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Device for improving stability of light source

A technology of stability and light source, applied in the field of optical communication, can solve problems such as the influence of light source stability, restricting the stability of the output optical power of the light source, etc., to achieve the effect of simple structure, easy operation and reduced influence

Inactive Publication Date: 2014-03-12
GUILIN G LINK TECH
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Problems solved by technology

However, the external terminal connected to the output end of the light source is often changed, and the connection status is also changed accordingly, so the reflection value and polarization state are also changed. If the optical signal output by the output end of the light source returns to the laser after external reflection, the stability of the light source degree of influence, which restricts the improvement of the stability of the output light power of the light source

Method used

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  • Device for improving stability of light source

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Embodiment Construction

[0010] refer to figure 1 , a device for improving the stability of the light source, consisting of a laser drive circuit 1, an optical isolator 3, a 1×2 optical splitter 4, a photodetector 5 and a photoelectric amplifier 6 connected in sequence, the laser drive circuit 1 and the laser 2 connection, the optical isolator 4 is connected between the laser 2 and the 1×2 optical splitter 3, and is used to isolate the reflected light at the end of the optical path, so that the end of the optical path cannot reflect the output optical signal of the laser 2 back into the laser 2 again, thereby improving The stability of the output light power of the light source.

[0011] When working, the output optical signal of the laser 2 of the laser drive circuit 1 enters the 1×2 optical splitter 4 through the optical isolator 3, and a part of the optical signal is output from one port of the 1×2 optical splitter 4 to the output port of the light source The other part of the optical signal is ou...

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Abstract

The invention discloses a device for improving the stability of a light source. The device comprises a laser, a 1*2 optical branching device and an optic amplifier and is characterized in that an optoisolator is arranged between the laser and the 1*2 optical branching device. According to the device, the optoisolator is used in the light source to enable that an optical signal reflected back from the output end of the light source does not enter the laser, and the influences of the refection and polarization changes of an external terminal of the light source output end on the stability of the light source are reduced, so that the stability of the light source is improved, the structure is simple, and the operation is simple and convenient.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a device for improving the stability of a light source. Background technique [0002] The current stable light source adopts automatic optical power control technology and automatic temperature control technology to improve the stability of the output optical power of the light source. The automatic optical power control technology relies on the photodetector to detect the output optical power of the laser, and then controls the stability of the output optical power through a negative feedback circuit. The automatic temperature control technology is to use the temperature control circuit to keep the working temperature of the laser at about a set value, and reduce the influence of temperature on the laser to improve the stability of the output optical power. However, the external terminal connected to the output end of the light source is often changed, and the connection st...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H01S3/10
Inventor 莫斌刘文俊
Owner GUILIN G LINK TECH