Patent ID: 7480465

Claim:
A component for an optical differential phase modulated signal in a telecommunication network, comprising: a first splitter that divides the signal into first, second, and third signal components; a first signal path that routes the first signal component from the first splitter to a second splitter, the second splitter that divides the first signal component into two equal-size component parts; a second signal path that routes the second signal component from the first splitter; a third signal path that routes the third signal component from the first splitter; a first combiner having a first input that receives the first equal-size component part and having a second input that receives the second signal from the second signal path, the first combiner that combines the inputs to form a first optical signal; a second combiner having a first input that receives the second equal-size component part and having a second input that receives the third signal from the third signal path, the second combiner that combines the inputs to form a second optical signal; a first timer that has a delay of a half period of a carrier signal and connects to the first signal path; and an adjustable timer connects to the second signal path.