Research on adjustable high power high pulse-repetition-frequency compact LD power supply
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Information Optoelectronics Research Institute, Harbin Institute of Technology at Weihai, Weihai 264209, China
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Corresponding author:
TIAN Zhao-shuo, tianzhaoshuo@126.com
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Received Date:
2012-03-23
Accepted Date:
2012-04-23
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Abstract
In order to obtain high power and high pulse-repetition-frequency(PRF) laser pulse,a nanosecond nanosecond-level laser diode driver with advantages of small size,light weight and low cost was designed.The narrow pulse,which was generated by an improved mono-stable circuit,was amplified to high current narrow pulse to drive metal-oixde-semiconducor field-effect-transistor(MOSFET)switch for narrow pulse of high current.The output current of the driver was 0A~80A;the rise time of the pulse was 2.8ns;the fall time was 3.8ns;the pulse width can could be adjusted between 5ns and 500ns;the narrowest with the minimal pulse width can be of 5.2ns;and the PRF pulse repetition frequency was up to 200kHz.When this power supply was used for a 905nm laser diode,its peak laser power was up to 70W at PRF of 10kHz.The results show that the narrow pulse can be used to drive MOSFET to obtain 10ns or narrower pulse with high PRF and current,and this driver can completely meet the demand for driving high power laser diode.Further research is necessary for 100A or higher drive current.
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