Sapphire shaped crystals for waveguiding, sensing and exposure applications

Katyba, Gleb M.; Zaytsev, Kirill I.; Dolganova, Irina N.; Shikunova, Irina A.; Chernomyrdin, Nikita V.; Yurchenko, Stanislav O.; Komandin, G. A.; Reshetov, Igor V.; Nesvizhevsky, V. V.; Курлов, В. Н.

doi:10.1016/j.pcrysgrow.2018.10.002

Cited by 80 publications

(50 citation statements)

References 175 publications

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“…Во втором случаедатчик используется как отдельный инструмент, вводимый в свободный носовой канал, что дает возможность опционального использования датчика в процессе операции. Перспективным направлением для создания многофункциональных, технологичных и экономичных инструментов для нейрохирургии является разработка волноводов на основе кристаллов сапфира заданной формы [42].…”

Section: Discussionunclassified

Исследование Нейроваскулярных Структур С Помощью Фазово-Модуляционной Спектрофотометрии-=sup=-*-=/Sup=-

Сафонова¹,

Орлова²,

Шкарубо³

2019

Журнал Технической Физики

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The possibility of using phase modulation spectrophotometry for the detection and recognition of large blood vessels and nerves in the biological tissues volume in the tasks of neurosurgery with endoscopic endonasal access while removing the skull base tumors has been investigated. Optical and dynamic characteristics of various neurovascular structures types were studied. Informative independent parameters and their corresponding criteria for the detection and recognition of neurovascular structures in the tissue volume, based on the difference in the optical properties of the blood, nerves and their surrounding tissues, was proposed and experimentally investigated in vivo and in situ. The obtained preliminary results indicate the promise of applying the method of phase modulation spectrophotometry in endoscopic neurosurgery and can be used in spectrophotometry with the impulse time-domain approach.

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Section: Discussionunclassified

Исследование Нейроваскулярных Структур С Помощью Фазово-Модуляционной Спектрофотометрии-=sup=-*-=/Sup=-

Сафонова¹,

Орлова²,

Шкарубо³

2019

Журнал Технической Физики

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“…EFG Growth of Sapphire Fibers and Fiber Bundle Assembling: Sapphire fibers were fabricated using an in-house experimental setup for the shaped crystals growth (EFG method) enhanced by the original technique of the in situ crystal weight monitoring. [35][36][37] The EFGtechnique enabled fabrication of sapphire shaped crystals with complex pre-determined cross section geometries, as well as with high as-grown quality of the crystal surface and volume. Such crystals allow solving numerous demanding problems in optics and photonics.…”

Section: Methodsmentioning

confidence: 99%

“…Such crystals allow solving numerous demanding problems in optics and photonics. [35] Since sapphire is transparent both in the THz range and in the visible, the EFG-grown sapphire crystals presented a viable material's platform for THz optics [38][39][40][41] supplemented by alignment convenience when using standard visible light sources.…”

Section: Methodsmentioning

confidence: 99%

“…In this work, sapphire fibers are fabricated using the edge-defined film-fed growth (EFG)-technique of shaped crystals growth, aided by the original approach of the in situ crystal weight monitoring. [35][36][37] In Figure 2a we present the EFG-setup used for the fabrication of circular sapphire fibers with the diameters of 175−325 µm and the lengths of ≈50 cm. The fibers are grown using the methodology and equipment, that was previously applied for the one-step fabrication of the hollow-core sapphire microstructured THz waveguides, as well as flexible sapphire fibers detailed in refs.…”

Section: Fabrication Of the Sapphire Fiber Bundlesmentioning

confidence: 99%

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Overcoming the Abbe Diffraction Limit Using a Bundle of Metal‐Coated High‐Refractive‐Index Sapphire Optical Fibers

Zaytsev

Katyba

Chernomyrdin

et al. 2020

Advanced Optical Materials

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While fiber bundles attract much interest in optics, their resolution is limited by the individual fiber size, which can be as large as a wavelength λ for common fiber optics materials. In order to increase fiber bundle resolution, in this work, high‐refractive‐index sapphire fibers with n > 3 are employed in the terahertz (THz) range, which ensures strong confinement of the guided modes and enables a fiber bundle resolution beyond the 0.62λ Abbe limit of free space optics. A sapphire fiber bundle is fabricated and its advanced resolution is experimentally demonstrated, using both analysis of the pair correlation function of the disordered fiber packing and continuous‐wave THz imaging. The resolution vares across the aperture with the mean value of 0.53λ, while, at certain regions of the bundle, it is as low as 0.3λ. The developed principles can be translated to any spectral range where high‐refractive‐index fiber optics materials are available.

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“…− отсутствие как волноводов, так и волокон для доставки ТГц излучения к труднодоступным органам и тканям [17][18][19];…”

Section: Introductionunclassified

Оптические Свойства Гиперосмотических Агентов Для Иммерсионного Просветления Тканей В Терагерцовом Диапазоне

Мусина¹,

Гавдуш²,

Черномырдин³

et al. 2020

Журнал Технической Физики

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The transmission spectra of the most common hyperosmotic agents, such as pure glycerol, propylene glycol (PG), dimethyl sulfoxide (DMSO), polyethylene glycol (PEG) with 200, 300, 400 and 600 Da molecular weights, and their aqueous solutions, as well as aqueous solutions of sucrose, glucose, fructose, dextran 40 and 70 were measured. The experiments were carried out using a THz pulsed spectrometer with a vacuum measuring compartment to reduce the effect of water vapor on spectral measurements. The dielectric properties of hyperosmotic agents were restored in the spectral range from 0.1 to 2.5 THz and the dependence of the amplitude absorption coefficient on the concentration of considered agents at 0.5 THz frequency was constructed. The obtained results make it possible to choose the optimal agents for immersion optical clearing in the THz range.

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Sapphire shaped crystals for waveguiding, sensing and exposure applications

Cited by 80 publications

References 175 publications

Исследование Нейроваскулярных Структур С Помощью Фазово-Модуляционной Спектрофотометрии-=sup=-*-=/Sup=-

Исследование Нейроваскулярных Структур С Помощью Фазово-Модуляционной Спектрофотометрии-=sup=-*-=/Sup=-

Overcoming the Abbe Diffraction Limit Using a Bundle of Metal‐Coated High‐Refractive‐Index Sapphire Optical Fibers

Оптические Свойства Гиперосмотических Агентов Для Иммерсионного Просветления Тканей В Терагерцовом Диапазоне

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