The design and implementation of high accuracy digital control semiconductor laser constant current source

2013 ◽  
Author(s):  
Tonggang Zhao ◽  
Chuanlong Huang
Keyword(s):  
Semiconductor Laser ◽  
Digital Control ◽  
Current Source ◽  
High Accuracy ◽  
Constant Current ◽  
Constant Current Source ◽  
Design And Implementation

Development of a Multi-Function Virtual Instrument Based on a Constant Current Source

2013 ◽  
Vol 385-386 ◽  
pp. 492-495
Author(s):  
Dong Bing Dai ◽  
Ya Jun Wang ◽  
Ye Ping Sun ◽  
Zheng Guang Liu
Keyword(s):  
Data Acquisition ◽  
High Precision ◽  
High Power ◽  
Virtual Instrument ◽  
Current Source ◽  
High Accuracy ◽  
Constant Current ◽  
Constant Current Source ◽  
Data Acquisition Card ◽  
Further Development

Virtual instrument is a result of the computer combined with some instrument hardware, working for the instrumentation applications, it is one trend of the instrumentation development .This paper presents a design of a high-power and high-precision constant current source, studied three different electrical testing technologies based on constant current source and propose the principle of integrated the three electrical test technologies on a virtual instrument platform. A multi-function virtual instrument system based on LabView language, USB data acquisition card and a constant current source has been developed. This system has a high accuracy, high integration and a thecapability of further development etc..

scholarly journals Research on Power Stability Control of Semiconductor Laser

2018 ◽  
Vol 232 ◽  
pp. 04086
Author(s):  
Qian Guo ◽  
Xiaodong Zhang ◽  
Fengnian Tian
Keyword(s):  
Semiconductor Laser ◽  
Current Source ◽  
Optical Power ◽  
Stability Control ◽  
Working Environment ◽  
Constant Current ◽  
Constant Current Source ◽  
Loop Control ◽  
The Stability ◽  
Hardware Circuit

In order to guarantee the stable emission power and good working environment of semiconductor laser, a new hardware circuit is selected and designed to realize automatic optical power control, in which a negative feedback operation amplifier circuit is adopted to form the constant current source, and an optoelectronic feedback to realize closed loop control in this paper. And then, the corresponding steady control circuit is also designed, so that the stable power can be output. The experimental results show that the stability of laser power is better than 0.74% when the system works.

The Design of the Detonator Wick Resistance Auto-Stripping Detector

2011 ◽  
Vol 383-390 ◽  
pp. 6003-6009
Author(s):  
Ming Xin Yang ◽  
Nan Wang ◽  
Wei Song
Keyword(s):  
Assembly Line ◽  
Current Source ◽  
High Accuracy ◽  
Constant Current ◽  
Constant Current Source ◽  
External Insulation ◽  
Safety Protection ◽  
Protection Circuit ◽  
Traditional Production ◽  
High Degree

This paper introduces an online auto-monitoring instrument which can automatically slice the external insulation cover of the leading wire and accurately measure the wick resistance in the assembly line of the detonator wick resistance. With safety protection circuit, constant current source is employed to measure the resistance, endowing the design with high accuracy, safety protection features and high degree of automation. It is expected to change the traditional production process where manual work has been used to measure and collect statistics, hence could greatly improve labor productivity as well as product quality and produce favorable application and promotion value.

scholarly journals Low noise constant current source for bias dependent noise measurements

2011 ◽  
Vol 82 (1) ◽  
pp. 013906 ◽  
Author(s):  
D. Talukdar ◽  
R. K. Chakraborty ◽  
Suvendu Bose ◽  
K. K. Bardhan
Keyword(s):  
Current Source ◽  
Low Noise ◽  
Constant Current ◽  
Constant Current Source ◽  
Noise Measurements
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