Novel process eases production of hollow-core fiber

[...] the use of thin-walled capillaries means that the cladding structure does not contain enough glass at the vertices of the close-packed array of holes, so previous workers have painstakingly inserted additional material (in the form of fine fibers) into the stack at each interstitial point. A t...

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Bibliographic Details
Published in:Laser focus world 2008-05, Vol.44 (5), p.67
Main Authors: Correa, Rodrigo Amezcua, Knight, Jonathan
Format: Magazinearticle
Language:English
Subjects:
Fibers
Glass
Optics
Online Access:Get full text
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Summary:[...] the use of thin-walled capillaries means that the cladding structure does not contain enough glass at the vertices of the close-packed array of holes, so previous workers have painstakingly inserted additional material (in the form of fine fibers) into the stack at each interstitial point. A tapered hollow-core fiber has been used to efficiently compress and deliver amplified femtosecond pulses from a mode-locked fiber laser as solitons over several meters of fiber (see Fig. 3).4 The transform-limited hollowcore fiber output has been shown to be an efficient pump source for frequencydoubling, resulting in 60% conversion efficiency to the green.5 The recent developments in hollowcore photonic bandgap fiber technology make their production far easier and cheaper as well as bringing them close to one of their natural limits.
ISSN:1043-8092