Patent ID: 11888529
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. The coherent transceiver system according to claim 13, wherein the coherent transmitter further comprises:
a second signal modulator, wherein the first signal modulator and the second signal modulator have a same structure, wherein the second signal modulator is configured to output a third combined signal and a fourth combined signal based on a fourth optical signal, and wherein polarization modes of the second combined signal and the third combined signal are transverse electric (TE) polarization;
a second beam splitter coupled to the light source, the first signal modulator and the second signal modulator, wherein the second beam splitter is configured to:
split the optical signal to obtain the first optical signal and the fourth optical signal;
transmit the first optical signal to the first signal modulator; and
transmit the fourth optical signal to the second signal modulator;

a second PD coupled to the second signal modulator and the controller, wherein the second PD is configured to perform optical-to-electrical conversion on the fourth combined signal to obtain a second electrical signal; and
a polarization converter coupled to the first signal modulator and the second signal modulator, wherein the polarization converter is configured to:
combine the second combined signal and the third combined signal to obtain a fifth combined signal; and
convert a polarization mode of the second combined signal or the third combined signal into transverse magnetic (TM) polarization,

wherein the controller is configured to control, based on the second electrical signal, a second voltage applied to a second phase shift adjuster of the second signal modulator.