A concept of integrated acousto-optical switches with multi-modulated-arms in parallel

作者：Fan Guofang; Li Yuan; Hu Chunguang; Lei Lihua; Guo Yanchuan^*

来源：Journal of Optics (India), 2017, 46(3): 277-280.

DOI：10.1007/s12596-016-0371-0

• Contrast ratio
• Fabrication tolerances
• Multi-modulated-arms
• Number of arms
• On/off contrast ratio
• On/off switch
• Optimum structures
• Parallel configuration

An analysis is developed for integrated acousto-optical (AO) switches with multi-modulated-arms in a parallel configuration. The analysis shows that an integrated AO switch with multi-arms can improve contrast ratio largely. The optimum SAW phase of closing arms is presented to achieve highest contrast ratio for the integrated AO switches with multi-modulated-arms. A trade-off of fabrication tolerance and higher on/off contrast ratio is discussed, in which, larger number of modulated arms shows a higher on/off contrast ratio, but a stricter fabrication. The research shows that an AO switch with 8-modulated-arms is an optimum structure as an on/off switch with a higher contrast ratio of −75 dB and less number of arms.

• 出版日期2017
• 单位天津大学