Z-сканування з модуляцією рефракції для вимірювання нелінійного показника заломлення

Автор(и)

  • V. Kadan Institute of Physics of the Nat. Acad. of Sci. of Ukraine
  • A. Dmytruk Institute of Physics of the Nat. Acad. of Sci. of Ukraine, Dept. of Physics, Taras Shevchenko National University
  • M. Bondar Institute of Physics of the Nat. Acad. of Sci. of Ukraine
  • I. Dmytruk Institute of Physics of the Nat. Acad. of Sci. of Ukraine
  • A. Goodarzi GUNAM Center for Solar Energy Research and Applications
  • D. Akhtaryarazar Dept. of Physics, Middle East Technical University
  • I. Pavlov Institute of Physics of the Nat. Acad. of Sci. of Ukraine, Dept. of Physics, Middle East Technical University

DOI:

https://doi.org/10.15407/ujpe71.4.275

Ключові слова:

метод Z-сканування, нелiнiйний показник заломлення, коефiцiєнт двофотонного поглинання

Анотація

Представлено новий метод однопроменевого Z-сканування з модуляцiєю показника заломлення, який поєднує елементи стандартних методiв Z-сканування i методу модуляцiї втрат для забезпечення чутливого вимiрювання рефракцiйних нелiнiйностей третього порядку в конфiгурацiї iз закритою дiафрагмою. Порiвняно з оригiнальним методом Z-сканування, запропонований метод забезпечує майже безфоновий сигнал. Отримано аналiтичний вираз, який пов’язує нелiнiйний показник заломлення n2 з потужностями падаючого променя й компонентiв пропущеного променя на першiй i другiй гармонiках модуляцiї; вираз експериментально перевiрено з використанням зразкiв SiO2 та LiF.

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Опубліковано

2026-04-21

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