2018
DOI: 10.17586/2226-1494-2018-18-5-751-757
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Spectral characteristics study of phase-shifted fiber Bragg gratings under pressure applied perpendicular to fiber axis

Abstract: Предмет исследования. Исследовано влияние давления перпендикулярно оси оптического волокна на волоконные брэгговские решетки с фазовым сдвигом. Метод. Запись решеток Брэгга производилась с помощью интерферометра Тальбота, а введение фазового сдвига-с помощью электрической дуги сварочного аппарата. В качестве источника излучения использовалась эксимерная лазерная система. Фиксировалось изменение спектров отражения при различных значениях давления на оптическое волокно. Основные результаты. Получены волоконные б… Show more

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(5 citation statements)
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“…For the fabrication of the transmitting addressed structures with ultra-narrowband transparency windows in their spectra, the following techniques were chosen: the technique involving the spectra overlapping of two identical FBGs [20], the technology based on a stepped phase mask [21], and the method based on changing the geometry of an optical fiber using an electric arc of a welding machine [22]. All three methods use phase masks to record conventional FBGs, and a special mask with a thickness difference of 2300 nm was utilized in [21], using which a phase shift is formed at the place of the mask thickness step.…”
Section: Fabrication Of Transmitting Afbsmentioning
confidence: 99%
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“…For the fabrication of the transmitting addressed structures with ultra-narrowband transparency windows in their spectra, the following techniques were chosen: the technique involving the spectra overlapping of two identical FBGs [20], the technology based on a stepped phase mask [21], and the method based on changing the geometry of an optical fiber using an electric arc of a welding machine [22]. All three methods use phase masks to record conventional FBGs, and a special mask with a thickness difference of 2300 nm was utilized in [21], using which a phase shift is formed at the place of the mask thickness step.…”
Section: Fabrication Of Transmitting Afbsmentioning
confidence: 99%
“…For more accurate control of the shift value, the scheme can use a Michelson interferometer based on bulk optical elements [20]. Then, in accordance with the technique presented in [22], the fiber is displaced by a distance equal to the first 2π-FBG length (L1) and the distance between the gratings (∆l), after which the second 2π-FBG with the length L2 ≠ L1 is recorded using the technology [20]. Since the recording conditions remain unchanged, the characteristics of both 2π-FBGs will be basically the same, except for a slight difference in the bandwidth of their spectra.…”
Section: Fabrication Of Transmitting Afbsmentioning
confidence: 99%
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