Design of driving system of quasi continuous wave laser diode based on differential amplifier circuit

LIU Bin; HUANG Zhanhua; CAI Huaiyu

doi:10.7510/jgjs.issn.1001-3806.2015.02.004

LASER TECHNOLOGY > 2015 > 39(2): 166-169. > DOI: 10.7510/jgjs.issn.1001-3806.2015.02.004

LIU Bin, HUANG Zhanhua, CAI Huaiyu. Design of driving system of quasi continuous wave laser diode based on differential amplifier circuit[J]. LASER TECHNOLOGY, 2015, 39(2): 166-169. DOI: 10.7510/jgjs.issn.1001-3806.2015.02.004

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Design of driving system of quasi continuous wave laser diode based on differential amplifier circuit

Key Laboratory of Opto-electronics Information Technology, Ministry of Education, College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China

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Received Date: April 15, 2014
Revised Date: April 23, 2014
Published Date: March 24, 2015

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Abstract

In order to improve the stability and adjustability of the output of the driving system of high power laser diodes, improve the beam quality and increase the service life, based on the principle of differential amplifier circuit and open-circuit time constant, the static working point and the frequency response characteristics of the driving circuit were analyzed in theory and verified in experiments. The results show that the drive circuit can guarantee the output current to achieve the peak current of 0A~60A under the premise of no overshoot, the pulse width adjustable range from 20μs to continuous, the repetition frequency from 500Hz to 10kHz, the maximum power of 130W. This method improves the output stability, widens the adjustability of pulse width and repetition frequency and has more outstanding performance than the traditional methods.
- laser technique,
- quasi-continuous,
- differential amplifier circuit,
- wide range of modulation

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Design of driving system of quasi continuous wave laser diode based on differential amplifier circuit

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