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AssigneeAston Photonic Technologies Ltd.
InventorsCatherine Anne Sugden, Xuewen Shu, Lee Ann Kennedy, Kevin Christopher Byron
Estimating the term…
A first embodiment of the invention provides a Gires-Tournois etalon (DGTE) 20 comprising a cladding mode suppressed optical fibre 22, including an etalon section 24 in which a weakly reflective optical waveguide grating 26 and a strongly reflective optical waveguide grating 28 are provided. The two gratings 26, 28 are chirped fibre Bragg gratings (FBGs). The chirped FBGs 26, 28 are arranged to together define an etalon cavity. Another aspect of the invention provides a dispersion compensator 60 comprising two DGTEs 62, 64 according to the first embodiment of the invention The DGTEs 62, 64 have a linearly varying dispersion over a selected optical bandwidth. The first DGTE 62 has a positive dispersion slope and the second DGTE 64 has a negative dispersion slope. The magnitudes of the dispersion slopes of the two DGTEs 62, 64 are substantially equal, so that the dispersion compensator 60 has a constant dispersion across the selected bandwidth. The DGTEs 62, 64 are optically coupled to one another via a four-port optical circulator 66.
A Gires-Tournois etalon comprising:
An etalon as claimed in any preceding claim, wherein the Gires-Tournois etalon further comprises one or more tuning means to which one or more of the optical waveguide gratings are coupled, the tuning means being operable to alter the periodicity of a grating, thereby changing the dispersion characteristics of the etalon.
An etalon as claimed in any preceding claim, wherein the optical waveguide is an optical fibre or a planar optical waveguide.
A Gires-Tournois etalon comprising:
A dispersion compensator comprising;
A dispersion compensator comprising:
Dependencies are inferred from the claim text.