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US 2014/0178071 A1Published application
Generation of polarization-alternated qpsk format
AssigneeNEC Laboratories America, Inc.
InventorsShaoliang ZHANG, Fatih YAMAN, Ting WANG, Yoshihisa INADA, Takaaki OGATA, Yahuhiro AOKI
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Abstract
Methods, structures and systems for generating different polarization multiplexed signals wherein the drivers of the modulators are generic while a software-controlled manager allows the carrying of any standard 10 G/40 G/100 G data while—at the same time—being adaptively adjustable according to specific link requirements and users' requests in both dispersion-managed and uncompensated links.
Claims7
A flexible-bit-rate optical DP-QPSK transmitter comprising:
- a client interface framing module for receiving an input data signal;
- a binary bit encoder module operable to generate different polarization multiplexed signals;
- an adaptive FEC encoder module;
- a multi-tone generation & DeMux module including an RF clock, a Multi-tone generator and a programmable wavelength selective switch;
- a number of modulators for modulating the FEC encoded signals onto the number of subcarriers produced by the multi-tone generation and demux modulator module;
- a combiner for combining the modulated signals into an output signal;
- and
- a control manager module operable to determine and set bit encoding parameters, the number of subcarriers produced by the multi-tone generation & demux module and FEC coding rate such that the output signal is one selected from standard 10 G, 40 G, and 100 G data.
5 more elements
Dependencies are inferred from the claim text.