Optical bench circularizer having alignment indentations and associated methods

摘要

An optical apparatus for circularizing a laser beam includes a bench having indentations thereon and optical elements provided in these indentations. A first optical element has a high numerical aperture. A second optical element collimates the beam output by the first optical element and is spaced from the first optical element. This spacing is determined in accordance with a location of the beam output by the first optical element at which the beam will be most circular. The indentation in which the second optical element is placed may be both vertically and horizontally displaced from the indentation in which the first optical element is placed.