An optical attenuator is a device used to reduce the power level of an optical signal, either in free space or in an optical fiber. Fiber optic attenuator is an optical attenuator used in the fiber optic communications to reduce the optical fiber power at a certain level. The most commonly used type is female to male plug type fiber optic attenuator. It has the fiber connector at one side and the other side is a female type fiber optic adapter, with fiber optic attenuator name based on the connector type and the attenuation level. FiberStore supply Fiber Optic Attenuator FC, SC/APC, ST, PC, LC, UPC, MU, FC/APC, SC, LC/APC, fixed value plug type fiber optic attenuators with different attenuation level, from 1dB to 30dB. You can buy fiber optic connection products on our store with your confidence. All of fiber optics supplies with high quality but low price.

Here I have listed two examples:
(1)LC Fiber Optic Attenuator
LC fiber optic attenuators are UPC and APC types, to fit for the according LC connectors. LC UPC fiber optic attenuator return loss is more than 55dB, LC APC fiber optic attenuator return loss is more than 65dB. Working range of the LC fiber attenuator is 1240nm to 1620nm, including the typical 1310nm and 1550nm single mode applications. They are constructed of the highest quality materials and every piece is tested during production. The LC fiber optic attenuator is used with fiber amplifier, DWDM and telecommunications equipment. We supply single mode LC/APC, LC/UPC fiber optic attenuators including the bulkhead (Flange type) LC attenuator and female to male LC fiber attenuator. Attenuation range available is from 1dB to 30dB.

(2)Variable Attenuator
Optical variable attenuator is a double window (1310/1550nm) of passive components. The variable optical attenuator could continually and variably attenuate the light intensity in the optical fiber transmission. Variable fiber optic attenuator could help simulate distance or actual attenuation in the fiber optic testing work by inserting a calibrated attenuation into the link. By using the variable fiber optic attenuator, technicians could verify the power margin received by testing the fiber optic link power budget. Variable fiber attenuator can help user vary the light power injected from a light source into the optical fiber. Important parameter of variable fiber attenuator include its insertion loss, reflection loss and attenuation range. We supply ST, FC, SC, LC variable fiber optic attenuators with APC, UPC type. Attenuation range available is from 1dB to 30dB. Variable Fiber Optic Test Attenuators generally use a variable neutral density filter. Despite relatively high cost, this arrangement has the advantages of being stable, wavelength insensitive, mode insensitive, and offering a large dynamic range. Other schemes such as LCD, variable air gap etc. have been tried over the years, but with limited success.