【摘要】 根据808 nm大功率半导体激光列阵(LDA)的远场光场的分布特点,利用多模光纤柱透镜和光束转换装置对808 nm半导体激光列阵的发散角进行压缩整形,通过聚焦准直透镜将激光束耦合进入芯径为400μm的光纤,实现了30W的功率输出,其中最大耦合效率大于80%,光纤的数值孔径(NA)为0.22。通过分析其输出光斑和输出曲线,表明LDA与光纤耦合系统不仅从各个方向同时压缩了激光束的发散角,有效地实现了对激光束的整形、压缩,而且性能稳定,可靠实用。更多还原

【Abstract】 High output power was achieved by using the coupling technique of a laser diode array(LDA) and a micro-lensed fiber.The micro-lensed fiber was fabricated by fusing technology with the fiber core of the diameter of 400 μm.The divergence of the laser beam from all directions was greatly compressed by the design of two cylindrical lenses and a beam transfer set.By a fusing lens,the laser beam was coupled into a micro-lensed fiber,and a very efficient beam shaper was achieved.Finally,high output power of 30 W of the coupled LDA was obtained and the maximal coupling efficiency was more than 80% with the numeral aperture(NA) of 0.22.更多还原