Semiconductor lasers are diodes that emit coherent light by stimulated emission.They consist of a p-n junction inside a slab of semiconductor.Excitation is provided by current flow through the device,and the cleaved ends of the diode provide the feedback mirrors.
半导体激光器是二极管发出相干光的受激发射.他们构成了一个PN结内板坯的半导体.励磁是所提供的电流流经该装置,以及它的两端的二极管提供的反馈意见后照镜.