Fiber optic cable splice attenuation is generally how much?

Single-mode fiber splice attenuation in the 1550nm working wavelength one-way test should be ≤ or 0.1dB, two-way average should be ≤ 0.08dB. average attenuation (according to the 2KM disk) should be ≤ 0.26dB / KM. live joints ≤ 0.5dB / a. Flanged attenuation ≤ 0.3dB / a. Flange attenuation ≤ 0.3dB/pc. \x0d\\\\x0d\\ Optical fiber, referred to as fiber optics, is a light-conducting tool that achieves the principle of total reflection transmission of light in fibers made of glass or plastic. Fiber optic cable is a certain number of optical fibers in accordance with a certain way to form the core of the cable, the outer jacket, and in some cases, the outer jacket, to achieve optical signal transmission of a communication line. \x0d\ Optical fiber, referred to as fiber optics, is a light-conducting tool that achieves the principle of total reflection transmission of light in fibers made of glass or plastic. The microscopic fiber encapsulates a bundle of fibers in a plastic sheath that allows it to be bent without breaking. Typically a transmitting device at one end of the fiber uses a light-emitting diode or a beam of laser light to transmit pulses of light into the fiber, and a receiving device at the other end of the fiber detects the pulses using a photosensitive component. The cable containing the optical fiber is called a fiber optic cable. The use of optical fibers as a means of transmitting information over long distances was prompted by the fact that the transmission losses of light in optical fibers are much lower than those of electricity conducted through wires, and even more so by the fact that the main raw material for its production is silicon, which is in great abundance and relatively easy to mine, and is therefore inexpensive. As the price of optical fiber has been further reduced, it has also been used for medical and recreational purposes. \x0d\ Fiber optics are divided into two main categories, gradient fiber optics and mutant fiber optics. The former has a gradual change in refractive index while the latter has a mutation in refractive index. It is also divided into single-mode fiber and multi-mode fiber. In recent years, new photonic crystal fibers have been introduced. \x0d\ optical fiber is a double structure, the core part of the high refractive index glass, the surface part of the low refractive index of glass or plastic, the light in the core part of the transmission, and in the junction of the surface layer of the constant total reflection, along the "zig-zag" shape of the forward transmission. This fiber is slightly thicker than a hair, such a thin fiber to have a refractive index of very different double structure distribution, is a very amazing technology. Scientists from various countries after many years of efforts to create a method of internal attachment, MCVD method, VAD method, etc., made of ultra-high purity quartz glass, made of optical fiber transmission of light efficiency has improved very significantly. Now the better optical fiber, its light transmission loss per kilometer is only zero point two decibels; that is to say, after spreading a kilometer loss of only 4.5%.