Beam shaper system for laser diode array

摘要

Proposed is a beam shaper for beams emitted from at least one laser-diode bar and consisting of a fast-axis collimator composed of a common cylindrical lens with an aspherical profile, an array of spherical/aspherical telescope units formed from a pair of microlenses, where each individual telescope unit is shifted in accordance with a predetermined law to a certain distance relative to a neighboring individual telescope unit, an array of cylindrical lenses shifted relative to each other in accordance with another predetermined law, and a system of collimation lenses that collimate the beams of the predetermined spatial pattern into a two-dimensional pattern having a less discrete and more uniform distribution of light intensity and a shape more convenient for subsequent coupling, e.g., for focusing into the end face of an optical fiber of a light transmission system.

主权项

1. A beam shaper system for at least one laser-diode bar located spatially in an orthodox X-Y-Z coordinate system having an X-Y plane, X-Z plane, Y-Z plane and comprising:
a) a fast-axis collimator located in the X-Y plane of the orthodox X-Y-Z coordinate system and comprising a first aspherical-cylindrical lens, the laser diode having emitters which are located linearly in the X-Y plane and are spaced from each other with a predetermined laser-diode emitter pitch; b) an array of spherical/aspherical telescope units shifted with respect to each other in the direction of the fast axis in accordance with a first predetermined law, each telescopic unit comprising a pair of individual lenses; c) an array of second cylindrical lenses where the second cylindrical lenses are shifted relative to each other in the plane Y-Z in the direction of the Y axis in accordance with a second predetermined law; and d) a focusing unit located in the Y-Z plane having means for reshaping and focusing the beams which passed through the array of the second cylindrical lenses.