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Optical transmission with polarization division multiplexing

A polarization and optical signal technology, applied in the field of optical packet or optical burst transmission, which can solve problems such as large bandwidth consumption

Active Publication Date: 2013-11-13
WSOU INVESTMENTS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Repeating the normal convergence process for every packet would consume a lot of bandwidth

Method used

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  • Optical transmission with polarization division multiplexing
  • Optical transmission with polarization division multiplexing
  • Optical transmission with polarization division multiplexing

Examples

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Embodiment Construction

[0048] refer to figure 1 , an optical transmitter suitable for generating a PDM optical signal is schematically shown. The transmitter 1 comprises a laser source 2 for generating an optical carrier at a selected wavelength suitable for WDM transmission. The beam splitter 3 splits the optical carrier into two carrier components propagating in respective waveguides 4 and 5 . A respective optical modulator 6 and 7 is arranged on each of the waveguides 4 and 5 to impart modulation on a corresponding carrier component according to a respective baseband signal 11 and 12 which is supplied by a baseband signal generator in the form of generated at the same data rate. The light modulators 6 and 7 can be any type of modulator. In a preferred embodiment, the optical modulators 6 and 7 are MZ modulator arrangements adapted to generate PSK modulation, eg binary phase shift keying or quaternary phase shift keying. Such arrangements are known in the art. In particular, the baseband sign...

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Abstract

A method for transmitting digital data on an optical channel, comprises: generating first and second baseband digital signals (11, 12), modulating a first polarized optical carrier wave component in accordance with the first baseband digital signal, modulating a second polarized optical carrier wave component in accordance with the second baseband digital signal, wherein the second polarized optical carrier wave component has an orthogonal polarization to the first polarized optical carrier wave component and combining the first and second modulated optical carrier wave components into a propagation medium (9), wherein the first and second baseband digital signals are generated in a correlated manner so that the modulated optical carrier wave components are combined as a modulated single-polarization optical carrier wave.

Description

technical field [0001] The present invention relates to the technical field of optical communication systems using polarization division multiplexing, and in particular to the transmission of optical packets or optical bursts. Background technique [0002] The combination of optical packet transmission and polarization division multiplexing (PDM) is attracting attention for the development of high data rate, highly flexible communication systems. Originally coherent receivers have been designed for optical circuit connections. The convergence time of conventional polarization demultiplexing algorithms typically requires thousands of symbols. In packet transmission, each packet has its own state of polarization (SOP). Repeating the normal convergence process for every packet would consume a lot of bandwidth. [0003] EP-A-2273700 teaches a method for accelerating the convergence of polarization demultiplexing filters in a coherent receiver adapted for optical packet recept...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/00H04J14/06
CPCH04J14/06H04J14/00
Inventor F·瓦孔迪奥C·西莫诺
Owner WSOU INVESTMENTS LLC
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