Patent ID: 11971323
Assignee: CIENA CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A transmitter apparatus comprising:
circuitry configured to generate a first electrical signal comprising a first pulse sequence including a first low-frequency signal, an empty period, and a pump pulse having a first frequency;
circuitry configured to generate a second electrical signal comprising a second pulse sequence including a second low-frequency signal and at least two probe pulses, each probe pulse having a second frequency that differs from the first frequency;
circuitry configured to modulate a first optical subcarrier using the first electrical signal;
circuitry configured to modulate a second optical subcarrier using the second electrical signal, the second optical subcarrier having a different polarization than the first optical subcarrier; and
circuitry configured to generate, from the first and second optical subcarriers, an optical signal for transmission over an optical link, wherein the first and second low-frequency signals overlap in time, wherein the empty period overlaps in time with one of the probe pulses, and wherein the pump pulse overlaps in time with another one of the probe pulses.