| 摘要 |
The invention is related to an optical waveguide device comprising a length of fiber including a monomode core having a refraction index of nco, a photosensitivity of Sco and a radius Rco and an internal cladding with an refractive index of ncl, a photosensitivity of Scl and 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 theta written in core and inner cladding of the optical waveguide, coupling the fundamental mode into several cladding modes p1 where Rco<=2.5 Rco and the Sco<=Scl
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