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Control method for modulating output optical power of laser

A control method and modulator technology, applied in the field of lasers, can solve the problems of reducing the output optical power, increasing the absorbance, affecting the normal use of the modulated laser, etc., and achieving the effect of ensuring normal use and constant output optical power

Active Publication Date: 2019-07-30
O NET COMM (SHENZHEN) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the environment changes, the refraction effect will slightly change, resulting in an increase in absorbance, thus reducing the output optical power, which will affect the normal use of the modulated laser

Method used

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  • Control method for modulating output optical power of laser
  • Control method for modulating output optical power of laser
  • Control method for modulating output optical power of laser

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Embodiment Construction

[0038] Now in conjunction with the accompanying drawings, the preferred embodiments of the present invention will be described in detail.

[0039] Such as figure 1 and figure 2 As shown, the present invention provides a preferred embodiment of a control method for modulating the output optical power of a laser.

[0040] A control method for modulating the output optical power of a laser, comprising the steps of:

[0041] S11. Acquiring the initial current value of the modulator;

[0042] S12. Obtain the current value of the modulator in the current state;

[0043] S13. Calculating and obtaining the next target current value according to the current value of the modulator in the current state and its changing speed;

[0044] S14. Regulating the modulator current to be smaller than the target current value.

[0045] Due to the aging phenomenon of the modulated laser after working for a long time, the current of the modulator will increase, resulting in a decrease in the ou...

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Abstract

The invention relates to the technical field of lasers, in particular to a control method for modulating output optical power of a laser. The control method comprises the following steps: acquiring aninitial current value of a modulator; obtaining a current value of the modulator in the current state; calculating to obtain a next target current value according to the current state regulator current value and the change speed of the regulator current value; and adjusting the current value of the modulator to be smaller than the target current value. Through acquiring the initial current valueof the modulator, the current value of the modulator in the current state and the change speed of the current value, the target current value is continuously calculated and updated, and the current value of the modulator is adjusted to be smaller than the target current value, so that the light absorption ratio of the modulated laser is kept stable, constant output light power is achieved, and normal use of the modulated laser is guaranteed.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a control method for modulating the output light power of a laser. Background technique [0002] Electro Absorption Modulator (EAM, Electro Absorption Modulator) is an optical signal modulation device made by using the exciton absorption effect in semiconductors. It is widely used in high-speed optical fiber communication because of its fast response speed and low power consumption. Signal modulation coding. [0003] The modulated laser (EML) is an integrated device of an electroabsorption modulator (EAM) and a DFB laser (LD). It is an integration of an electroabsorption modulator that uses the quantum confinement Stark effect (QCSE) and a DFB laser that uses internal grating coupling to determine the wavelength. The high-performance light source for optical communication with small size and low wavelength chirp is the general ideal light source for the information transmission c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/564
CPCH04B10/564H04B10/503
Inventor 高明來黄自宁张永铭
Owner O NET COMM (SHENZHEN) LTD