We have proposed and successfully simulated a general design concept of an 8PSK generator using a silicon microring modulator. Usually, quadrature phase-shift keying (QPSK) is generated using in-phase/quadrature modulator in balanced condition or in un-balanced condition showing a square-shape and rectangular-shape constellation mapping in complex plane, respectively. By introducing 8 dB loss in the Q-arm of the first QPSK modulator, an unbalanced QPSK modulator has been generated. Thereby cascading both the QPSK modulators, an optical 8PSK has been synthesized.

中文翻译：

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通过使用微环调制器级联平方和矩形QPSK产生光学8PSK

我们已经提出并成功地模拟了使用硅微环调制器的8PSK发生器的一般设计概念。通常，使用相/正交调制器在平衡状态或不平衡状态下生成正交相移键控（QPSK），分别显示复杂平面中的正方形和矩形星座映射。通过在第一个QPSK调制器的Q臂中引入8 dB损耗，已生成了不平衡的QPSK调制器。通过级联这两个QPSK调制器，已经合成了光学8PSK。