Semiconductor laser driving circuit

Details Semiconductor laser driving circuit Semiconductor laser driving circuit

H - Electricity

01

S

315/24

H01S 3/10 (2006.01) H01S 5/042 (2006.01) H03K 17/12 (2006.01) H01S 5/062 (2006.01)

Patent

CA 2011168

Abstract of the Disclosure A semiconductor laser driving circuit is arranged so that a predetermined number of transistors can be selected from a group of transistors disposed in parallel according to the characteristics of a semiconductor laser and the selected transistors are connected in parallel between the semiconductor laser and a current source. An optimum current is allowed to flow through the semiconductor laser to cause it to generate a required light output. Moreover, a collector current which provides the optimum characteristics flows through each of the selected transistors. Therefore, an optimum high-speed response can always be realized irrespective of the magnitude of the driving pulse current of the semiconductor laser.

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