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Особенности нелинейно-оптических преобразований фемтосекундных лазерных импульсов в микроструктурированных волокнах из стекла AR-Glass

Особенности нелинейно-оптических преобразований фемтосекундных лазерных импульсов в микроструктурированных волокнах из стекла AR-Glass

Abstract

The optical fibres with a continuous core of a diameter a little micron and microstructured environment on extend technology of the softened glass of the stamp AR-Glass (Schott) are made. The measurements of spectra femtosecond of pulses Ti:sapphire of the laser on an output of the given fibres are carried out depending on geometrical parameters of structure of cross section of fibres. On the basis of the qualitative analysis of experimental curve spectral distribution of radiation is shown, that the nonlinear-optical transformation of a spectrum of pulses is observed already at a diameter of a core 6mkm and there is a generation of additional spectral components. At reduction of geometrical parameters of structure of cross section anti-Stokes the component of a spectrum is moved together from infra-red in seen area. Is shown, that in a case of hit of entrance radiation in one of lateral channels of a environment, alongside with the basic line of generation of a source in a spectrum occurs brightly expressed anti-Stokes of a component with central length of a wave about 612nm and intensity, commensurable from that basic line. On the basis of the mode analysis of structure femtosecond of pulses of radiation on an output of a fibre, is marked, that along-side with the basic style maximum are observed also waveguide of a style.

Изготовлены оптические волокна со сплошной сердцевиной диаметра несколько микрон и микроструктурированной оболочкой по технологии перетяжки размягчённого стекла марки AR-Glass (Schott). Проведены измерения спектров фемтосекундных импульсов Ti: сапфирового лазера на выходе данных волокон в зависимости от геометрических параметров структуры поперечного сечения волокон. На основе качественного анализа эксперимен-тальных кривых спектрального распределения излучения показано, что нелинейно-оптическая трансформация спектра импульсов наблюдается уже при диаметре сердцевины 6 мкм и происходит генерация дополнительных спектральных составляющих. При уменьшении геометрических параметров структуры поперечного сечения антистоксовая составляющая спектра сдвигается от инфракрасной в видимую область. Показано, что в случае фокусировки входного излучения в один из боковых каналов МС-оболочки, наряду с основной линией генерации источника в спектре, появляется ярко выраженная антистоксовая компонента с центральной длиной волны порядка 612 нм и интенсивностью, соизмеримой с таковой основной линии. На основе анализа модового состава фемтосекундных импульсов излучения показано, что на выходе волокна, наряду с основной модой, наблюдаются и высшие волноводные моды.

Keywords

ФЕМТОСЕКУНДНЫЕ ЛАЗЕРНЫЕ ИМПУЛЬСЫ, МИКРОСТРУКТУРИРОВАННЫЕ ВОЛОКНА, НЕЛИНЕЙНАЯ ОПТИКА, ГЕНЕРАЦИЯ СУПЕРКОНТИНУУМА

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold