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What Should You Know before you Purchase Fiber Optic Attenuators?
Bigger is much better, right? Or so many people believe. Beginners in fiber optic technology are often confused with why optic attenuators should reduce light intensity. Aren’t we using amplifiers to improve the signal electricity? The fact is that too much light can overload a fiber optic receiver. Optical fiber attenuators are needed when a transmitter delivers too much light, such as when a transmitter is very close to the receiver.
So how exactly does a Fiber Attenuator Work?
Attenuators usually work by absorbing the sunshine, such as a neutral density thin film filter or by scattering the sunshine such as an air gap. They should not reflect the light since that could cause unwanted back reflection within the fiber system. Another type of attenuator utilizes a length of high-loss optical fiber that operates upon its input optical signal power level in such a way that it is output signal power level is less than the input level. The power reduction is done by such means as absorption, reflection, diffusion, scattering, deflection, diffraction, and dispersion, etc.
What’s the Most Important Feature Should a Fiber Attenuator Have?
The most crucial spec of an attenuator is its attenuation versus wavelength curve. Attenuators should have the same impact on all wavelengths used in the fiber system or at least as flat as possible. For instance, a 3dB attenuator at 1500nm should also lessen the concentration of light at 1550nm by 3dB or as close as possible, this is also true inside a WDM (Wavelength Division Multiplexing) system.
For purchasing more high quality fiber optic attenuators with low cost or for more products’ information, please contact a Sopto representative by calling 86-755-36946668, or by sending an email to info@sopto.com.