Optical fiber fusion splicer is mainly used for the construction and maintenance of optical cables in optical communications, so it is also called optical cable fusion splicer. The general working principle is to use a high-voltage arc to melt the sections of the two optical fibers and use a high-precision motion mechanism to gently advance the two optical fibers into one to achieve the coupling of the optical fiber mode fields.
Optical fiber fusion splicer is mainly used in:
• Construction, maintenance and emergency repair of optical cable lines of telecommunications operators, communication engineering companies, and public institutions;
• Experiment, production and testing of optical devices;
• Teaching and research related to optical fiber communication in major universities
Ordinary optical fiber fusion splicers generally refer to single-core optical fiber fusion splicers. In addition, there are ribbon optical fiber fusion splicers specially used to splice ribbon optical fibers, sheath fusion splicers for splicing sheathed optical cables and jumpers, and splice protection polarization maintaining fiber fusion splicer for polarized fiber, etc.
According to different alignment methods, optical fiber fusion splicers can be divided into two categories: cladding alignment and core alignment. The cladding-aligned type is mainly suitable for occasions such as fiber to the home with low requirements, so the price is relatively low; the core-aligned fiber fusion splicer is equipped with a precision six-motor core alignment mechanism, a specially designed optical lens and software algorithms, which can accurately identify the fiber type and automatically select the matching splicing mode to ensure the splicing quality. The technical content is high, so the price will be relatively high.
Basic operation principle
Since the single-core optical fiber fusion splicer is the most widely used, the following will take it as an example. The single core welding machine is mainly composed of: microscope imaging system, microprocessor system, high voltage discharge part, heating part, mechanical structure part, peripheral interface, display and keyboard, power supply and other parts. The principle block diagram of the optical fiber fusion splicer is shown in the figure below.
The optical fiber is imaged on two CMOS sensors through a dedicated microscope. Then it is stored in the digital image processing unit. The fiber image represents the physical properties and geometric positions of the fiber in two mutually perpendicular directions. The digital image processing unit sends the fiber splicing and synthesis processing to the CPU, and sends the fiber image to the display through a dedicated interface display, analyze and judge the fiber image, and then generate various information prompts and control signals. The drive circuit generates various drive levels such as motor, light source and discharge after receiving the control signal; the welding discharge parameter control and high voltage are to generate the corresponding voltage and current according to the signal given by the CPU; the electrode is connected to the high voltage to generate an arc, using the arc high temperature to melt the fiber and low loss permanent connection.
Post time: 2021-01-15