Beam shaping device for focusing light beams from semiconductor laser

摘要

A beam shaping device, consists of a polarization beam splitter interface (PBS interface), four light surfaces and at least one light processing surface, as well as various entities are described. The PBS interface passes light in P polarization and reflects light in S polarization; two of the four light surfaces are light I/O surfaces, and the other two of them are light surfaces for processing (LSFP); the light processing surface is arranged and oriented to retro-reflect, or close to retro-reflect light beam coming from said PBS interface and back it to where it comes from, and, in the meantime, physically rotate the reflected light beam around its propagating direction by 90°, or close to 90°. The invention works for light beam in any polarization status including non-polarized beam.

主权项

1. A beam shaping device rotating each of incident light beams and, hence, altering a size-divergence product (SDP) in lateral and longitudinal directions, the beam shaping device comprising:
a polarizing beam splitter (PBS) interface, for passing light beams in P polarization and reflecting light beams in S polarization; two light input/output (I/O) surfaces, one being perpendicular to the incident light beams and another being perpendicular to light beams that leave the PBS interface; two light surfaces for processing (LSFPs), one being perpendicular to light beams passing the PBS interface and another being perpendicular to light beams reflected by the PBS interface; and each of the LSFPs arranged to retro-reflect back, or close to retro-reflect back the incident light beams; wherein the PBS interface, the two light I/O surfaces, and the LSFPs are integrated into one piece, so that the light beams in the beam shaping device are total internal reflection.