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Fs laser induced apodised Bragg waveguides in fused silica

: Voigtländer, C.; Zeil, P.; Thomas, J.; Ams, M.; Williams, R.J.; Withford, M.J.; Tünnermann, A.; Nolte, S.


Heisterkamp, A. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XI : SPIE Photonics West, 22.-26.1.2011, San Francisco, California, USA
Bellingham, WA: SPIE, 2011 (Proceedings of SPIE 7925)
ISBN: 978-0-8194-8462-8
Paper 79250Y
Conference "Frontiers in Ultrafast Optics - Biomedical, Scientific, and Industrial Applications" <11, 2011, San Francisco/Calif.>
Conference Paper
Fraunhofer IOF ()
ultrafast laser processing; apodised waveguide Bragg gratings; burst technique

We present apodised Bragg waveguides inscribed in fused silica using a high repetition rate fs laser system. By varying the modulation with a pulse picker, the mean refractive index over the grating length could be kept constant, while the grating strength is varied. Thus, Bragg waveguides with zero crossing Gaussian modulation profile could be demonstrated. The side-lobes were suppressed by about 10 dB compared to a uniform grating.