Vol. 41, Issue 2, pp. 367-373
Keywords
gradient index lens, singlemode fiber, multimode fiber, optical power density distribution, beam diameter
Abstract
In the work presented below it has been demonstrated that the section of the multimode fiber with gradient refractive index distribution in the core spliced to a singlemode fiber modifies the path of rays in a manner analogous to the GRIN type lens. Using a small section of graded-index optical fiber as a lens provides several advantages, including: small size, well matched fiber-lens diameter, stable fiber-lens interface, and a comparatively low cost of fabrication of an elementary fiber lens. The aim of the present paper is to discuss the technological process that enables fabrication of elementary fiber lenses with different lengths, and the measurement system for analysis of optical power density distribution in the light beam modified by an elementary fiber lens.