Abstract
Pumping a nonlinear germanosilicate fiber with intense near-infrared femtosecond laser pulses for supercontinuum generation may invoke multiphoton-assisted photosensitivity of glasses to write a long-period fiber grating. In sharp contrast to the spontaneous formation of a Hill grating that resonates with the writing wavelength through first-order diffraction, the long-period fiber grating resonates with the writing wavelength through second-order diffraction. This finding highlights the surprising light-matter interaction in a waveguide.
Original language | English (US) |
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Article number | 121104 |
Journal | Applied Physics Letters |
Volume | 97 |
Issue number | 12 |
DOIs | |
State | Published - Sep 20 2010 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)