Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-03-29
2005-03-29
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Input/output coupler
C385S125000, C385S010000, C385S040000
Reexamination Certificate
active
06873765
ABSTRACT:
A tuneable optical fibre comprising a long-period Bragg grating (5) written in a portion of an optical waveguide (10) comprising a core and an optical cladding (11), characterised in that the portion of the waveguide comprising the grating (5) is at least partially immersed in an external environment consisting of two distinct sections, a first section (1) whose refractive index is higher than that of the optical cladding (11) and a second section (2) whose refractive index is lower than that of the optical cladding (11), the long-period grating being at least partially immersed in one of the said sections so as to almost independently tune the wavelength and/or the contrast of the spectral response of the filter.
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Yin S et al.: “A Novel All-Optic Tunable Long-Period Grating Using a Unique Double-Cladding Layer” Optics Communications, North -Holland Publishing Co. Amsterdam. NL, vol. 196. No. 196. Sep. 1, 2001, pp. 181-186, XP004300744.
Khaliq S et al: “Fiber-Optic Liquid -Level Sensor Using a Long-period Grating” Optics Letters, Optical Society of America. Washington, US, vol. 26, No. 16, Aug. 15, 2001, pp. 1224-1226. XP001110595.
Bonnet Xavier
De Barros Carlos
Guerin Jean-Jacques
Labidi Hedi
Loury Hervé
Avanex Corporation
Font Frank G.
Kianni K. Cyrus
Moser, Patterson & Sheridan L.L.P.
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