Abstract

Optical-fiber modules are now attractive devices in the information society for their high-speed, low-noise, and mass transmission capabilities. Specifically, lower cost and more compact modules are in great demand for short-haul transmissions and fiber-to-the-home applications. For such purposes, a multimode fiber module using an IR light-emitting diode is the first candidate, but this module is still expensive and is not as compact as others. To realize a fiber module that is lower in cost and more compact, we describe a single-mode fiber module using a single, micro Fresnel lens (MFL) and a compact disc 0.78-μm semiconductor laser. A MFL is an attractive optical device because of its thin, planar structure, low cost, easy mass production capabilities, and easy integration with other optical components.¹ We have developed compact sensors, light sources, etc. by using the MFL.²

© 1991 Optical Society of America