Structural modification in gratings inscribed point-by-point by a femtosecond laser is investigated using quantitative phase microscopy. The gratings present a central region with a depressed refractive index surrounded by an outer corona with increased index.
© 2006 Optical Society of America
(320.0320) Ultrafast optics : Ultrafast optics
(320.2250) Ultrafast optics : Femtosecond phenomena
(350.0350) Other areas of optics : Other areas of optics
(350.2770) Other areas of optics : Gratings
A. Martinez, M. Dubov, I. Khrushchev, and I. Bennion, "Structure of Fiber Gratings Directly Written by Infrared Femtosecond Laser," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2006), paper JTuD13.
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