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The experimental investigation of AO interaction in high-resistivity monocrystalline germanium was performed employing monochromatic THz radiation (140 microns) of the free electron laser in Novosibirsk. The measured value of absorption coefficient was found to be a=(0.75+/-0.02) cm-1. The measured efficiency of AO diffraction turned to be about 0.01% per 1 W of employed electrical power. Dependence of the Bragg angle on the sound frequency F was measured within -3 dB level of deflected light intensity where F varied from 25 to 39 MHz. The maximal number of resolvable spots during the diffraction was equal to N=7.5. Therefore the AO deflection of THz radiation was done for the first time during the carried out experiment.
№ | Имя | Описание | Имя файла | Размер | Добавлен |
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1. | Полный текст | 2013_Deflection_of_laser_terahertz_pages.pdf | 108,4 КБ | 6 апреля 2014 [nikitinpavel] |