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Fiber based polarization filter for radially and azimuthally polarized light

: Jocher, C.; Jauregui, C.; Voigtländer, C.; Stutzki, F.; Nolte, S.; Limpert, J.; Tünnermann, A.

Postprint (987 KByte; PDF; )

Optics Express 19 (2011), Nr.20, S.19582-19590
ISSN: 1094-4087
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IOF ()

We demonstrate a new fiber based concept to filter azimuthally or radially polarized light. This concept is based on the lifting of the modal degeneracy that takes place in high numerical aperture fibers. In such fibers, the radially and azimuthally polarized modes can be spectrally separated using a fiber Bragg grating. As a proof of principle, we filter azimuthally polarized light in a commercially available fiber in which a fiber Bragg grating has been written by a femtosecond pulsed laser.