Welding machine, the pioneers of trajectory to optical fiber network to build the required weld "loss" to reduce the ~

Welding machine is through the arc discharge (is one of a kind of gas discharge.Between the electrodes of gas and two electrodes to high temperature and strong light, welding, etc.) of about 1800 ℃ heat will melt fiber end face, and in a flash will be placed in left and right sides of the fiber end face of the connected device.Optical fiber used in optical communication network which is produced by quartz glass, inside the center part of the fiber core and cover wrapped around its layers of components, in concentric circles.Optical signals into the fiber core, constantly reflection between fiber core and cladding for transmission.Optical fiber can be divided into two classes, respectively is the core part of a finer single-mode fiber (SMF) and fiber core part of the coarser the multimode fiber (MMF).SMF fiber core diameter is very fine, the criteria of SMF is only 9.2 mu m (0.0092 mm), as a single mode propagation light signal, so as to minimize the "decay", suitable for long distance, high speed transmission.MMF, on the other hand, with a diameter of 50 microns and 62 microns of the fiber core, with multimode transmitting light signals, so the time of arrival signal will appear deviation, may damage the normal operation of electronic equipment, and therefore not suitable for long distance, high speed transmission, generally used as indoor optical fiber cable.These optical fiber has been faced with a problem, is the "attenuation".Light travels inside the fiber, there will be a part of the light, from escaping into the fiber outside or transfer of a different wavelength of light causing a slight speed deviation caused attenuation (transmission loss).Sumitomo electric集团创造出了全球顶尖水准的超低损耗光纤，但是要构建高速且高可靠性的光通信网络，除了降低“传输损耗”之外，还需要降低光纤之间熔接时产生的“熔接损耗”。

Welding is the channel of light (that is, the fiber core) of the connecting link between end face.At present, the most commonly used in the optical communication network is the previously mentioned SMF, so welding must be just 9.2 microns diameter (0.0092 mm) of superfine fiber core position alignment.If appear between fiber optic axis offset and Angle offset or gap between optical fiber end face, because of the optical fiber and air refractive index is different form reflex, will lead to loss of welding.For example, even if only 1 microns (0.001 mm) of optical axis deviation, also can cause loss of 0.2 dB welding, therefore required to weld sub-micron precision optical fiber end face.Reduce the loss of welding become a major issue.Sumitomo electric集团克服各种技术性问题，于1980年发售首台MMF熔接机（TYPE-3）。这种熔接机使用显微镜直接观察光纤的外径位置并进行熔接。因此，虽然它的连接损耗依赖于作业者的技术和熟练度，但在纤芯直径较大的MMF中实现了低熔接损耗。另一方面，为了应对纤芯直径仅为MMF的1/5的SMF，住友电工于1982年开发了可对齐光纤外径位置的熔接机（TYPE-11）。这种熔接机在光纤熔接点以外的一侧设置光源，在另一侧设置光接收器件，在光接收量达到最大即纤芯之间的位置一致时进行熔接。但是，仍然存在很多问题，例如在相距数百m～数km的位置上配置光源和光接收(受光)器件的作业繁琐、连接时间长等都是亟需解决的课题。

Sumitomo electric group development team to create a technology called "fiber core look", by using a microscope optical fiber core parts of the automatic core.Went on sale in 1984 of the welding machine (TYPE - 33), developed by using high precision, high ratio of objective microscope to directly observe optical fiber core parts, fiber core alignment technology.And, the next model of this TYPE - 34 is in the image processing technology using a CCD camera.Thus to achieve the optical fiber core parts of the automation of observation and examination of core.However, there are still other topics.Now as light machine department of mechatronics department minister honma min, was an induction time is short, the staff engaged in the development of welding machine.

This series welding machine development, in the 80 s ~ 90 s of the 20th century with telecommunication operators, and other company for common development.Stage in the development of the real competition is after entering 2000, since then, sumitomo electric group of exclusive technology began to lead the welding machine to upgrade.