Patent ID: 7817693
Filing Date: 2010-10-19
Classification: B23K,G02B,H01S

Abstract:
1. A method for producing high optical power density, said method comprising: combining laser beams emitted from a plurality of laser bars by spatial multiplexing to become substantially parallel with an optical axis, each single laser bar comprising one or more diode lasers, slow axes of adjacent diode lasers of said single laser bar being substantially parallel with each other and said adjacent diode lasers emitting substantially to a same direction, wherein said laser bars are arranged in three or more sectors around said optical axis, a direction of the slow axes of the laser diodes in a first laser bar is substantially different from a direction of the slow axis of the laser diodes in a second laser bar, light emitting surfaces of all diode lasers of at least one of the laser bars are arranged on an area, the width of the area is less than 2.5 millimeters in a direction of the slow axis of the diode lasers of said at least one laser bar, said width being determined at a surface of said laser bar.