.
41431 为满足激光通信系统跟踪精度的要求，采用快速反射镜系统作为精跟踪控制核心。选用大行程、高分辨率、高带宽的音圈电机驱动快速反射镜，对音圈电机控制方法进行了研究。 In order to meet the tracking accuracy requirements of the laser communication system, a fast steering mirror system is used as the core of fine tracking control, and a voice coil motor with large stroke, high resolution and high bandwidth is selected to drive the fast steering mirror, and the control method of voice coil motor is studied.
41432 首先，定性分析了快速反射镜系统的组成及工作原理。 Firstly, the composition and working principle of the fast steering mirror system is analyzed.
41433 然后，根据音圈电机的等效电路模型进行建模分析，得到快速反射镜的传递函数模型。 Then, modeling analysis is performed according to the equivalent circuit model of the voice coil motor, and the transfer function model of the fast reflector is obtained.
41434 最后，介绍了模拟控制器的设计原理，给出了比例-积分-微分(Proportional-Integral-Derivative，PID)电路、位置检测电路以及功率放大电路的具体设计。 Finally, the design principle of the analog controller, the proportional-integral-derivative(PID)circuit, the position detection circuit and the power amplifier circuit are introduced.
41435 实验结果表明，设计的快速反射镜的角分辨率为1μrad，重复定位精度为3μrad，闭环带宽(-3dB)为300Hz@1mrad，满足激光通信系统稳定可靠、精度高、抗干扰能力强等要求。 The experimental results show that the angular resolution of the fast steering mirror is 1μrad, the repeated positioning accuracy is 3μrad, and the closed-loop bandwidth(-3 dB)is 300 Hz@1 mrad, which can meet the requirements of laser communication system for stability, reliability, high precision, and strong anti-interference ability.