A two-crystal fibre-pigtailed acousto-optic frequency shifter has been developed and investigated. An optimal configuration of acousto-optic cells is chosen. A two-crystal acousto-optic frequency shifter of 785-nm laser radiation in the range from 156 to 196 MHz, with single-mode polarisation maintaining fibres at the input and output, is described. Some recommendations are given how to improve the shifter transmission coefficient and increase the frequency shift range.

中文翻译：

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带光纤输入的宽带声光激光移频器

已经开发和研究了一种双晶体光纤尾纤声光移频器。选择了声光单元的最佳配置。描述了在 156 到 196 MHz 范围内的 785 nm 激光辐射的双晶体声光移频器，在输入和输出处具有单模保偏光纤。给出了如何提高移相器传输系数和增加移频范围的一些建议。