Пространственные и временные характеристики четырехволнового преобразователя излучения в параболическом волноводе с резонансной нелинейностью

Пространственные и временные характеристики четырехволнового преобразователя излучения в параболическом волноводе с резонансной нелинейностью

Автор: Воробьева Елена Владимировна, Ивахник Валерий Владимирович, Капизов Дархан Рахметулович

Журнал: Компьютерная оптика @computer-optics

Рубрика: Дифракционная оптика, оптические технологии

Статья в выпуске: 1 т.47, 2023 года.

Бесплатный доступ

С использованием функции временного отклика, функции размытия точки проанализированы пространственные и временные характеристики вырожденного четырехволнового преобразователя в многомодовом волноводе с резонансной нелинейностью. Для четырехволнового преобразователя при условии одномодовых с равными номерами мод волнами накачки получены зависимости ширины временного отклика от номера моды объектной волны, интенсивности первой волны накачки, длины волновода. Показано, что наибольший вклад в амплитуду объектной волны обусловлен модой волновода, номер которой совпадает с номерами мод одномодовых волн накачки. Для стационарного режима учет пространственной структуры гауссовой волны накачки приводит с уменьшением ширины пучка накачки к монотонному уменьшению с последующим выходом на постоянное значение полуширины модуля функции размытия точки. При одномодовых волнах накачки с равными номерами мод с увеличением номера моды волн накачки наблюдается перераспределение энергии, сосредоточенной в побочных максимумах изображения точечного сигнала, улучшение качества обращения волнового фронта.

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Четырехволновой преобразователь излучения, параболический волновод, резонансная нелинейность, функция размытия точки, временной отклик

Короткий адрес: https://sciup.org/140296258

IDR: 140296258   |   DOI: 10.18287/2412-6179-CO-1199

Список литературы Пространственные и временные характеристики четырехволнового преобразователя излучения в параболическом волноводе с резонансной нелинейностью

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