![]() An optical attenuator is a device that is used to reduce the intensity of a light beam, i.e., reducing its optical power. The amount of attenuation can be said in terms of an optical density or decibels, at times you can even say it in percent of transmitted or blocked optical power. Basic Requirements In few cases, there is a need for a fixed degree of attenuation, whereas in some other cases one may find the requirement of the variable optical attenuator (VOA), where you can adjust the degree of attenuation, for example manually using any knob. Having a stepwise variable attenuation can be the ultimate solution. You will find that with the help of an electronic signal you can control the adjustment of the attenuation. The device gets converted into an optical modulator if you make this adjustment very fast. The attenuation of power must be done in such a way that the transverse beam profile is not affected. This case happens for example when there is a need for a high-power laser to be characterized with the help of a beam profiler that can handle only a limited amount of optical power. The problem can occur when the beam profile is distorted by the attenuator. When you work with high-power laser beams, the power handling capability of an optical isolator may be another essential aspect that you must consider. Safeguarding the detrimental effects on the attenuated beam, such as thermally induced changes of the attenuation degree of beam distortions along with safely avoiding damage of the attenuator is essential. There are different optical attenuators to free-space beams that are applicable, whereas, for waveguides of other kinds, others are of a fiber-optic type or work. Fiber-optic Attenuators In the context of fiber optics, various types of optical attenuators can be used. Placed between two lenses, a few of them just contain some type of bulk-optical attenuator for collimating the beam. On the other hand, optical circulator is a purely fiber-optic device. Find the best Optical Isolator supplier online that can give you these products at an affordable pricing range. You can contact them online.
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