CONSTANT OUTPUT LIGHT ATTENUATOR AND CONSTANT OUTPUT LIGHT ATTENUATING METHOD

摘要

A constant output light attenuator, comprising a non-linear optical material (1) and an aperture (2) disposed on a same optical axis and also disposed on the same optical axis as input and output optical fibers (3) and (4), wherein a light beam output from the input optical fiber (3) is input into the non-linear optical material (1) and passes the non-linear optical material (1), the light beam passed through the non-linear optical material (1) is diverged radially about the optical axis, the aperture (2) allows to pass only the light beams within a specified radius of the radially diverged light beams, and the light beam passed through the aperture (2) is input into the output optical fiber (4), whereby, by optimizing the parameters such as the secondary non-linear refraction factor of the non-linear optical material (1), the thickness of the non-linear optical material, a distance between the non-linear optical material and aperture, and the opening diameter of the aperture, an output light beam with a specified intensity can be provided from the output optical fiber (4) irrespective of the intensity of the input light beam.