Mode decomposition of Kerr self-cleaned beams by phase only SLM

Результат исследования: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

Graded-index multimode optical fibers have recently attracted a renewed attention, thanks to the discovery of new nonlinear effects, such as Kerr beam self-cleaning. In essence, Kerr self-cleaning involves a flow of the propagating beam energy into the fundamental mode of the fiber, accompanied by a redistribution of the remaining energy among high-order modes. Increasing the fundamental mode energy leads to a significant improvement of the output beam quality. A standard method to determine beam quality is to measure the M2 parameter. However, since self-cleaning involves the nonlinear redistribution of energy among a large number of fiber modes, measuring a single beam quality parameter is not sufficient to characterize the effect. A properly informative approach requires performing the mode decomposition of the output beam. Mode decomposition permits to evaluate the energy distribution among all of the excited fiber modes, which enables investigations of nonlinear mode coupling processes at a qualitatively new level. In this work, we demonstrate an efficiency mode decomposition method based on holography, which is suitable for analyzing the self-cleaning effect. In a theoretical study, we describe the solution of the mode decomposition problem for the modes of the graded-index multimode fiber. In an experimental investigation, we demonstrate the decomposition of both low-power (speckled) and self-cleaned beams, involving more than 80 modes.

Язык оригиналаанглийский
Название основной публикацииReal-time Measurements, Rogue Phenomena, and Single-Shot Applications VI
РедакторыDaniel R. Solli, Georg Herink, Serge Bielawski
ИздательSPIE
ISBN (электронное издание)9781510641778
DOI
СостояниеОпубликовано - 2021
СобытиеReal-time Measurements, Rogue Phenomena, and Single-Shot Applications VI 2021 - Virtual, Online, Соединенные Штаты Америки
Продолжительность: 6 мар 202111 мар 2021

Серия публикаций

НазваниеProceedings of SPIE - The International Society for Optical Engineering
Том11671
ISSN (печатное издание)0277-786X
ISSN (электронное издание)1996-756X

Конференция

КонференцияReal-time Measurements, Rogue Phenomena, and Single-Shot Applications VI 2021
СтранаСоединенные Штаты Америки
ГородVirtual, Online
Период06.03.202111.03.2021

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