Low-voltage linear silicon optical modulator with a single-drive parallel-push-pull scheme
Low-voltage linear silicon optical modulator with a single-drive parallel-push-pull scheme
复制标题
单驱动并行推挽方案的低压线性硅光调制器
DOI：
10.1016/j.optcom.2017.09.025
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发表时间：
2018
影响因子：
2.4
通讯作者：
Yang Lin
中科院分区：
文献类型：
--
作者：
Shao Sizhu;Ding Jianfeng;Zhang Lei;Fu Xin;Yang Lin
我们展示了一个单驱动并行推挽硅光调制器。与串联推挽方案相比，并联推挽方案允许驱动信号被施加在两个臂上而不分开。这使得该器件适用于低压驱动。由于电极同时驱动两个PN结，我们周期性地掺杂波导以降低负载PN结的单位长度电容。这种设计可以减轻共面波导电极的匹配要求。当光偏置在正交点时，在1.8Vpp的驱动电压和20 Gbps的速率下，器件的消光比为3.1dB。得益于推挽电路，其线性度也得到了改善。与采用该方案的单臂驱动器件相比，二阶谐波失真和三阶互调失真的无杂散动态范围分别提高了11.5dB和2dB ~ 101 dB。Hz 1闪烁2和113 dB。Hz 2 scin3。
We demonstrate a single-drive parallel-push–pull silicon optical modulator. Compared with the serial-push–pull scheme, the parallel-push–pull scheme allows the driving signal to be applied on both the arms without division. It makes the device suitable for low-voltage driving. Since the electrode drives two PN junctions at the same time, we dope the waveguides periodically in order to lower the capacitance per unit length of the loaded PN junction. This design could alleviate the matching requirement of the coplanar waveguide electrode. When optically biased at the quadrature point, the device has an extinction ratio of 3.1 dB at the speed of 20 Gbps and under the driving voltage of 1.8 Vpp. Benefitting from the push–pull scheme, its linearity performance is also improved. Compared with the device adopting the scheme with only one arm being driven, the spurious free dynamic ranges for second-order harmonic distortion and third-order intermodulation distortion increase by 11.5 dB and 2 dB to 101 dB. Hz 1∕ 2 and 113 dB. Hz 2∕ 3, respectively.