Selective mode excitation in hollow-core photonic crystal fiber |
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| Authors: | Galea A D Couny F Coupland S Roberts P J Sabert H Knight J C Birks T A Russell P St J |
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| Institution: | Blazephotonics, Ltd., University of Bath Campus, Claverton Down, Bath BA2 7AY, UK. |
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| Abstract: | Modes are selectively excited by launching light through the cladding from the side into a hollow-core photonic crystal fiber. Measuring the total output power at the end of the fiber as a function of the angle of incidence of the exciting laser beam provides a powerful diagnostic for characterizing the cladding bandgap. Furthermore, various types of modes on either side of the bandgap are excited individually, and their nearfield images are obtained. |
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