Abstract

We consider large-mode-area photonic crystal fibers for visible applications in which microdeformation-induced attenuation becomes a potential problem when the effective area Aeff is sufficiently large compared to λ2. We argue that a slight increase in fiber diameter D can be used in screening the high-frequency components of the microdeformation spectrum mechanically, and we confirm this experimentally for both 15- and 20µm core fibers. For typical bending radii R16 cm the operating bandwidth increases by approximately 3–400 nm to the low-wavelength side.

© 2003 Optical Society of America

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