Planar lens devices by CVD process

A novel technique for splitting optical signals using planar refractive lenses is proposed. The concept of the planar lens in dielectric films for the fabrication of thin film 1×N couplers is described. The advantages of this approach for fabricational tolerances, pigtailing, and packaging are described, and the performance of the devices, made by the CVD process is analysed. Experimental results on 1×2 and 1×8 devices using this approach are presented. Very good output spot characteristics and insertion loss values have been obtained, and a number of functional, pigtailing, and packaging advantages have been identified