Abstract

Photochromic liquid-core fibers were fabricated by using benzene or 2-propanol solution of spirobenzopyran. The fiber element consisting of a benzene-solution core and a silica-glass cladding exhibited variable transmittance that was controlled by ultraviolet irradiation. When a visible laser beam (532-nm wavelength) was used as input signal, output signal power increased nonlinearly with input power due to reversed photochromism. This nonlinear input-output characteristic was observed without ultraviolet light,when a fiber was constructed with 2-propanol solution and a polymer-coated glass tube. These experimental results agreed with the theoretical prediction that was based on a simple photochromic fiber model.

© 2003 IEEE

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