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Laser dense wavelength division multiplexing method and device for stable wavelength control

A dense wavelength division multiplexing and wavelength control technology, which is applied in the field of optical communication and can solve the problem of not being able to control the wavelength of the laser of the DWDM optical module quickly, stably and reliably.

Active Publication Date: 2020-06-02
SONT TECH (SHEN ZHEN) LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of this application is to provide a method and device for stable wavelength control of dense wavelength division multiplexing of lasers, to solve the technical problem that there is no rapid, stable and reliable control of the wavelength of lasers in DWDM optical modules in the prior art

Method used

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  • Laser dense wavelength division multiplexing method and device for stable wavelength control
  • Laser dense wavelength division multiplexing method and device for stable wavelength control
  • Laser dense wavelength division multiplexing method and device for stable wavelength control

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Embodiment

[0069] Such as figure 1 As shown, it is a schematic flowchart of a method for dense wavelength division multiplexing and stable wavelength control of lasers in this embodiment. The method involves: the laser EML closed-loop control circuit in the optical module, and the temperature stabilization control of the semiconductor refrigerator TEC of the laser. The embodiment of the present invention adopts a precise control method, which can effectively reduce the wavelength drift when the laser is cold-started, and is a good control method for solving optical crosstalk between DWDM channels in dense light-wave multiplexing DWDM optical modules. Specifically, the method includes the following steps:

[0070] Step 101, set the set voltage value of the refrigerator controller through the laser controller, and the laser controller monitors the output voltage value of the refrigerator controller under the set voltage value in real time, and obtains the correspondence between the set vo...

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Abstract

The invention provides a laser dense wavelength division multiplexing stable wavelength control method. The method comprises the following steps of obtaining a corresponding relation between a set voltage value and an output voltage value, a corresponding relation between the set voltage value and a set corresponding temperature, and a corresponding relation between the set voltage value and a monitored temperature; obtaining a monitored temperature threshold range, and a target set temperature value, the upper limit hysteresis temperature and the lower limit hysteresis temperature of a refrigerator controller; obtaining a target set voltage value and a target output voltage value, and outputting the target output voltage value to the refrigerator; and detecting the real-time temperature of the laser during working in real time, wherein when the real-time temperature is within the hysteresis temperature ranges, the laser is started. According to the method, the working wavelength of the laser is offset within + / -0.02 nm, and the problem of light crosstalk between the DWDM channels is effectively solved.

Description

technical field [0001] The present application relates to the technical field of optical communication technology, in particular to a method and device for dense wavelength division multiplexing and stable wavelength control of lasers. Background technique [0002] Optical fiber is an important transmission tool for information in today's information age. Optical fiber is a fiber that can transmit light waves and various optical signals. In today's information age, people have a large amount of information and data to process and process in economic activities and scientific research, and optical fiber is the most ideal tool for transmitting information. Compared with the traditional cable system, the information system based on optical communication technology can transmit a larger amount and more types of information in the same amount of time. One fiber optic cable carries as much information as 100 coaxial cables used in telephones. Moreover, the loss during transmissi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/13
CPCH01S3/1305
Inventor 许国威蓝海涛黄伟毅
Owner SONT TECH (SHEN ZHEN) LTD
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