G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 5/18 (2006.01) C03B 37/012 (2006.01) G02B 5/26 (2006.01) H04B 10/18 (2006.01) G02B 6/34 (2006.01)
Patent
CA 2331914
The present invention is predicated on applicants' discovery that an appropriately spaced and dimensioned internal gap cladding can substantially reduce short wavelength cladding mode loss in a fiber Bragg grating. A fiber Bragg grating is provided with a ring of closely spaced, longitudinally extending gap regions in the glass peripherally surrounding the core. The gaps are spaced apart by thin glass webs having a thickness less than a wavelength of the light being transmitted and are disposed peripherally about the core at a distance of 2-10 wavelengths from the core center. The thin webs limit the passage of the light between the gaps. The combination of webs and gaps acts as an internal thin cladding which supports fewer cladding modes than conventional glass cladding and, significantly, provides increased wavelength spacing between the Bragg resonance and the first cladding made resonance.
Burdge Geoffrey L.
Eggleton Benjamin John
Strasser Thomas Andrew
Westbrook Paul Stephen
Windeler Robert Scott
Kirby Eades Gale Baker
Lucent Technologies Inc.
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