針對(duì)國(guó)內(nèi)外現(xiàn)有半導(dǎo)體激光器準(zhǔn)直器件的缺點(diǎn)，提出了一種用于半導(dǎo)體激光器準(zhǔn)直的相位型二元菲涅耳衍射透鏡的優(yōu)化方法。該方法在現(xiàn)有衍射透鏡加工設(shè)備分辨率條件下，可提高衍射透鏡的衍射效率，增大衍射透鏡的數(shù)值孔徑。
關(guān) 鍵 詞 半導(dǎo)體激光器; 衍射理論; 二元菲涅耳衍射透鏡; 準(zhǔn)直; 優(yōu)化設(shè)計(jì)

Abstract In this paper, we bring forth a new optimal design method of fresnel diffractive lens using in light beam collimation of laser diode. By this way we can design high diffraction efficiency, as well as lager numerical aperture diffractive lens under current machine fabrication condition.
Key words laser diode; diffraetive theory; binary Fresnel diffractive lens; light beam collimation; optimal design
半導(dǎo)體激光器由于其體積小、重量輕、功耗低和可直接調(diào)制等優(yōu)點(diǎn)，在激光雷達(dá)、激光通信、固體激光器的抽運(yùn)等方面得到了廣泛的應(yīng)用［1,2］。但半導(dǎo)體激光器也存在出射光束發(fā)散角較大，在垂直和平行于發(fā)光面方向的光束發(fā)散角相差很大，會(huì)形成固有像散的缺點(diǎn)。所以在應(yīng)用半導(dǎo)體激光器時(shí)必須對(duì)其出射光束進(jìn)行消像散、準(zhǔn)直。