An optical waveguide device comprising a free space region, suitably provided by a slab
waveguide, having optical signal ports for coupling to input and output waveguide sections …

The present invention provides an arrayed waveguide such that each waveguide of the
grating has a substantially uniform width, but the width of any single waveguide in the …

An optical filtering and multiplexing Scheme obtains very high Spectral density and
increased maximum transmission distances without costly dispersion compensating equip …

The present invention provides photonic devices utilized in optical telecommunications. The
photonic devices include photoSensitive bulk glass bodies which contain Bragg gratings …

The present invention is directed to a construction of a waveguide format of tuneable optical
filter that is capable of a reasonably fast response. According to the present invention, there …

To modify the longitudinal pitch distribution of a diffraction grating, longitudinal dimensional
variation is imparted, over time, to a support along the entire length of a line on which said …

US6580855B1 - Bandwidth tunable gratings for dynamic dispersion compensation in lightwave -
Google Patents US6580855B1 - Bandwidth tunable gratings for dynamic dispersion …

An optical component comprising an optical waveguide and adjacent to it at least one
grating array adapted to reflect stray light away from said optical waveguide. The use of a …

The present invention provides an arrayed waveguide such that each waveguide of the
grating has a substantially uniform width, but the width of any single waveguide in the …

According to a first aspect, the invention relates to a band pass spectral filter, optimized for
the transmission of an inci dent wave at at least one first given central wavelength wo …