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Spectral inversion detection for polarization-division multiplexed optical transmission

一种偏分复用、检测器的技术，应用在偏振复用系统、传输系统、电磁波传输系统等方向，能够解决需要等问题

Active Publication Date: 2017-08-01
XIEON NETWORKS SARL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This possible approach would therefore require a back channel from the receiver to the transmitter and thus suffer from bootstrapping difficulties

Method used

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  • Spectral inversion detection for polarization-division multiplexed optical transmission
  • Spectral inversion detection for polarization-division multiplexed optical transmission
  • Spectral inversion detection for polarization-division multiplexed optical transmission

Examples

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Embodiment Construction

[0049] For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the preferred embodiments illustrated in the drawings and specific language will be used to describe the same. It should be understood, however, that no limitation of the scope of the invention is thereby intended to cover such alterations and further modifications in the described devices and Further application of the principles of the invention as explained herein.

[0050] image 3 A transmitter 46 according to an embodiment of the invention is shown. The transmitter includes a laser 48 , a modulator 50 and a control unit 52 . The modulator 50 has an figure 1 The prior art modulators of ® are generally similar in structure and also include first and second DP-MZMs 12 , 28 as well as a TE / TM polarization conversion unit 42 and a polarization beam splitter 44 . image 3 Similar components of the modulator 50 are used with the figure 1 are denoted by th...

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Abstract

Disclosed herein is a modulator (50) for polarization-division multiplexing (PDM) transmission. The modulator (50) comprises first and second DP-MZMs (12, 28) associated with first and second polarizations, each DP-MZM (12, 28) having an input for an in-phase and a quadrature driving signal for modulating the in-phase and quadrature components of an optical signal according to respective transfer functions, and a detector (58) suitable for detecting light comprising at least a portion of the light outputted by the first DP-MZM (12) and a portion of the light outputted by the second DP-MZM (28). The modulator (50) is adapted to superimpose a first pilot signal on one of the in-phase and quadrature driving signals of the first DP-MZM (12) and on one of the in-phase and quadrature driving signals of the second DP-MZM (28), and a second pilot signal on the respective other of the in-phase and quadrature driving signals of the first and second DP-MZMs (12, 28). Further, the first and second pilot signals are chosen such that the signal detected by said detector (58) is indicative as to whether the slopes of the transfer functions are different for the in-phase and quadrature components of one of the first and second DP-MZMs (12, 28) and identical for the other of the first and second DP-MZMs (12, 28).

Description

technical field [0001] The present invention belongs to the field of optical data transmission technology. More particularly, the present invention relates to a modulator for polarization division multiplexing (PDM) transmission, an optical transmitter comprising the modulator and a method for controlling the optical transmitter. Background technique [0002] exist figure 1 In , the structure of a conventional modulator 10 for a polarization division multiplexed (PDM) signal is shown. figure 1 The modulator 10 is designed for PDM quadrature amplitude modulation (QAM). The modulator 10 comprises a first dual parallel Mach-Zehnder modulator (DP-MZM) 12 comprising: an input 14 for inputting an optical carrier; and an output 16 for outputting A QAM modulated signal associated with a first polarization (hereinafter referred to as the "H polarization" component). Downstream of the light input end 14, the DP-MZM 12 branches accordingly into a first arm 18 and a second arm 20, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/532G02F1/01
CPCG02F1/0123H04B10/505H04B10/532H04B10/5053H04B10/50572G02F1/2255G02F1/212G02F2201/58G02F2203/07H04J14/06
Inventor 斯特凡诺·卡拉布罗伯恩哈德·施平纳勒
Owner XIEON NETWORKS SARL
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