A comprehensive design approach for a MZM based PAM-4 silicon photonic transmitter
A comprehensive design approach for a MZM based PAM-4 silicon photonic transmitter
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基于 MZM 的 PAM-4 硅光子发射器的综合设计方法
DOI：
10.1109/mwscas.2015.7282203
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Xinyu Wu
中科院分区：
文献类型：
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作者：
Kehan Zhu;V. Saxena;Xinyu Wu
采用电-光协同设计方法，设计了一种工作速率为25 Gb/s的四电平脉冲幅度调制（PAM-4）硅光子发射机。该原型包括一个电子电路和一个光子学电路，分别采用130 nm IBM SiGe BiCMOS工艺和130 nm IME SOI CMOS工艺设计。然后，这两个部分将通过并排引线键合连接。电路主要包括12.5GHz锁相环、全速率4通道非相关27 - 1伪随机二进制序列发生器和CML驱动器。光子管芯是具有PAM-4的热调谐特征的2段马赫-曾德尔调制器（MZM）硅光子器件。Verilog-MZM的A模型需要使用定制IC设计工具对光学器件和电路进行系统仿真。详细介绍了一种采用转移矩阵法的全速率4通道不相关伪随机码的设计，其中任意两个通道可用于提供随机二进制序列，驱动两段MZM产生PAM-4信号。
A 4-level pulse amplitude modulation (PAM-4) silicon photonic transmitter targeting operation at 25 Gb/s is designed using an electrical-photonic co-design methodology. The prototype consists of an electrical circuit and a photonics circuit, which were designed in 130 nm IBM SiGe BiCMOS process and 130nm IME SOI CMOS process, respectively. Then the two parts will be interfaced via side-by-side wire bonding. The electrical die mainly includes a 12.5 GHz PLL, a full-rate 4-channel uncorrelated 27 - 1 pseudo-random binary sequence (PRBS) generator and CML drivers. The photonics die is a 2-segment Mach-Zehnder modulator (MZM) silicon photonics device with thermal tuning feature for PAM-4. Verilog-A model for the MZM entails the system simulation for optical devices together with electrical circuitry using custom IC design tools. A full-rate 4-channel uncorrelated PRBS design using transition matrix method is detailed, in which any two of the 4-channels can be used for providing random binary sequence to drive the two segments of the MZM to generate the PAM-4 signal.