Patent ID: 11942993
Assignee: MOLEX, LLC
Field: Telecommunications (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 9:
10. An optical communication system, comprising:
an optical transmission device, comprising
a control module which is used to receive an input signal indicating a dispersion amount and a measuring signal, and generate a control signal output comprising a slope adjust signal and a bias voltage offset adjust signal according to the input signal and the measuring signal, the slope adjust signal and the bias voltage offset adjust signal respectively changing as a polarity and a magnitude of the dispersion amount changing;
a multi-level pulse amplitude modulator which is used to receive a data input, and modulates the data input to generate a multi-level pulse amplitude modulation signal; and
an asymmetrical optical modulator which is used to receive an optical signal, and connects the multi-level pulse amplitude modulator and the control module to respectively receive the multi-level pulse amplitude modulation signal and the control signal output, the asymmetrical optical modulator being controlled by the slope adjust signal of the control signal output to be operated at one of a positive slope and a negative slope of a transfer function of the asymmetrical optical modulator itself, and being controlled by the bias voltage offset adjust signal of the control signal output to offset a bias voltage point of the asymmetrical optical modulator itself from a quadrature point of the transfer function, and modulating the multi-level pulse amplitude modulation signal to the optical signal to generate an optical modulate signal having a chirp, a polarity and a magnitude of the chirp respectively changing as the slope adjust signal and the bias voltage offset adjust signal changing;

an optical amplifier which connects the asymmetrical optical modulator via an optical fiber to receive the optical modulate signal, and amplifies the optical modulate signal, to generate an optical amplified signal;
an optical receiving device which connects the optical amplifier to receive the optical amplified signal, and generate a data output according to the optical amplified signal; and
a detector which connects the optical receiving device and the control module, and generates the measuring signal according to the data output and outputs the measuring signal to the control module, the measuring signal indicating one of a Bit Error Rate, a Forward Error Coding and a signal-to-noise ratio of the data output.