Constant temperature control of the SLED underlying an adjustable driving-current

WANG Li-dong; SUN Chang-sen

A variable constant-current driver was proposed for a super luminescent diode (SLED) to meet the constanttemperature working requirement.This method was carried out by a microcomputer, MSP430, combining with proportional-integraldifferential(PID) algorithm and a semiconductor cooler.Driven by this controller,the SLED generated a stable output power and central wavelength.Experimental results demonstrated that the temperature accuracy of 0.1℃ was achieved when the environmental temperature changed from 10℃ to 40℃.The constant-driving current was stabilized at 0.1mA in the range from 0mA to 200mA.Thus,the driver can meet the demand of SLED application.

Corresponding author: SUN Chang-sen, suncs@dlut.edu.cn

1. School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116023, China

Received Date: 2007-12-19

Accepted Date: 2008-03-18

Available Online: 2009-02-25

Abstract: A variable constant-current driver was proposed for a super luminescent diode (SLED) to meet the constanttemperature working requirement.This method was carried out by a microcomputer, MSP430, combining with proportional-integraldifferential(PID) algorithm and a semiconductor cooler.Driven by this controller,the SLED generated a stable output power and central wavelength.Experimental results demonstrated that the temperature accuracy of 0.1℃ was achieved when the environmental temperature changed from 10℃ to 40℃.The constant-driving current was stabilized at 0.1mA in the range from 0mA to 200mA.Thus,the driver can meet the demand of SLED application.

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Reference (9)

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Constant temperature control of the SLED underlying an adjustable driving-current

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References

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