Patent ID: 7623798
Filing Date: 2009-11-24
Classification: H04B

Abstract:
1. An optical transmitter for an optical communication system, comprising: a first optical delay element configured to generate a third optical signal from a first optical signal; a second optical delay element configured to generate a fourth optical signal from a second optical signal; an optical multiplexer configured to combine the third and fourth optical signals to produce a fifth optical signal; an optical modulator configured to alter a pulse width of the fifth optical signal to generate a sixth optical signal; and an optical delay controller configured to control the first optical delay element and the second optical delay element to synchronize the third and fourth optical signals with each other based on the sixth optical signal, wherein the synchronization aligns pulses of the third and fourth optical signals with each other in time; wherein the optical delay controller comprises a spectrum analyzer configured to determine a power over time of a first optical channel signal associated with the first optical signal and a power over time of a second optical channel signal associated with the second optical signal, wherein the sixth optical signal comprises the first optical channel signal and the second optical channel signal; and wherein the optical delay controller adjusts the first optical delay element and the second optical delay element such that a maximum of the power of the first optical channel signal and a maximum of the power of the second optical channel signal are synchronized.