Control method, device and optical module for providing bias voltage to APD

A technology of bias voltage and control method, which is applied in the field of optical modules, can solve the problems of APD damage and overshoot of avalanche diodes, and achieve the effect of protecting APD, simple logic and low cost

Active Publication Date: 2022-01-28
HISENSE BROADBAND MULTIMEDIA TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a control method, device and optical module for providing a bias voltage to the APD, so as to solve the problem that the current optical module is prone to overshoot and cause damage to the avalanche diode APD when the power is off.

Method used

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  • Control method, device and optical module for providing bias voltage to APD
  • Control method, device and optical module for providing bias voltage to APD
  • Control method, device and optical module for providing bias voltage to APD

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Embodiment Construction

[0032] In order to better understand the technical solutions in the present application, the technical solutions in the present application embodiment will be described in connection with the drawings in the present application, and The embodiment is merely the embodiment of the present application, not all of the embodiments. Based on the embodiments in the present application, one of ordinary skill in the art will belong to all other embodiments obtained without creative labor, and should belong to the scope of the present application.

[0033] One of the core links of the optical fiber communication is the conversion of the photoelectric signal, and the optical fiber communication is transmitted in the optical fiber / optical waveguide, and the passive transmission characteristics of light can achieve low cost, low loss information transmission. The information processing apparatus such as the computer uses an electrical signal, which requires the conversion of electrical signa...

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Abstract

This application discloses a control method, device and optical module for providing bias voltage to APD. The method includes: detecting the internal voltage of the MCU; judging whether the MCU is powered off according to the internal voltage of the MCU; High MCU's DAC output level to reduce the bias voltage provided to the APD. The control method for supplying the bias voltage to the APD provided by this application is to control the DAC to increase the output level by the MCU when the MCU is powered off, so that the bias voltage provided to the APD is pulled to a very low level at the beginning of the power-off. A level value, so that the subsequent overshoot peak value is within the safe working range of the APD, thereby protecting the APD and avoiding damage to the APD by the overshoot; in addition, the method provided by this application only uses software to avoid overshoot. No additional hardware devices are added, the cost is not high, and the implementation is simple and easy.

Description

Technical field [0001] The present application relates to the field of fiber optic communication technologies, and more particularly to a control method, apparatus, and optical module that provides a bias voltage to the APD. Background technique [0002] The portion received by the optical module is done by the Avalanche Photon Diodes (APD) to detect the input of the input to the current, but the work of the APD requires a higher bias voltage, and the temperature will change the sensitivity of the APD. Therefore, this bias voltage needs to follow temperature changes to ensure that the APD can work properly at each temperature. [0003] As the software is more and more applied in the optical module, the bias voltage supplied to the APD is controlled by the software inside the optical module, according to different temperatures, control DAC (Digital to Analog Converter, Digital Converter) The output different low voltage level is given to the high voltage circuit, generating the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/25
Inventor 王麟李刚
Owner HISENSE BROADBAND MULTIMEDIA TECH
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