Patent ID: 7773655
Filing Date: 2010-08-10
Classification: G02B,H01S

Abstract:
1. A laser diode module comprising: a row of a plurality of spaced individual laser diodes emitting respective light beams; an optical assembly guiding the emitted light beams along a light path so that the light beams propagate substantially parallel to one another along a downstream stretch of the light path and together define an output light beam having a first diameter; a telescope impinged upon by and configured to compress the output light beam so as to radiate the compressed light beam with a second diameter smaller than the first diameter; the telescope being configured with planoconvex and planoconcave cylindrical lenses and selected from the group consisting of Galilean, Keplerian and Anamorphic prism pair configurations; an objective lens impinged upon by the compressed light beam with the second diameter and configured to couple the pump light into an output fiber; and reflective dielectric layers being selectively coated on flat surfaces of respective optical assembly, telescope and objective lens to prevent propagation of a backreflected light signal beam at a wavelength different from a wavelength of the output light beam.