Efforts to obtain more efficient coupling of light from a laser diode to a single mode fiber have continued for various applications such as links for optical fiber communication systems. In TOcan package, configuration of optimized aspherical lens is bi-aspheric and its diameter is 2.4㎜. We designed and fabricated aspherical coupling lens by means of glass molding technique under consideration of glass shrinkage. By controlling the aspherical profile error and surface roughness which were below 90㎚ and 10㎚, respectively, we obtained the low coupling loss, 5.40㏈, which was able to use for coupling a single mode fiber to laser diode.
