| 摘要 |
A Bragg grating filter (10) is provided for use in an optical fiber (12) of an optical fiber system. The optical fiber includes a core (14) and a cladding (16). A plurality of Bragg grating segments are formed into the core of the optical fiber. Each grating element is defined by periodic variations in the refractive index. The period variations in the refractive index have a spatially asymmetric index of modulation, such that dispersion of the reflection at one end of the grating element can be decreased at the expense of increased dispersion of reflection at the other end of the grating element.
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