A comparative study of spliced optical fibers

• Published in: Optics and lasers in engineering 2004-02, Vol.41 (2), p.277-287
• Main Authors: El Ghandoor, H., Nasser, I., Abdel-Hady, Afaf, Al-Shukri, A.
• Format: Article
• Language: English
• Subjects: Applied sciences; Circuit properties; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Fabrication, cladding, and splicing; Fiber optics; Fiber testing and measurement of fiber parameters; Fundamental areas of phenomenology (including applications); Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Integrated optics. Optical fibers and wave guides; Interference; Interferometers; Interferometry; Laser sheet; Optical and optoelectronic circuits; Optical instruments, equipment and techniques; Optics; Phase shifting interferometry; Physics; Wave optics
• ISSN: 0143-8166; 1873-0302
• DOI: 10.1016/S0143-8166(02)00200-2

A fusion-spliced optical fiber is examined with a laser sheet of light. A CCD camera is used to record the transverse interference pattern from the fiber. The buckling on the fiber material in one direction of the spliced point is distinct inside the transverse interference pattern. The refractive index profile inside the fiber core, obtained at different illumination directions, is calculated using a new method showing the change in the refractive index due to fusion splicing of the fiber. A simple theoretical model is introduced to simulate the anomalous behavior in the transverse interference fringes due to a slight change of the optical parameters.