Fiber lasers use rare-earth-doped fiber as the gain medium, and the pump light forms a high power density in the fiber core, causing the "population inversion" of the doped ion energy level. When a positive feedback loop (forming a resonant cavity) is properly added, It produces laser output.

With the rapid development of the Internet, network users' demands for network bandwidth are increasing day by day. In order to meet the needs of the market, the backbone of the communication network has undergone tremendous changes, and the traditional access network that has been changing less has......

GPON (Gigabit-Capable PON) technology is the latest generation of broadband passive optical integrated access standard based on the ITU-TG.984.x standard. It has many advantages such as high bandwidth, high efficiency, large coverage, and rich user interfaces. Most operators regard it as an ideal te......

The fiber optic sensor network has three basic components, one of which is called a single-point sensor. An optical fiber only plays the role of transmission here, and the other is called a multi-point sensor, where one optical fiber connects many sensors together so that many sensors can share the ......

A sensor is a detection device that can feel the information being measured, and can transform the sensed information into electrical signals or other required forms of information output according to a certain rule, so as to satisfy the transmission, processing, storage, and display of information ......

Local Area Network (LAN for short) refers to a group of computers interconnected by multiple computers and other devices in a certain area. They are not far away from each other in physical locations to allow users to communicate with each other and share printers and storage. A system in which comp......