Research on Semiconductor Collimator Design Based on ZEMAX

When a single spherical mirror is used to compress laser beams,there usually is a problem that the poor divergence can be resulted in or too many spherical lenses have to be used.By using a ABCD matrix method to analyze the Gauss beam passing through a single lens in theory,a conclusion that the beam from a semiconductor laser can not be collimated ideally with a single lens is drew.A design scheme based on ZEMAX is proposed for the collimation of a semiconductor laser source.The design and optimization method is given.For a 808 nm semiconductor laser commonly used in engineering,a collimator with two lenses is designed and its aberration is corrected by using the proper optimization function and weight in ZEMAX.By using a non-spherical surface,fine collimation is implemented at a divergence angle of 0.032 mrad.This design has the features of less lenses and simple structure.