As a further improvement and development of light-emitting diodes, semiconductor lasers require more complex and finer material structures, more complete functions, and the advantages of combining the characteristics of many semiconductor materials. Semiconductor lasers are the core of semiconductor optoelectronic technology and the key devices for all optoelectronic applications to technology. Semiconductor lasers include laser diodes and optically pumped or electron beam pumped semiconductor lasers, among which electron beam pumped and optically pumped semiconductor lasers require high power supply and demand or extremely complex and rigorous electronic equipment to operate. This leads to the consumption of a large amount of resources for semiconductor lasers. In addition, the operation of the entire device is complicated and cumbersome, and it is rarely used in real life. On the other hand, everyone thinks that the device structure of the laser diode is fine and rigorous, and the operation is complicated, and people without certain professional skills cannot operate it, but the pumping method is simple, the energy efficiency that can be converted is relatively high, and the performance of the device in all aspects The performance is excellent, and everyone is very fond of laser diode devices [2].

Photodetectors, Photocells and CCDs

The aforementioned semiconductor light-emitting diodes and semiconductor lasers are devices that emit light. The so-called photoelectric detectors and photocells are now receiving light. Emitting light and receiving light are two processes that help each other. One collects light and stores it, and the other converts light energy into electrical energy or signals. Semiconductor photodetectors, batteries or some CCD detection devices mainly convert light energy or light signals into electric energy and electric signals, which can be used by human beings in real life. These special light-receiving instruments, such as photodetectors and photoelectrons, are designed to convert light energy into electrical energy. Some of these semiconductor optoelectronic devices are receiving and some are emitting, and they perform their duties but cooperate with each other. It is because of their mutual help that semiconductor optoelectronic devices can ensure that people have higher efficiency in life and work