Patent ID: 6356578
Filing Date: 2002-03-12
Classification: G02B,H01S

Abstract:
A variable laser power delivery apparatus having selectable power output comprising:a laser beam generator for delivering a preselected polarized wavelength beam along an optical beam path; a dichroic mirror transmitting the preselected wavelength beam at P-polarization and reflecting the preselected wavelength beam at S-polarization; said dichroic mirror located along said beam path in optical communication with said laser beam generator so that said beam incidents on said dichroic mirror; a beam polarization rotator mounted along said beam path in optical communication with both said laser beam generator and said dichroic mirror; said beam polarization rotator located between said beam generator and said dichroic mirror so that said beam passes through said polarization rotator and adjustment of said rotator rotates the polarization of said beam prior to said beam incidenting on said dichroic mirror; means to direct either the transmitted or reflected beam along an output path as the output of the apparatus; means to adjust the polarization rotator of said preselected wave length beam to rotate the polarization of the preselected wavelength beam to change the ratio of P-polarization versus S-polarization at said dichroic mirror to select a desired power output of the apparatus.