Optica, Optics Letters, 11(32), p. 1575, 2007
DOI: 10.1364/ol.32.001575
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A focused ion beam is used to mill side holes in air-silica structured fibers. By way of example, side holes are introduced in two types of air-structured fiber, (1) a photonic crystal four-ring fiber and (2) a six-hole single-ring step-index structured fiber.