Optically induced long-period fiber gratings for guided mode conversion in few-mode fibers | Zendy

N. Andermahr | Zendy; Carsten Fallnich | Zendy

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Optically induced long-period fiber gratings for guided mode conversion in few-mode fibers

Author(s) -

N. Andermahr,

Carsten Fallnich

Publication year - 2010

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.18.004411

Subject(s) - optics , grating , materials science , energy conversion efficiency , long period fiber grating , fiber laser , fiber bragg grating , beam (structure) , optical fiber , diffraction grating , graded index fiber , optoelectronics , physics , fiber optic sensor

We propose and demonstrate guided mode conversion by an optically induced long-period fiber grating (OLPG). The beating of two guided modes excited by a nanosecond pulsed laser beam is used to induce a refractive index grating via the Kerr effect. This grating converts a counter-propagating continuous-wave beam from the LP(01) to the LP(11) mode. Numerical simulations using a beam propagation method show that a full conversion is possible. Experimentally, a mode conversion with an efficiency of about 50% is firstly demonstrated.

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