Abstract
Poled glass is an attractive material for nonlinear optics applications.1 The low second-order nonlinearity achieved so far represents the main drawback of this technology, but efficient quasiphase-matching in periodically poled silica fibres would compensate for this limitation2 and lead to devices such as wavelength converters for wavelength-division-multiplexer re-routing and switching, and frequency doubling in lasers. Various techniques have been used for quasi-phase- matched grating fabrication including periodical electrodes, periodic UV-erasure or erasure by exposure to a femtosecond laser beam.3
© 2002 Optical Society of America
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