In the optical fiber field, optical passive components is an essential part with the fiber optic communication device. This is a kind of optical components, the process principle to adhere to the fundamental laws of optics and lightweight theory and electromagnetic theory, the technical indicators, formula plus a variety of testing methods, and it is closely linked to the fiber optics, integrated optics; electric passive components are essentially different. Fiber optic cable, which function as a link, distribution, isolation, filtering the part. Actually there are a number of optical passive devices used: optical splitter, optical attenuator, optical isolators, connectors(fiber optic SC to ST connectors), jumpers, optical switches.In Fiberstore,you can buy fiber optic products on our store together with your confidence. All of fiber optics supplies with good quality but good deal.Today,I focused on two widely used optical passive devices,connectors and optical attenuators.
Optical connectors:
An optical fiber connector terminates get rid of an optical fiber, and enables quicker connection and disconnection than splicing. The connectors mechanically couple and align the cores of fibers so light can pass. Better connectors lose almost no light due to reflection or misalignment with the fibers.
LC optical connector do you know? Let us to learn more info about connector absolutely help understanding them.LC fiber optic connector is really a small form factor connector that uses a 1.25 mm ferrule, half the dimensions of the SC fiber optic connector. This may raise the density of fiber optic connector in fiber optic patch panels. Otherwise, it is a standard ceramic ferrule connector, easily terminated with any adhesive. Good performance, highly favored for singlemode. Optical fiber connectors are employed in telephone company central offices, at installations on customer premises, and in outside plant applications to get in touch equipment and cables, or to cross-connect cables.
Most optical fiber connectors are spring-loaded, and so the fiber faces are pressed together if the connectors are mated. The resulting glass-to-glass or plastic-to-plastic contact eliminates signal losses that might be brought on by an air gap between your joined fibers.
Every fiber connection has two values:
Attenuation or insertion loss Reflection or return loss.
Optical attenuators:
An optical attenuator is a device accustomed to reduce the power level of the optical signal, either in free space or perhaps in an optical fiber. The basic forms of optical attenuators are fixed, step-wise variable, and continuously variable.
Variable Optical Attenuator (VOA) is a vital passive devices, in optical fiber communications to attain real-time charge of the signal, by attenuation from the transmitted optical power and optical wavelength division multiplexing device (WDM), spectroscopic detector (TAP the PD), erbium-doped fiber amplifier (EDFA), optical devices constitute ROADM VMUX, gain-flattened EDFA modules, may also be used directly within the optical receiver overload protection.Furthermore, the measurement from the power meter instrumentation, calibration, but also need to use to VOA.
In the Internet,I saw a written report it claims that there are two main types of optical communication component attenuators which are variable and fixed. Variable Optical Attenuators (manually controlled and electronically controlled VOAs) represented 68 percent from the worldwide consumption (use) value of fiber optic component-type attenuators found in the chosen optical communication applications in 2008; However, in 2013 VOAs are forecasted to improve to 77 percent from the relative share of the market.And so i think the variable optical attenuator is a lot more important.
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