Abstract

A design method for hollow optical fibers is shown that has a dielectric cover film loaded on the inner metal coating to obtain flexible fiberoptics transmitting a wide wavelength range in THz region with low loss. Spectral losses of fibers that are fabricated by two different methods are measured by using a broadband THz source. The loss of a fiber with an inner diameter of 3mm was 1.3dBm at the wavelength of 200μm, and the losses were lower than 3dB in the wavelength region from 150μmto>250μm. Because these fibers are flexible, robust, and highly efficient in a wide wavelength range, they are useful in remote THz spectroscopy.

© 2008 Optical Society of America

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