Abstract
An optical fibre having a periodicidal cladding structure provididing a photonic band gap structure with superior qualities. The periodical structure being one wherein high index areas are defined and wherein these are separated using a number of methods. One such method is the introduction of additional low index elements, another method is providing elongated elements deformed in relation to a circular cross section. Also described is a cladding structure comprising elongated elements of a material having an index of refraction higher than that of the material adjacent thereto. Using this additional material, prior art structures may obtain much better qualities.
| Original language | English |
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| Patent number | WO1999064904 |
| Filing date | 16/12/1999 |
| Country/Territory | International Bureau of the World Intellectual Property Organization (WIPO) |
| Publication status | Published - 1999 |