Patent ID: 6584133
Filing Date: 2003-06-24
Classification: H01S

Abstract:
A high power diode laser array system having narrow spectral width output comprising:(a) a high power diode laser array comprising multiple laser diode emitters arranged in approximately a straight line; (b) a cylindrical collimating element positioned to receive the output of the laser diode array and provide an output beam that is collimated in a direction perpendicular to a direction along the length of the array of emitters; (c) a diffraction grating mounted to receive the collimated beam from the collimating element on a beam path, the diffraction grating oriented at an angle to the incident beam such that a portion of the light in the beam incident on the grating is directed back on the beam path to the collimating element and is focused on the array of laser diode emitters to provide feedback thereto to narrow the spectral range of the laser light output; and (d) a magnifying system formed of optical elements that receives the beam from the cylindrical collimating element and images the emitters of the array in the long dimension of the array that is along the length of the array onto the diffraction grating with a selected magnification factor, the grating having grooves which are aligned parallel to the long dimension of the array of emitters.