Jpn. J. Appl. Phys. 46 (2007) pp. 5172-5177  |Previous Article| |Next Article|  |Table of Contents|
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Comparative Study of Direct Image Transmission through Various Optical Fibers Using the Phase-Conjugate Wave

Kenta Ito and Jun-ichi Sakai

(Received January 22, 2007; accepted April 19, 2007; published online August 6, 2007)

In this article, we compare direct image transmissions through various multimode optical fibers, namely, step-index silica, graded-index silica, and step-index plastic fibers. We make use of a round-trip transmission in the optical fiber as well as a phase-conjugate wave generated by a self-pumped BaTiO₃ crystal to recover a distorted image. The image was best recovered for a step-index silica fiber with a core diameter of 50 µm and NA=0.18 among three types of 1-m-long silica fibers. Step-index silica and plastic fibers with a length of 1 m could transmit an optical image up to a spatial resolution of 20 line pairs/mm. We successfully recovered a distorted image even after transmission over a 35.5-m-long step-index silica fiber. It is revealed that NA as well as core diameter is an important factor for increasing the image quality in direct image transmission.

URL: http://jjap.jsap.jp/link?JJAP/46/5172/
DOI: 10.1143/JJAP.46.5172

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