Stabilization Of Transmission Function: Theory For An Ultrathin Endoscope Of One Multimode Fiber

    Authors

    M. A. Bolshtyansky;B. Y. Zeldovich

    Comments

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    Abbreviated Journal Title

    Appl. Optics

    Keywords

    WAVE-GUIDES; Optics

    Abstract

    Propagation of a monochromatic light through a multimode fiber is considered in connection with the problem of image transmission. We discuss the variations of throughput scrambling, i.e., of the pixel-to-pixel Greens' function for transmission under the bends of the fiber axis. Two main statements are elaborated theoretically, which in principle allow the stabilization of the throughput scrambling. First, if the deformations are smooth enough, the modes are adiabatically modified without intermixing. Second, the variation delta phi(m,n) of the phase of a mode M-m,M-n can be expressed as a power series in a small parameter (rho/R)(2) where rho is the core radius and R-1 is the curvature of bending. A scheme for the compensation of those phase shifts is suggested based on prebending of the fiber with subsequent controllable adjustment of that prebending. (C) 1997 Optical Society of America.

    Journal Title

    Applied Optics

    Volume

    36

    Issue/Number

    16

    Publication Date

    1-1-1997

    Document Type

    Article

    Language

    English

    First Page

    3673

    Last Page

    3681

    WOS Identifier

    WOS:A1997XB71000011

    ISSN

    0003-6935

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