Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Reexamination Certificate
2006-04-25
2006-04-25
Williams, Joseph (Department: 2879)
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
C385S142000
Reexamination Certificate
active
07035515
ABSTRACT:
The invention is related to an optical waveguide device comprisinga length of fiber including a monomode core having a refraction index of nco, a photosensitivity of Scoand a radius Rcoand an internal cladding with an refractive index of ncl, a photosensitivity of Scland a radius of Rcl,and a outer cladding surrounding the internal cladding with an refractive index that allows the existence of multiple cladding modes,and a slanted Bragg grating with an effective tilt angle of θ written in core and inner cladding of the optical waveguide, coupling the fundamental mode into several cladding modeswhere Rcl≦2.5 Rcoand the Sco≦Scl.
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Hewlett S J et al.: “Coupling Characteristics of Photo-Induced Bragg Gratings in Depressed- and Matched- Cladding Fibre” Optical and Quantum Electronics, Chapman and Hall, London, GB, vol. 28, No. 11, Nov. 1, 1996, pp. 1641-1654, XP002072666).
De Barros Carlos
Riant Isabelle
Avonex Corporation
Dong Dalei
Patterson & Sheridan
Williams Joseph
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