Composite wavelength tunable wedged interference structures with increased free spectral range 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Optical and Quantum Electronics
年/卷/期
2018 / 50 / 12
ISSN号
0306-8919
作者单位
Tech Univ Sofia, Plovdiv Branch, Optoelect & Laser Engn Dept, 25 Tsanko Diustabanov Str, Plovdiv 4000, Bulgaria;Bulgarian Acad Sci, Inst Opt Mat & Technol, Bl 109, BU-1113 Sofia, Bulgaria;Tech Univ Sofia, Plovdiv Branch, Optoelect & Laser Engn Dept, 25 Tsanko Diustabanov Str, Plovdiv 4000, Bulgaria;
作者
Nenchev, Marin;Stoykova, Elena;Deneva, Margarita;
摘要
In the present paper, we propose a compact composite wedge interference structure by combining wedges with different geometry. We use interferential wedges with optical thickness from several micrometers to several hundred micrometers and apex angles of the order of tens microradians. The aim of the conducted study is to prove that such a structure exhibits improved optical properties in comparison to a conventional wedge. We have carried out simulations and experiments with a structure built from two wedges. We have shown that, instead of multiple transmission peaks observed for a single interferential wedge, the composite structure provides selection of a single resonance in transmission within the impact area of a large diameter monochromatic beam and enables wavelength tuning when a small diameter multi-wavelength beam is used. The first property ensures analysis of light beams characterized with a wide spectrum. The second feature allows for increase of the wavelegth tuning range at keeping spectrally narrow transmission peak if the structure is formed by a thin and a thick interferential wedges. Two such structures have been realized using a technique which we have developed. The experiments made with this structures show that the produced transmission peak is narrowed spatially and spectrally at the expense of lower transmission which achieves 50-60% of transmission ensured by the used interferential wedges.
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关键词/主题词
Interferential wedge;Fizeau wedge;Optical elements;Interference;
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