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High capacity optical data transmission using intensity-modulation and direct detection

A receiving data, the highest technology, applied in the field of optical transmission system

Active Publication Date: 2019-02-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This introduces additional redundancy and requires enhanced synchronization algorithms

Method used

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  • High capacity optical data transmission using intensity-modulation and direct detection
  • High capacity optical data transmission using intensity-modulation and direct detection
  • High capacity optical data transmission using intensity-modulation and direct detection

Examples

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Embodiment Construction

[0076] image 3 Shown is a multi-channel IM-DD transceiver 300 according to a first embodiment of the present invention, which includes a multi-channel transmitter 300-Tx and a multi-channel receiver 300-Rx.

[0077] The multi-channel transmitter 300-Tx includes N channels (numbered from 1 to N) with different or equal bit rates, which are multiplexed into M channels (numbered from 1 to M) by a multiplexer (MUX). ), which may not have the same bitrate. Each of the M channels includes a forward error correction (FEC) device, a digital signal processing (DSP) device, a digital-to-analog converter (DAC), a modulator driver (MD) and an optical modulator (MOD), respectively.

[0078] The channel with the highest baud rate (fBmax) among the M channels is denoted as the main channel, which corresponds to channel 1 in our exemplary first embodiment, and has a baud rate (fBi) equal to or lower than fBmax The remaining channels are denoted as slave channels. The baud rate fBi of the ...

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Abstract

The present invention relates to a multi-channel IM-DD optical transceiver comprising at least one transmitter and a receiver, and a method for equalizing input samples at an adjusted sampling phase using a quality parameter linearly proportional to a BER. The data transmission and reception use a single master channel and slave channels, which have a baud rate equal to or lower than the baud rateof the master channel. A reliable and identical clocking of all the channels is obtained through either the receiver clock of the master channel when they are received from a single transmitter or areference clock whose frequency is higher than the highest clock frequency amongst all the channels when they are received from a combination of transmitters. An enhanced timing recovery circuit is also provided to select optimized finite impulse response filters, calculate filter coefficients and generate the receiver clock of the master channel. Each channel of the receiver comprises a timing recovery circuit adapted to control a sampling phase of an interpolator.

Description

technical field [0001] The invention relates to the field of optical transmission systems, in particular to an intensity modulation and direct detection optical receiver. Background technique [0002] Due to advances in the design of optical and electronic components, the capacity of optical links has increased significantly. Using a complex modulation format (principal states of polarization and coherent detection), it is possible to transmit 100Gb / s data over long-distance optical networks with a length of more than 2000km in commercial applications. Compared with traditional non-coherent 10Gb / s transmission, it can increase the flow rate by ten times. But in turn, coherent systems use more expensive equipment and advanced signal processing, which also leads to increased power consumption. However, as large-scale component production has become more mature, the price of 100G coherent transponders has dropped to such an extent that using one 100G transponder is today more...

Claims

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Application Information

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IPC IPC(8): H04B10/69H04J14/02H04L7/00
CPCH04B10/69H04B10/697H04J14/02H04J14/0224H04L7/0029H04L7/005H04B10/54H04B10/61H04L1/0045H04L7/0075H04L25/03885
Inventor 内博伊沙·斯托亚诺维奇解长松
Owner HUAWEI TECH CO LTD