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Feedback control system and method for controlling output light intensity of dual parallel mzm modulators

A feedback control system and feedback control technology, applied in transmission systems, electromagnetic wave transmission systems, electromagnetic transmitters, etc., can solve problems such as changes in working conditions, performance degradation, and drift of modulator output optical power, to achieve constant output power and system The best performance

Inactive Publication Date: 2016-06-29
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
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Problems solved by technology

[0004] The present invention aims to solve the problems of the dual-parallel MZM (Mach-Zehnder) modulator due to the accumulation of heat generated by long-term voltage application, which will cause the output optical power of the modulator to drift, the working state will change, and the performance will decline. Feedback control system and method for output light intensity of dual parallel MZM modulators

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  • Feedback control system and method for controlling output light intensity of dual parallel mzm modulators
  • Feedback control system and method for controlling output light intensity of dual parallel mzm modulators
  • Feedback control system and method for controlling output light intensity of dual parallel mzm modulators

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Embodiment Construction

[0024] A feedback control system to control the output light intensity of dual parallel MZM modulators, such as figure 1 As shown, it is mainly composed of fiber coupler, light receiving component, A / D converter, digital comparator, memory, microprocessor and D / A converter. The input end of the fiber coupler is connected to the output end of the dual parallel MZM modulator, the main output end of the fiber coupler outputs the normal output optical signal of the dual parallel MZM modulator, and the secondary output end outputs the monitoring optical signal of the dual parallel MZM modulator . The input end of the light receiving component is connected with the secondary output end of the fiber coupler, and the output end of the light receiving component is connected with the input end of the A / D converter. The two output terminals of the A / D converter are respectively connected to the input terminal of the digital comparator and the memory, the output terminal of the memory is...

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Abstract

The invention discloses a feedback control system and method for controlling output light intensity of a dual-parallel MZM modulator. The input end of an optical fiber coupler of the feedback control system is connected with an output end of the dual-parallel MZM modulator, the input end of an optical receiving module of the feedback control system is connected with a secondary output end of the optical fiber coupler, the output end of the optical receiving module is connected with the input end of an A / D converter, two output ends of the A / D converter are connected with one input end of a digital comparator and the input end of a memory respectively, the output end of the memory is connected with the other input end of the digital comparator, the output end of the digital comparator is connected with the input end of a microprocessor, and the output end of the microprocessor is connected with the power source end of the dual-parallel MZM modulator through a D / A converter. The feedback control system and method for controlling the output light intensity of the dual-parallel MZM modulator can carry out real-time monitoring on output optical power of the dual-parallel MZM modulator, signals are fed back to control the dual-parallel MZM modulator through the feedback control system, the output power can be constant, and system performance can be optimal.

Description

technical field [0001] The invention relates to microwave photon link technology, in particular to a feedback control system and method for controlling the output light intensity of a double-parallel MZM modulator. Background technique [0002] With the rapid development of Internet services and interactive multimedia services such as IPTV and video on demand (VOD), wireless communication systems have developed from traditional voice services to a new stage. There is an urgent need for simple, reliable and low-cost wireless communication services that can provide any media at any time and any place. With the continuous increase of users and bandwidth requirements, the available wireless spectrum resources will soon be exhausted, so broadband wireless communication technology must be extended to higher frequencies. In the optical fiber communication system, the laid optical fiber cables have not been fully utilized, and there are a large number of idle bandwidth resources. H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/54H04B10/564
Inventor 李海鸥闭斌双于宗光黄伟吴笑峰首照宇陈明陈辉李思敏姜兴陈名松
Owner GUILIN UNIV OF ELECTRONIC TECH
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