Search query: Constant current source of semiconductor laser

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abstract: To carry out theoretical analysis of the constant current source of the high stability semiconductor laser, and to perform in depth experiments and research on this basis. It used certain technical means, and the stability and safety of the laser's power supply were tested and studied based on theoretical analysis of the constant current source of the high stability conductor laser. According to the experimental results, it was proved that the development of high stability laser power supply was of great significance to the stability and safety of the laser power supply. In improving the stability and safety of semiconductor laser constant current sources, the application of high stability driving power that meets international standards has significantly improved the stability of output power and extended the use time. Therefore, it has certain value of application and promotion.
author_names: Libo Wu

Qinxin Wang

Shuqing Ma

Zhen Yin

Jianping Xu

Liyan Zhao
title: Theoretical Analysis and Experimental Research on Constant Current Source of High Stability Semiconductor Laser
year: 2018

abstract: In order to achieve the goal of constant output light power, the design of high accuracy digital control semiconductor laser constant current source is very important. Semiconductor laser is can be divided into load floating and load grounding two types based on the package. In this paper, a small power grounding type digital control semiconductor laser constant current source is realized by using ARM processor. By using this method, the semiconductor laser can be provided within the range of 0mA 500mA constant current. At same time, some functions such as slow start, temperature control, overcurrent protection are realized. In actual experiment test result show, the design method is stable, reliable and high accuracy.
author_names: Tonggang Zhao

Chuanlong Huang
title: The design and implementation of high accuracy digital control semiconductor laser constant current source
venue: Other Conferences
year: 2013

abstract: In order to satisfy high power and high stability requirements of the laser K98SA3F 30.00W R(operating current 12A,ripple coefficient requirement 0.05%,a constant current source circuit was designed.Its output current can realize high efficiency,high precision and high stability by the chip LTC1625,LT1620,MOSFET IRF7811,digital potentiometers AD5231 and a p type filter.The LTC1625 is a current mode synchronous step down switching regulator and the LT1620 is a current sense amplifier.The simulation results given by LTspiceIV show that,when working in constant current mode,the output current can be changed continuously from zero to 20A,the minimum variable stepping current value is 0.061A,the output current ripple coefficient of the circuit can be less than 0.001%.Results indicate the circuit can meet the application requirements of the semiconductor laser diode K98SA3F 30.00W R.
author_names: Kong Ling-hang
title: Design of constant current source for high power semiconductor laser diode
year: 2012

abstract: The pulse constant current source for the semiconductor laser is designed.The system adopts high power MOSFET and operational amplifier which has high common mode rejection ratio and low temperature drift as hard core.Moreover,the control technology of MCU and high precision D/A chip are combined to set the current and pulse length.In addition,the tunable voltage stabilizer using VICOR modules in series structure and several protecting circuits are also introduced,which is specified as wide tuning range of the voltage,high control precision,good stability,high adaptability to the high low temperature,and so on.
author_names: Ge Hong-wei
title: Research on High Pulse Constant Current Source for the Semiconductor Laser
year: 2012

abstract: A design of digital controlled constant current source for a high power semiconductor laser diode based on ADuC812 is described. The constant current source used a high power MOSFET as the current control device and a Hall current sensor as the feedback device of the sample current. The over current protection circuit and median filter arithmetic in software are designed to ensure stability and safety of laser diode operation. The practical application indicates that the constant current source is safe and reliable to the laser diode, with the linear control of the output current ranged from 0 to 50 Ampere and the 0.1 ampere precision.
author_names: Xianming Xiong

Ying Huang

Fangrong Hu
title: The design of constant current source of high power Semiconductor laser diode based on ADuC812
venue: 2007 International Conference on Communications, Circuits and Systems
year: 2007

abstract: To meet the high power and high stability requirements of BWT 915 10W and 915 30W pumped semiconductor laser (with adjustable current from 0 to 12A, current ripple factor less than 2% a dual control and dual output circuit is designed to allow the power supply output current adjustable from 0 to 12A. It is called dual control because power can control manually by an external knob to achieve current continuously adjustable, and also through DSP28035 to achieve current digital regulation. Temperature detection with protection circuits is also designed, and so is highly reflective pulsed light detection with protection circuits. The output state of the DSP is controlled by signals from the control card. They communicate each other through A 25 pin parallel port. By designing schematics, producing PCB and repeated tests, it is indicated that this dual power supply is a small ripple, high stability and efficient, small volume and light weight switching power supply.
author_names: Xue Huiyun

Che Yanbo

Teng Wen

Ma Yage

Ge Leijiao
title: Design of dual control and dual output constant current source for semi conductor laser diode
venue: 2013 5th International Conference on Power Electronics Systems and Applications(PESA)
year: 2013

abstract: Design and realization methods of integrated operational amplifier feedback constant current power in semiconductor laser reliability evaluation system are introduced in this paper.This numerical control constant current source with the core of single chip microcomputer can provide exact control for the output current,the control could attain milliampere level.This constant current source uses a high power darlington transistor as the current control device,the value and the range of the output current that can be adjusted are very large.The constant current source has protective and slow start function,so it not only can provide power for semiconductor laser,but also can effectively protect the laser.
author_names: Ruan Ying
title: Design of Constant Current Source in Semiconductor Laser Reliability Evaluation System
year: 2005

abstract: Abstract The semiconductor laser is the important part in the semiconductor laser frequency standard. The quality of light frequency standard depends on line width and stability of laser. Semiconductor laser is very sensitive to environmental changes, such as the temperature, humidity and so on. The driving voltage and circuit and the temperature compensation are significant to laser output stability. The paper put forward a novel method to drive the semiconductor laser based on constant voltage source. The experimental results show that the circuit is simple, reliable, and high precision. After improvement, the driving source of laser can promise parameters: constant current range is from 0 to 250 mA, and the drift of current is less than 10 6 and stability is 10 5 The drift of frequency of laser drive with the circuit is within 10 5 nm.
author_names: Zhifeng Zhang

Yusheng Zhai

S U Zhan

Yuling Su

Xinjie Wang

Yin-Xiao Du
title: A novel method to drive semiconductor laser for optical frequency standard based on constant voltage source
year: 2015

abstract: Small portable power semiconductor lasers( LD) have features of low voltage driving,safety incentives,high efficiency. It is widely used in terms of long distance communication,laser ranging,and holographic applications. LD stable optical power output and portability require high stability and small size of driving power,while requiring constant current output. Taking the synchronous buck( SR BUCK) topology with efficient controller as the constant current source core,the paper designed the high precision dual channel constant current source driving system with current adjustable. The constant current source used the current loop PI regulator negative feedback system,added voltage disturbance feed forward,compared the output current,adjusted and improved the accuracy of the system.Meanwhile,it completed the mathematical modeling and simulation systems,while testing and evaluating the system.The test results show that the constant current source has the characteristics of high overall efficiency,fast dynamic response time( 10ms),high output capacity( 300 watts) and stability( no overshoot),low ripple factor( 0. 075%,adjustment range( 0 12A),strong anti interference ability and so on.
author_names: Hu Xiao-qin
title: Design of High precision Dual channel Constant Current Driving Source for Laser Diode
year: 2015

abstract: To some degree,the performance of semiconductor lasers is influenced by temperature,in order to improve the stability of their work,this paper designed a temperature control system semiconductor lasers.The system used 0.5 mA constant current source to supply power for Pt100 temperature sensor,four wire measurement method was used to obtain accurate temperature signal.TLC2652 chopper amplifier was applied to design preamplifier.And a differential amplifier circuit was used to subsequently compare and amplify signal.The semiconductor cooler(TEC) was applied to achieve constant temperature control of the system.After the experimental data analysis,we can see that the constant temperature system can effectively work,the maximum deviation of temperature control is 0.02 .By adjusting the corresponding parameters,the temperature thermostat of system can be free to set,so as to use it in different temperature control environments.
author_names: Ding Guo-chao
title: Research on high precision temperature measurement of constant temperature control system of semiconductor laser
year: 2012