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8 January 2008 Research of surface acoustic wave acousto-optic effect
Tao Liu, Kuanxin Yu, Shuyang Hu, Shiya He, Wei An, Shengming Li
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Proceedings Volume 6838, Optoelectronic Devices and Integration II; 68381E (2008) https://doi.org/10.1117/12.753557
Event: Photonics Asia 2007, 2007, Beijing, China
Abstract
A strengthened acousto-optic (AO) coefficient of piezoelectric crystal is defined. AO coupled-wave equations of surface acoustic wave (SAW) to plane guide optic wave (PGOW) and to fiber guide optic wave (FGOW) are given respectively. A diffractive efficiency formula of SAW PGOW AO interaction and a back-wave efficiency formula of SAW FGOW AO interaction are given. The formulas indicate that under condition of weak AO interaction intensities of the diffractive wave and the back-wave are proportional to ultrasonic powers. Lithium Niobate (LN) is optimum crystal of SAW PGOW AO device, quartz is optimum crystal of SAW FGOW AO device. A SAW PGOW AO modulator using LN and a SAW FGOW AO modulator using quartz are designed and manufactured. Some curves of the diffractive wave power and the back-wave power vs. electric powers of signals driving the modulators are measured. SAW AO modulators have many advantages, for example small volume, good stability, low energy consumption and it is easy to integrate. The modulators can be used as intensity modulators. The modulators have applications in optic communication and real time signal processing.
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Tao Liu, Kuanxin Yu, Shuyang Hu, Shiya He, Wei An, and Shengming Li "Research of surface acoustic wave acousto-optic effect", Proc. SPIE 6838, Optoelectronic Devices and Integration II, 68381E (8 January 2008); https://doi.org/10.1117/12.753557
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KEYWORDS
Acousto-optics
Adaptive optics
Modulators
Crystals
Acoustics
Waveguides
Piezoelectric effects
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