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AssigneeAlphion Corporation
InventorsBharat Dave, Doruk Engin, Kwang Kim, Mohammad Laham, Julio Martinez, Olga Nedzhvetskaya, Jithamithra Sarathy, Ronald Simprini, Boris Stefanov, Tan Buu Thai
Estimating the term…
A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.
A method of extracting the line rate clock from an optical data signal of unknown bit rate or format, comprising:
A method of retiming an optical data signal comprising:
An optical circuit, comprising:
A method of restricting the RF spectrum of an optical data signal to effectively that of the dominant frequency, comprising:
The method of claim 28, where the semiconductor optical amplifier is the device of claim 32.
A semiconductor device comprising:
Dependencies are inferred from the claim text.