Carrier-signal Power Ratio Control in Direct Detection Optical Systems

A network component configured for carrier-signal power ratio (CSPR) control in a direct detection optical system, the network component comprising:

• a processor;
• and
• a computer readable storage medium storing programming for execution by the processor, the programming including instructions to:
• receive an electrical signal, wherein the electrical signal is obtained from a corresponding optical signal via a direct detection component;
• estimate a CSPR for the electrical signal;
• generate a control signal according to the CSPR;
• and
• transmit the control signal to a first optical element, wherein the control signal causes a center wavelength (CW) of the first optical element to be adjusted such that an offset between the CW of the first optical element and the CW of a second optical element results in a desired CSPR.

A direct detected optical transmission system, comprising:

• a laser;
• an optical filter in a signal path of an optical output from the laser;
• and
• a controller communicably coupled to at least one of the laser and the optical filter, wherein the processor is configured to estimate a carrier-signal power ratio (CSPR) in the direct detected optical transmission system, wherein the processor is further configured to generate a control signal according to the CSPR, wherein the processor is further configured to send the control signal to one of the laser and the optical filter, and wherein the control signal causes a center wavelength (CW) of one of the optical filter and the laser to be adjusted such that an offset between the CW of the optical filter and the CW of the laser results in a desired CSPR in a transmitted optical signal.