Optical communications – Transmitter and receiver system – Including polarization
Reexamination Certificate
2008-07-10
2011-11-29
Bello, Agustin (Department: 2613)
Optical communications
Transmitter and receiver system
Including polarization
C398S141000, C398S139000, C398S184000, C398S205000
Reexamination Certificate
active
08068742
ABSTRACT:
A high-speed optical transmitter comprises multiple digital lanes that are provided to a bank of digital-to-analog converters. The analog signals are then used to Phase Shift Keyed (PSK) modulation using a Chirp Managed Laser (CML)-based transmitter, and potentially using dual polarization. A corresponding optical receiver receives the sequence of optical signals at a demodulator. For each polarization, the demodulator includes a corresponding demodulation channel that is configured to demodulate that polarization component of the optical signal into one or more signal components. Each of these signal components is converted into a corresponding digital signal using a corresponding analog-to-digital converter. In the case of higher-order PSK modulation (e.g., 8PSK or higher), for each polarization, the analog converter has a lower sampling rate than for QPSK modulation.
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Cole Christopher R.
Mahgerefteh Daniel
Nguyen The'Linh
Shanbhag Naresh Ramnath
Singer Andrew C.
Bello Agustin
Finisar Corporation
Maschoff Gilmore & Israelsen
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