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High power laser diode driver based on power converter technology

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2 Author(s)
Thompson, M.T. ; Lab. for Electromagn. & Electron. Syst., MIT, Cambridge, MA, USA ; Schlecht, M.F.

This paper describes the design of a high speed semiconductor laser diode driver designed for driving 500 mW to 1.5 W diodes at full optical power modulation up to frequencies of 10 MHz. The duty cycle of the modulation may be varied. A switching power-converter based current source allows a higher power delivery efficiency to the diode than in previous designs, allowing for a more modest power supply and dissipation requirements. A dynamic ripple cancellation circuit reduces the power converter output current ripple to less than 1% of full-scale current. The circuit is capable of delivering up to 2.5 A to a laser load, with a 10-90% switching risetime from laser threshold to full on of less than 20 ns

Published in:

Power Electronics, IEEE Transactions on  (Volume:12 ,  Issue: 1 )