Irradiated crosslinked polyethylene (PE-XC) pipe is a crosslinked pipe formed by extruding uncrosslinked polyethylene pipe and irradiated by electron accelerator or cobalt-60 radioactive source.
The crosslinking pipe produced by physical crosslinking method of electron accelerator has the obvious characteristics of uniform crosslinking degree, high purity, good health performance and reliable quality.
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Let's take a look at some common applications of semiconductor lasers:
Quantum-well semiconductor high-power lasers have important applications in laser processing of precision mechanical parts, and have become the most ideal and high-efficiency pumping source for solid-state lasers. Due to its high efficiency, high reliability and miniaturization, The continuous updating of solid-state lasers.
In the printing and medical fields, high-power semiconductor lasers are also used. In addition, such as long-wavelength lasers (in 1976, people used Ga[nAsP/InP to implement long-wavelength lasers) for optical communication, short-wavelength lasers for optical disk readouts. Since NaKamuxa realized GaInN/GaN blue lasers, visible light semiconductor lasers have been widely used in optical disc systems. For example, CD players, DVD systems and high-density optical memory visible-surface emitting lasers are important in optical discs, printers, and displays. Applications such as red, green and blue surface emitting lasers are more widely used. Blue-green semiconductor lasers are used for underwater communication, laser printing, high-density information reading and writing, deep water detection and for large-screen color display and High-definition color televisions. In summary, visible-light semiconductor lasers are used as light source for color displays, reading and writing of optical storage, laser printing, laser printing, high-density optical disk storage systems, bar code readers, and solid-state lasers. Pump source and other aspects have a wide range of applications. New lasers for quantum cascade lasers are used in the ring. In the field of detection and medical inspection. In addition, since the semiconductor laser can realize wavelength tuning by changing the magnetic field or adjusting the current, and a laser output with a narrow line width can be obtained, high-resolution spectroscopy can be performed using the semiconductor laser. The tunable laser is deep. An important tool for laser spectroscopy, which is rapidly evolving in the study of material structure. High-power mid-infrared (3.5 lm) LD is widely used in infrared countermeasures, infrared illumination, laser radar, atmospheric window, free space communication, atmospheric monitoring, and chemical spectroscopy. application.
Vertical cavity emitters with green to ultraviolet light have been widely used in optoelectronics, such as ultra-high density, optical storage. Near-field optical solutions are considered to be an important means to achieve high-density optical storage. Vertical cavity surface emitting lasers It can also be used in full-color flat panel display, large area emission, illumination, optical signal, light decoration, ultraviolet lithography, laser processing and medical treatment. I2) As mentioned above, semiconductor lasers have been obtained since the early 1980s. The development and practical application of DFB dynamic single longitudinal mode laser, the emergence of quantum well and strained layer quantum well laser, the development of high power laser and its array, the successful development of visible light laser, the realization of surface emitting laser, unipolar A series of major breakthroughs in the development of semiconductor lasers, semiconductor lasers have become more and more widely used, semiconductor lasers have become a major component of the laser industry, and it has become an indispensable part of the development of information, communication, home appliance industry and military equipment. The important basic device.
Semiconductor laser application
Semiconductor lasers are early-stage and fast-developing lasers. Due to their wide wavelength range, they are simple to manufacture, low in cost, easy to mass-produce, and because of their small size, light weight and long life, the variety is developing rapidly. The range is wide, currently more than 300 kinds, the most important application field of semiconductor laser is Gb LAN, 850nm wavelength semiconductor laser is suitable for 1Gh/. LAN, 1300nm -1550nm wavelength semiconductor laser is suitable for 1OGb LAN system [i1. The application range of semiconductor laser covers the whole field of optoelectronics, has become the core technology of today's optoelectronic science. Semiconductor laser in laser ranging, laser radar, laser communication Laser analog weapons, laser warning, laser guidance tracking, ignition detonation, automatic control, and testing instruments have been widely used, forming a broad market. In 1978, semiconductor lasers began to be used in fiber-optic communication systems. Semiconductor lasers can be used as light sources and indicators for fiber-optic communication and as a photovoltaic subsystem through large-scale integrated circuit planar processes. Because semiconductor lasers have excellent features of ultra-small, high-efficiency, and high-speed operation. Therefore, the development of such devices has been closely integrated with optical communication technology from the beginning, and it is in the optical communication, optical conversion, optical interconnection, parallel optical wave system, optical information processing and optical storage, optical computer external equipment. It has important applications. The advent of semiconductor lasers has greatly promoted the development of information optoelectronic technology. Today, it is the fastest growing and most important laser fiber communication source in the field of optical communication. Semiconductor lasers combined with low Loss of fiber has had a major impact on fiber-optic communications and has accelerated its development. It can be said that without the advent of semiconductor lasers, there is no current optical communication. GaAs/GaAlA. Double heterojunction lasers are important sources of optical fiber communication and atmospheric communication. Today, distributed optical semiconductor transmission systems (DFB-LD) are used for long-distance, large-capacity optical information transmission systems. Semiconductor lasers are also widely used in optical discs. In technology, optical disc technology is a comprehensive technology integrating computing technology, laser technology and digital communication technology. It is a high-density, fast, efficient and low-cost information storage method, which requires the information generated by the semiconductor laser beam. Write and read.