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Driving system and driving method of DFB laser

A DFB laser and drive system technology, applied to lasers, laser parts, semiconductor lasers, etc., can solve problems such as difficult to meet high precision and high reliability, difficult to adjust PID control parameters, complex circuits, etc., to improve flexibility and The effect of reliability, easy digital control, and easy debugging

Inactive Publication Date: 2014-04-09
江西华神智能物联技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, most existing DFB lasers use PID controllers built with discrete components for automatic power control (APC) and automatic temperature control (ATC). Requirements for high precision and high reliability

Method used

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  • Driving system and driving method of DFB laser
  • Driving system and driving method of DFB laser

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Embodiment Construction

[0022] Such as figure 1 As shown, the driving system of the DFB laser of the present invention includes a main controller 10 , a DA converter 20 , a constant current driving circuit 40 and a constant temperature driving circuit 50 . In use, the constant current drive circuit 40 and the constant temperature drive circuit 50 are coupled to the DFB laser 30 .

[0023] The main controller 10 is used for receiving external driving commands and analyzing corresponding constant current control signals and constant temperature control signals. According to the driving current and temperature of the DFB laser 30 , specific constant current control signals and constant temperature control signals can be set to control the driving current and temperature, thereby controlling the power of the laser. The settings of the driving current and temperature of the DFB laser 30 are included in the constant current control signal and the constant temperature control signal. The main controller 1...

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Abstract

The invention provides a driving system of a DFB laser and a driving method using the system. A constant-temperature driving system and a constant-current driving system are respectively constructed through two integrated circuits and are connected through a main controller and a DA converter to form the driving system of the DFB laser. Driving can be realized by the steps of connecting a PC through the main controller, setting driving current and temperature of the DFB laser through the PC and transmitting an external driving instruction to the main controller. The system is a laser driving system with a high degree of integration, the system is simple and easy to debug and easy in digital control, and the flexibility and reliability of the system are greatly improved.

Description

technical field [0001] The invention relates to the field of optoelectronics, in particular to a driving system and a driving method of a DFB laser. Background technique [0002] Distributed Feedback Laser (DFB laser) is an ideal electron-photon direct conversion device with high quantum efficiency, but small changes in current and temperature will lead to great changes in output optical power. As an application, DFB lasers are required to have low electrical noise and high stability, because the fluctuation of the driving current will not only cause laser intensity noise, but also cause broadening of the output wavelength spectral linewidth. DFB laser is a current-driven device, and high stability of the driving current is the prerequisite for stable output power. In addition, DFB lasers are temperature-sensitive devices, and fluctuations in ambient temperature can not only cause fluctuations in the supply current, but also change the threshold current and output power of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/068
Inventor 王同志
Owner 江西华神智能物联技术有限公司