Detection of small phase modulation using two-wave mixing in photorefractive crystals

Nazhestkina, Nadezhda; Kamshilin, Alexei A.; Kobozev, Oleg V.; Prokofiev, Victor V.; Jääskeläinen, Timo

doi:10.1007/s003400100583

Cited by 8 publications

(4 citation statements)

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“…Это определяет их использование в адаптивных интерферометрах, голографических системах записи, хранения и обработки информации и др. [7][8][9][10][11]. Физические процессы записи голограмм в фоторефрактивных кристаллах основаны на пространственном перераспределении зарядов в поле интерферирующих световых пучков по многочисленным центрам, имеющим разнообразную природу возникновения и характеристики.…”

Section: динамические решетки в кристалле силиката висмутаunclassified

Пространственно-Модуляционная Спектроскопия Полупроводниковых Материалов На Основе Динамических Решеток

2022

Оптический журнал

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Section: динамические решетки в кристалле силиката висмутаunclassified

Пространственно-Модуляционная Спектроскопия Полупроводниковых Материалов На Основе Динамических Решеток

2022

Оптический журнал

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“…One of the significant advantages of cubic photorefractive crystals from the sillenites family (Bi 12 SiO 20 , Bi 12 TiO 20 , Bi 12 GeO 20 ) is the real-time formation of dynamic holograms. This property enables the use of these crystals in adaptive interferometers, in systems of associative memory, optical image amplification, holographic recording, data storage and processing, and the like [1][2][3][4][5][6]. The physical processes of hologram recording in photorefractive crystals are based on spatial redistribution of the charges in a field of interfering light beams over the numerous centers having different nature and characteristics.…”

Section: Introductionmentioning

confidence: 99%

Photoinduced Absorption and Pulsed Recording of Dynamic Holograms in Bismuth Silicate Crystals

et al. 2020

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The dynamics of photoinduced absorption and holographic-grating recording in photorefractive crystals of bismuth silicate is studied. It is shown that, with the use of nanosecond laser pulses and of the intensity on the order of 1 MW/cm 2 or higher, the induced absorption due to population of the short-lived trapping levels, with characteristic relaxation times about several milliseconds or tens of milliseconds, is the case. Recording of dynamic holograms has been realized in these conditions in bismuth silicate crystals. Two mechanisms of holographic-grating recording, with the lifetimes differing by three orders of magnitude, are established. At relatively low intensities, about 1 MW/cm 2 or lower, the medium response is determined by a photorefractive mechanism of nonlinearity, with relaxation times of several seconds. At the intensities exceeding 5 MW/cm 2 , one can observe a fast (ms relaxation times) component that may be associated with population of the short-lived traps. It is shown that the contribution of each mechanism is greatly dependent on the intensity of laser radiation and, for the intensities above 10-15 MW/cm 2 , the short-lived traps having millisecond lifetimes play the decisive role.

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“…Это определяет их использование в адаптивных интерферометрах, системах ассоциативной памяти и усиления оптических изображений, голографических системах записи, хранения и обработки информации и др. [1][2][3][4][5][6]. Физические процессы записи голограмм в фоторефрактивных кристаллах основаны на пространственном перераспределении зарядов в поле интерферирующих световых пучков по многочисленным центрам, имеющим разнообразную природу возникновения и характеристики.…”

Section: Introductionunclassified

“…Таким образом формируется голографическая решетка, динамика которой определяется динамикой поля пространственного заряда. Как правило, для формирования динамических голограмм в фоторефрактивных кристаллах используют непрерывное лазерное излучение [1][2][3][4]6,7]. Новые возможности открываются при использовании лазерных импульсов нано-и пикосекундной длительности [15][16][17][18].…”

Section: Introductionunclassified

Фотоиндуцированное Поглощение И Импульсна Запись Динамических Голограмм В Кристаллах Силиката Висмута

Даденков¹,

Толстик²,

Миксюк³

et al. 2020

Журнал Технической Физики

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Dynamics of the photoinduced absorption and holographic-grating recording in photorefractive bismuth silicate crystal has been studied. It has been shown that, with the use of nanosecond laser pulses and at the intensity above 1 МW/cm2, the induced absorption takes place due to population of the short-lived trapping levels having the characteristic relaxation times from milliseconds to a few tens of milliseconds. Recording of dynamic holograms in bismuth silicate has been realized in these conditions. Two mechanisms of holographic grating recording have been established, with the lifetimes differing by three orders of magnitude. Though the intensities are relatively low, below or on the order of 1 MW/cm2, the medium response is determined by a photorefractive nonlinearity mechanism with relaxation times at a level of several seconds. The intensities above 5 MW/cm2 are associated with fast components (ms relaxation times) appearing due to population of short-lived traps. It has been demonstrated that a contribution of each mechanism is dependent on the intensity of laser radiation and that, for the intensities above 10-15 MW/cm2, the decisive part is played by the short-lived traps with lifetimes on the order of milliseconds.

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Detection of small phase modulation using two-wave mixing in photorefractive crystals

Cited by 8 publications

References 0 publications

Пространственно-Модуляционная Спектроскопия Полупроводниковых Материалов На Основе Динамических Решеток

Пространственно-Модуляционная Спектроскопия Полупроводниковых Материалов На Основе Динамических Решеток

Photoinduced Absorption and Pulsed Recording of Dynamic Holograms in Bismuth Silicate Crystals

Фотоиндуцированное Поглощение И Импульсна Запись Динамических Голограмм В Кристаллах Силиката Висмута

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