The Study And Design On A New-type Semiconductor Laser Diode Driver

Semiconductor laser diode, which appeared in 1962, has the excellent character of high efficiency, small size, low weight, high reliability, direct modulation . With the rapid development of science and technology, the techniques of semiconductor laser diode have been applied widely in many fields such as industry, high tech and science research. But, semiconductor laser diode is a kind of device with high power density and sky-high quantum efficiency. Even a weak drive current or a slight temperature change will lead to a large change of output light power and device parameters, which directly damages the safe use of laser diode, so higher request to the laser diode driver is put forward . The control precision of traditional laser diode driver is very low, and the operation is difficult, which can not shift between constant current mode and constant power mode. However, the laser diode driver designed in this paper overcomes these disadvantages above, and possesses vivid technical advantage.The semiconductor laser diode driver that we design in this paper is based on the item: "JD2500-Semiconductor Laser Diode Driver" , Which even exceed the level of the same kind of product. Among drivers, the short-term stability of the driver whose drive current is 200 mA is 10ppm, and its long-term stability is 38ppm. Both of them are superior to the product of overseas companies. The...