Optical Fiber Communication
Since the inception of laser and low loss optical fiber,Cnc machining optical fiber communication system with its technical and economic advantages of the rapid rise of unparalleled, and swept the globe. The system is based on optical fiber as the transmission medium to light as the carrier signal to transmit information in communication systems, applications of light wavelength of 1.0 ~ 1.μm Jing, the entire system from the electrical side machine, Optical, cable and repeaters pose. Fiber can be divided into single-mode fiber (SMF), multi-mode fiber (MMF), long-wavelength low drive bulk fiber (LMF), polarization maintaining fiber (PMF) and plastic optical fiber (POF) and so are many; commonly used for single-mode and multi-mode fiber, multimode fiber is more than light transmission mode, and single-mode fiber transmission of a light wave mode only. Single-mode fiber multimode fiber transmission distance than the length, the current general, the optical signal in the multi-mode optical fiber to be available for about 6km, the single-mode fiber transmission within 30km. Therefore, the price of single-mode optical devices than multi-mode optical devices. Practical optical fibers are usually more to strengthen the core, protecting materials, fixed materials combined to form the transmission line cable.
Fiber MODEM to be completed by optical signal and digital signal conversion between. Fiber MODEM generally have more than one data port to transfer synchronous or asynchronous signals. Cnc machining Communication speed up to 2Mbps or higher, with commonly used network communication rate is generally synchronous asynchronous 19200bps N × 64K or less. It is sufficient to meet the needs of distribution network communication。
In addition, there is a double-loop fiber optic MODEM with self-healing func- tion. This feature greatly enhance the reliability of the communication. the signal is not affected, while the main station to send the appropriate alarm and positioning signals, Cnc machining so that maintenance personnel section of cable fault repair time.