Patent ID: 9014220
Filing Date: 2015-04-21
Classification: H01S

Abstract:
1. Optical apparatus, comprising: a gain-fiber having first and second opposite ends and having a fundamental emission wavelength for laser radiation; a source of optical pump-radiation including a plurality of diode-laser bars, each thereof having a plurality of diode-laser emitters therein, with each emitter delivering radiation into a corresponding one of a plurality of optical fibers having a rectangular core, with sides of the rectangular core aligned with the fast- and slow-axes of the emitter at a proximal end of the fiber, and wherein distal ends of the fibers are formed into a two-dimensional array of columns and rows and with sides of the rectangular cores in each column and each row parallel to each other to create a two dimensional array of radiation beams; collimating optics arranged to collimate the individual radiation beams emitted from the distal ends of each of the rectangular-core fibers while maintaining the propagation of the beams in the two dimensional array; and a focusing lens arranged to focus the collimated radiation beams from rectangular-core fibers into the first end of the gain-fiber.