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Увеличение углового диапазона развертки лазерного пучка в анизотропном акустооптическом дефлекторе

Увеличение углового диапазона развертки лазерного пучка в анизотропном акустооптическом дефлекторе

Abstract

Method of increasing the angular sweep range of beam in the anisotropic acousto optic deflector in paratellurite by increasing the incidence angle of the diffracted beam on the output side of the deflector is proposed. On the basis of vector diagrams the calculation methods of the acousto-optic interaction geometry in an paratellurite crystal for the lower and upper branches of diffraction under specified range of operating frequency of control is presented. The ratio for calculation of light-acoustic line design of the proposed unit and linearization of the beam deflection angles at the deflector output under condition of incident and emerging beams parallelism are obtained. It is shown that for the laser beam with a radiation wavelength 1,064 μm maximum angular sweep range of beam reaches 5.7◦ at the deflector output under condition of incident and emerging beams parallelism and 7.5 ◦ in case of deviation from this condition, which is confirmed by experimental studies

Предложен способ увеличения углового диапазона развертки пучка в анизотропном акустооптическом дефлекторе на парателлурите за счет увеличения угла падения дифрагированного пучка на выходную грань дефлектора. На основе векторных диаграмм изложена методика расчета геометрии акустооптического взаимодействия в кристалле парателлурита для нижней и верхней ветвей дифракции при заданном диапазоне рабочих частот управления. Получены соотношения для расчета конструкции светозвукопровода предлагаемого устройства и линеаризации углов отклонения пучка на выходе дефлектора при условии параллельности падающего и выходящего пучков. Показано, что для лазерного пучка с длиной волны излучения 1,064 мкм максимальный угловой диапазон развертки пучка на выходе дефлектора достигает 5,7◦ при выполнении условия параллельности падающего и выходящего пучков и 7,5◦ при отступлении от данного условия, что подтверждается экспериментальными исследованиями

Keywords

АНИЗОТРОПНЫЙ АКУСТООПТИЧЕСКИЙ ДЕФЛЕКТОР, ПАРАТЕЛЛУРИТ, ГЕОМЕТРИЯ АКУСТООПТИЧЕСКОГО ВЗАИМОДЕЙСТВИЯ, СВЕТОЗВУКОПРОВОД, УГЛОВОЙ ДИАПАЗОН РАЗВЕРТКИ ПУЧКА

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
bronze