Increase of the free-spectral range by composing a structure from wavelength tunable wedged interferometers 机翻标题: 暂无翻译,请尝试点击翻译按钮。

会议集名/来源
Optical Sensing and Detection V: SPIE Photonics Europe Conference, 23-26 April 2018, Strasbourg, France
出版年
2018
页码
106801K.1-106801K.8
会议地点
Strasbourg
作者单位
Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, Acad. G. Bonchev, Bl. 109, 1113 Sofia, BulgariaTechnical University -Sofia and Plovdiv Branch, QOEL-Scientific Laboratory and Department of Laser Engineering, Sofia and Plovdiv, BulgariaTechnical University -Sofia and Plovdiv Branch, QOEL-Scientific Laboratory and Department of Laser Engineering, Sofia and Plovdiv, Bulgaria
作者
Elena Stoykova;Marin Nenchev;Margarita Deneva
摘要
We have studied a structure composed from two wavelength tunable wedged interferometers and proved its potential for providing an increased free spectral range in comparison to a conventional interferential wedge. The interferential wedges with optical thickness from several micrometers to several hundred micrometers and apex angles of the order of tens microradians have been used. We have computed transmission for a monochromatic light beam with arbitrary wavefront using the angular spectrum approach for interferential wedges with different optical thicknesses and apex angles. We have conducted experiments with several stacks formed from different two wedges. Thus, we have confirmed selection of a single transmission resonance within the impact area of a large diameter beam instead of occurrence of multiple transmission peaks observed for a single interferential wedge. The stack enables wavelength tuning for a small diameter multi-wavelength beam in an increased spectral range at keeping high spectral resolution if the structure is formed by a thin and a thick interferential wedges. The experiments have shown that the selected transmission peak is narrowed spatially and spectrally at the expense of lower transmission, which is 50-60% of transmission provided by the used interferential wedges.
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关键词
Interferential wedge;Fizeau wedge;optical elements;interference;spectral analysis;tuning
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