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With solid-state devices such as the PIN diodes and metal-semiconductor field-effect transistor (MESFETs), resistors are replaced in variable optical attenuators. You can buy fiber collimator online. Producing an output optical beam with different attenuated intensity, VOA attenuates light beam or signal in a controlled manner. Between the light beams coming, the attenuator adjusts the power ratio from the light beam and the device entering the device over a changeable rate. To regulate optical power levels, VOA is usually used in fiber optic communication systems to prevent damages in optical receivers which may be due to fluctuating or irregular levels of power.
FiberMart Company, Inc.
212 West Lone Cactus Dr., Phoenix, Arizona 85027, USA
Tel : +1 (707)-702-1573
Fax: +1 (707)-424-8352