| http://www.w3.org/ns/prov#value | - The fiber 830 may be doped or loaded with any dopant now known or later discovered that allows the fiber to exhibit the necessary level of photosensitivity for the incident radiation (e.g., UV or other actinic radiation) used for writing the grating 12, such as, hydrogen, deuterium, boron, germanium, lead, or other dopants that provide photosensitivity, some of which are described in Patent Nos.:
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