TX78
Optical communication devices, also known as optical devices, are divided into optical active devices and optical passive devices. The optical active device is the key device to convert the electrical signal into the optical signal or the optical signal into the electrical signal in the optical communication system, and it is the heart of the optical transmission system; the optical passive device is the device that needs to consume certain energy and has certain function but does not have the optical electric or the electrical optical conversion function in the optical communication system, and it is the joint of the optical transmission system
