Simultaneous two wavelength operation in infrared lasers

Claim 1

A laser system with simultaneous, two different wavelength, single beam output operation; which comprises, a laser active media that produces a laser beam output, a partially transmitting mirror opposite one end of said laser active media in optical alignment therewith, a germanium flat, beam polarizer-beam separator positioned opposite the end of said laser active media opposite from said partially transmitting mirror in optical alignment therewith, with the surface thereof upon which the laser beam output is incident oriented at Brewster''s angle relative to the optical axis of said laser active media for refracting a beam of one polarization and reflecting a beam having an opposite polarization, a first optical grating positioned opposite said beam polarizerbeam separator for selecting a desired beam refracted by said beam polarizer-beam separator, thereby forming a first cavity arm, a second optical grating positioned opposite said beam polarizer-beam separator for selecting a desired beam reflected by said beam polarizer-beam separator thereby forming a second cavity arm, first and second apertures positioned adjacent opposite ends of said laser active media in optical alignment therewith for selecting TEMoo modes, and first and second variable loss elements positioned between said optical gratings and said germanium flat, beam polarizer-beam separator, said variable loss elements are positioned into said first and second cavity arms whichever has a higher gain transition for time synchronization of said two output beams.