Abstract: A Variable Optical Attenuation Collimator (VOAC) is disclosed to achieve a variable degree of optical power attenuation through the collimator by adding an Attenuation Control Element (ACE) between a lens element and fiber pigtails of a traditional fiber optical collimator. The body of the ACE can be implemented in many different ways such as a polymer-network liquid crystal light scattering and absorbing material, a Refraction Index Gradient Controllable Material (RIGCM) capable of controllably swerving the direction of light propagation, a Refraction Index Controllable Material (RICM) capable of controllably defocusing an incident light power and a transparent Length Controllable Material (LCM) capable of controllably changing the spacing between the lens element and the fiber pigtails causing a defocusing of an incident light power.