Variable bulkhead type attenuator (adapter type,female to female) has a structure similar to an optical adapter. It utilizes the air gap between the two connectors to realize optical attenuation. However, the air gap can be continuously adjusted and fixed manually. This induces a variable optical attenuation from 0.5dB to 20dB. This component can be used in applications where optical attenuation needs to be frequently adjusted.

The Variable adapter type attenuator has included tool provides ability to increase attenuation level to desired dB. Their attenuation range is 0dB to 20dB depending on light source.

ADTEK provides a wide range of adapter type single mode and multimode variable attenuator. They have low return loss and works at both 1310nm and 1550nm wavelength range. ST and FC connector types with PC or APC polish are available.