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Ultrashort pulse-induced nanogratings: Temperature stable optically active phase elements

: Zimmermann, F.; Richter, S.; Vetter, C.; Döring, S.; Tünnermann, A.; Nolte, S.


Institute of Electrical and Electronics Engineers -IEEE-:
Conference on Lasers and Electro-Optics Europe & International Quantum Electronics Conference, CLEO®/Europe-IQEC 2013 : 12-16 May 2013, Munich, Germany
Piscataway, NJ: IEEE, 2013
ISBN: 978-1-4799-0593-5 (Print)
ISBN: 978-1-4799-0594-2
1 pp.
Conference on Lasers and Electro-Optics (CLEO Europe) <2013, Munich>
International Quantum Electronics Conference (IQEC) <2013, Munich>
Conference Paper
Fraunhofer IOF ()

We present femtosecond direct written optical components exhibiting circular birefringence. Based on tightly focused ultrashort laser pulses in the bulk of fused silica, self-organized modifications, so called nanogratings can be induced [1]. Due to their anisotropic structure and sub-wavelength periodicity, these nanogratings show a strong form-birefringence. Emerging after several laser pulses they are always oriented perpendicular to the laser polarization. So by combing the tunable orientation of the nanogratings with the outstating three-dimensional writing ability allows for the fabrication of almost arbitrary phase elements [2,3].