Unlock instant, AI-driven research and patent intelligence for your innovation.

A coherent optical module and its monitoring method

A coherent optical, adaptive equalization technology, applied in the field of optical communication, can solve problems such as time affecting service recovery, performance degradation of optical modules, service interruption, etc., to achieve the effect of increasing stability, avoiding obvious degradation, and reducing the probability of performance degradation

Active Publication Date: 2022-04-26
FENGHUO COMM SCI & TECH CO LTD
View PDF20 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of these dynamic adjustments, due to changes in the optical path, mainly including changes in wavelength, optical power, polarization state, and dispersion, the coherent The adaptive equalizer in the DSP (Digital Signal Processing, digital signal processing) chip of the optical module usually cannot work in the best state, causing the performance of the optical module to deteriorate. In severe cases, the adaptive equalizer of the coherent optical module may also have singularity. cause business interruption
The traditional method resets the relevant functional units of the DSP chip once or multiple times in a row, but it does not necessarily guarantee to solve the problem, and multiple resets will affect the time for business recovery

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A coherent optical module and its monitoring method
  • A coherent optical module and its monitoring method
  • A coherent optical module and its monitoring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] refer to figure 1 , this embodiment provides a monitoring method for a coherent optical module, the monitoring method comprising:

[0054] Step 101: If it is detected that the coherent optical module has a characteristic operation, wait for the optical path to stabilize, and then detect the residual error and the maximum tap increment of the adaptive equalizer to identify the coherent optical module after the characteristic operation There are potential anomalies in performance.

[0055] Wherein, the characteristic operation includes operations such as wavelength switching and protection switching.

[0056] In this embodiment, it is determined whether the coherent optical module has a characteristic operation by detecting the change of the optical power. If it is detected that the coherent optical module has a characteristic operation, continue to detect the change of the optical power to determine whether the optical path of the coherent optical module is restored to ...

Embodiment 2

[0131] refer to Figure 4 , this embodiment also proposes a coherent optical module, which includes: a coherent optical front end 1 , a coherent DSP chip 2 and a controller 3 .

[0132] Among them, the coherent optical front end is connected to the external optical module through the optical fiber interface to realize the transmission and reception of optical signals; the coherent DSP chip is connected to the logic circuit of the external optical module through a high-speed electrical signal interface to realize the transmission and reception of electrical signals; the coherent DSP chip The high-speed electrical signal interface is connected to the coherent optical front end to realize the modulation and detection of the baseband electrical signal.

[0133] The controller is connected with the coherent optical front-end for reading the size of the received optical power; the controller is also connected with the coherent DSP chip for reading the tap coefficient and residual er...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a coherent optical module and a monitoring method thereof. The monitoring method includes: if it is detected that a characteristic operation of the coherent optical module occurs, waiting for the optical path to restore stability, and then adjusting the residual error and the maximum tap increment of the adaptive equalizer Perform detection to identify whether there is a potential abnormality in the performance of the coherent optical module after the characteristic operation; if there is a potential abnormality, reset the adaptive equalizer of the coherent optical module by combining random perturbation of the polarization state and channel matching filtering; Continuously read the tap coefficient values ​​of the adaptive equalizer N times, and determine whether the performance of the coherent optical module is degraded according to the tap coefficient values ​​read N times; determine whether the optical module can return to normal through a given number of resets. In the present invention, through an appropriate control flow, the software repairs the change of the optical path to cause the adaptive equalizer to enter a non-global optimal convergence state, avoiding obvious degradation of performance and increasing the stability of the optical module.

Description

technical field [0001] The invention belongs to the field of optical communication, and more specifically relates to a coherent optical module and a monitoring method thereof. Background technique [0002] With the advancement of 5G new infrastructure and the digital transformation of the economy and society, the number of Internet users and Internet of Things connections will continue to grow, and the demand for traffic will continue to grow rapidly. As the cornerstone of the information superhighway, the optical fiber communication network will undoubtedly play a pivotal role. At present, in the field of optical transmission, single-wavelength 100G coherent optical modules have been widely commercialized, 200G coherent optical modules are about to be deployed on a large scale, and 400G coherent optical modules are about to lead the trend of technological innovation in the data center optical interconnect (DCI) scenario. Compared with the traditional intensity modulation d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/079H04B10/61
CPCH04B10/0795H04B10/61
Inventor 冯振华韩恩钊
Owner FENGHUO COMM SCI & TECH CO LTD