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A laser driver circuit with constant wavelength and power

A laser driver and laser technology, applied in lasers, laser parts, semiconductor lasers, etc., can solve the problems of complex design, high cost, inability to effectively control optical power, etc., and achieve the effect of system stability, reliability and low cost

Active Publication Date: 2017-12-26
北京倍肯恒业科技发展股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the laser drive circuit of the present invention, it can not only ensure that the light emitted by the laser diode has a constant wavelength and power, but also effectively overcome the shortcomings of the prior art such as complex design, high cost and inability to effectively control the optical power.

Method used

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  • A laser driver circuit with constant wavelength and power
  • A laser driver circuit with constant wavelength and power
  • A laser driver circuit with constant wavelength and power

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Embodiment Construction

[0042] See attached figure 1 , a laser driver circuit with constant wavelength and power, including a laser diode, a wavelength closed-loop control circuit, and a power closed-loop control circuit. The laser diode is the core device of the laser driver circuit, the wavelength closed-loop control circuit and the power closed-loop control circuit are respectively electrically connected to the laser diode, and the light-emitting wavelength and output power of the laser diode are sampled and regulated , so as to achieve the purpose of constant control of the emission wavelength and output power of the laser diode.

[0043] See attached figure 2 , the wavelength closed-loop control circuit includes an RTD (Resistance Temperature Detector, resistance temperature detector) temperature acquisition sensor, a bridge temperature measurement circuit, a low-pass filter, a temperature comparison circuit, a TEC driver and a semiconductor refrigeration chip, and each device is sequentially...

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Abstract

The invention discloses a laser driver circuit having the constant wavelength and power. The laser driver circuit comprises a laser diode, a wavelength closed-loop control circuit and a power closed-loop control circuit. The laser diode serves as a core device of the laser driver circuit. The wavelength closed-loop control circuit and the power closed-loop control circuit are connected with the laser diode electrically and carry out sampling and controlling on the emitting wavelength and the output power of the laser diode, so that an objective of constant control of the emitting wavelength and the output power of the laser diode is achieved. According to the laser drive circuit, the light emitted by the laser diode can have the constant wavelength and power; and defects of complicated design, high cost, and ineffective light power control in the prior art can be overcome.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a laser driver circuit with constant wavelength and power. Background technique [0002] In the field of light detection technology, laser diodes are often used as light sources to excite the detection target to generate fluorescence. In order to ensure the accuracy of detection, the wavelength and power of the light emitted by the laser diode need to be kept constant. However, due to the physical characteristics of the laser diode, the wavelength of the light emitted by the laser diode is affected by its operating temperature. Therefore, as the working time of the laser diode increases, its operating temperature will increase, which will directly affect the wavelength of the light emitted by the laser diode. wavelength. As the temperature rises, the wavelength of light emitted by the laser diode will fluctuate within a certain range. This fluctuation has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/24H01S5/042
CPCG05D23/24H01S5/042
Inventor 姚世平刘光中姚洪涛李洲强张学治
Owner 北京倍肯恒业科技发展股份有限公司