The development of optical fiber communication systems has required passive devices of flexible characteristics. Recently, controllable long-period fiber gratings (LPFGs) devices have been demonstrated using liquid crystals (LCs), where the nematic director of the LC is electrically controlled. The LC material can be placed either in a core or cladding region. The optical characteristics of the LC depend on the orientation of the director because the director, i.e., the optic-axis direction of the LC, determines the effective index for the light transmission. These can be utilized as dynamic-gain-flattening filters in broadband amplifier modules and as controllable polarization-dependent loss (PDL) compensators. In this paper, we present the electrical modulation of an etched LPFG with a liquid-crystal cladding, in which the controllability and the stability of the LC-cladding LPFG are improved by reducing the diameter of the optical fiber to 50 /spl mu/m by means of chemical etching.


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    Title :

    Electrical modulation of an etched long-period fiber grating with a liquid-crystal cladding


    Contributors:


    Publication date :

    2001-01-01


    Size :

    201936 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English





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