Light attenuation system

A technology of light attenuation and attenuator, which is applied in the field of light attenuation system, can solve the problems of light attenuation adjustment accuracy limitation, limited single-step attenuation adjustment accuracy, etc., and achieve the effect of high-precision light attenuation adjustment

Active Publication Date: 2007-08-15
HUAWEI TECH CO LTD
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Problems solved by technology

This scheme can ensure that the error between the adjusted attenuation amount and the specified value is within the range of the single-step attenuation adjustment amount (adjustment accuracy) of the attenuator, but this adjustment method is limited by the electronic control (mechanical or current control type). The single-step attenuation adjustment accuracy of the variable optical attenuator, so that the optical attenuation adjustment accuracy of the entire system is limited

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Embodiment Construction

[0024] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] With reference to Fig. 2, Fig. 2 is the structural representation of optical attenuation system of the present invention, comprises the following parts:

[0026] An attenuation device 20 , an input optical splitter 21 , an output optical splitter 22 , a control device 23 , an optical power detection device 24 and an optical power detection device 25 .

[0027] Generally, the optical power detection device has multiple inputs and outputs. Therefore, in practical applications, the optical power detection device 24 and the optical power detection device 25 can use the same optical power detection device.

[0028] The solid line and its arrows in Fig. 2 are the optical path and its direction, and the dotted line and its arrows are the con...

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Abstract

The light attenuation system includes input light splitter, attenuator, output light splitter, controller and at least one light power detector. The attenuator includes splitter, variable light attenuation set, and light coupler. The controller controls the attenuation amount of the variable light attenuation set based on the detection result of the light power detector. The present invention can raise the regulation precision of light attenuation.

Description

technical field [0001] The invention relates to the technical field of optical equipment, in particular to an optical attenuation system. Background technique [0002] The optical attenuator is a device that attenuates the optical power by a predetermined amount, and is divided into two types: variable optical attenuator and fixed optical attenuator. The former is mainly used to adjust the power of optical lines, and the latter is mainly used to generate fixed attenuation in optical fiber communication lines with too high optical power. The main technical requirements of optical attenuators are: high attenuation accuracy, good attenuation repeatability, and low original insertion loss. Generally, there are two types of variable optical attenuators: [0003] (1) The mechanical variable optical attenuator drives the attenuation change through the stepping motor, and the attenuation accuracy depends on the minimum change of the stepping motor, which can reach 0.04dB. [0004...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/01G02B6/26G02B26/02H04J14/02
Inventor 刘伟
Owner HUAWEI TECH CO LTD
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