Method and apparatus for CRZ-DQPSK optical signal generation

Optical communications – Transmitter – Having particular modulation

Reexamination Certificate

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C398S183000

Reexamination Certificate

active

07346283

ABSTRACT:
Apparatus and methods for generating chirped return-to-zero (CRZ) differential quadrature phase-shift keyed (DQPSK) optical signals using a single modulator driven by synchronous return-to-zero (RZ) drive signals to achieve simultaneous RZ pulse formatting and chirped DQPSK data modulation.

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