Most fiber-optic attenuators exhibit a relatively high return loss (at least several dozens of decibels), i. For single-mode devices, the insertion loss can not depend on the direction of propagation, as long as no non-reciprocal parts are used, as e.
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Attenuators are usually passive devices made from simple voltage divider networks. Switching between different resistances forms adjustable stepped attenuators and continuously adjustable ones using potentiometers. A 3 dB pad reduces power to one half, 6 dB to one fourth, 10 dB to one tenth, 20 dB to one hundredth, 30 dB to one thousa.
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between different resistances forms adjustable stepped attenuators and continuously adjustable ones using.
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An optical attenuator, or fiber optic attenuator, is a device used to reduce the power level of an optical signal, either in free space or in an optical fiber. The basic types of optical attenuators are fixed, step-wise variable, and continuously variable. The power reduction is done by such means as absorption, reflection, diffusion, scattering, deflection, diffraction, and dispersion, etc.
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Standard attenuation values are 5, 10, 15, and 20 dB, available in SC, FC, ST, and LC connector styles. Using no air gap, filters, or light path discontinuities, attenuation is achieved by controlled absorption of light energy. OZ Optics offers a compact, rugged and low cost digital attenuator with high resolution, high speed, high attenuation range and high power han-dling (blocking technique only). The product range comes with extremely low return loss and high-quality ceramic ferrules that will deliver in the most demanding applications and ensure repeatable performance.
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