An Integrated Acoustooptic Frequency Shifter Driven by Surface Acoustic Wave for 1.55 µm Optical Wavelength
An Integrated Acoustooptic Frequency Shifter Driven by Surface Acoustic Wave for 1.55 µm Optical Wavelength
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DOI：
10.1143/jjap.42.3063
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发表时间：
2003-05
影响因子：
1.5
通讯作者：
S. Kakio;N. Zou;Michihide Kitamura;Hiromasa Ito;Y. Nakagawa
中科院分区：
文献类型：
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作者：
S. Kakio;N. Zou;Michihide Kitamura;Hiromasa Ito;Y. Nakagawa
在1.55 μm光波长下，在交叉通道波导中实现了集成声光移频器。设计了一种新型的锥形器件，使声光互作用区变长，从而降低驱动声表面波（SAW）的功率，并在旋转128°的Y切LiNbO 3衬底上采用质子交换法和后退火工艺制备了该器件。在声表面波功率为1.4W时，衍射效率为40%，带宽为5 MHz，中心频率为196 MHz。在光外差实验中证实了布拉格衍射光的频移。
An integrated acoustooptic frequency shifter in a crossed-channel waveguide is demonstrated at an optical wavelength of 1.55 µm. A novel tapered device was designed to make the acoustooptic interaction region longer and thus the driving surface acoustic wave (SAW) power lower, and the device was fabricated by the proton-exchange method and post-annealing in a 128° rotated Y-cut LiNbO3 substrate. At SAW power of 1.4 W, a 40% diffraction efficiency and a bandwidth of 5 MHz centered at 196 MHz were obtained. The frequency shift of Bragg diffracted light was confirmed in an optical heterodyne experiment.