Symmetrical waveguide devices fabricated by direct UV writing

Kjartan Ullitz Færch, Mikael Svalgaard

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Power splitters and directional couplers fabricated by direct UV writing in index matched silica-on-silicon samples can suffer from an asymmetrical device performance, even though the UV writing is carried out in a symmetrical fashion. This effect originates from a reduced photosensitivity in the vicinity of previous exposed areas. The imbalance can be counteracted by an appropriate reduction of the applied scan velocity in areas, where a previous scan has been carried out nearby
Original languageEnglish
JournalI E E E Photonics Technology Letters
Issue number2
Pages (from-to)173-175
Publication statusPublished - 2002

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