Progress and prospects of silicon-based design for optical phased array

SPIE OPTO Pub Date : 2016-03-15 DOI:10.1117/12.2214155
Weiwei Hu, Chao Peng, C. Chang-Hasnain
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引用次数: 5

Abstract

The high-speed, high-efficient, compact phase modulator array is indispensable in the Optical-phased array (OPA) which has been considered as a promising technology for realizing flexible and efficient beam steering. In our research, two methods are presented to utilize high-contrast grating (HCG) as high-efficient phase modulator. One is that HCG possesses high-Q resonances that origins from the cancellation of leaky waves. As a result, sharp resonance peaks appear on the reflection spectrum thus HCGs can be utilized as efficient phase shifters. Another is that low-Q mode HCG is utilized as ultra-lightweight mirror. With MEMS technology, small HCG displacement (~50 nm) leads to large phase change (~1.7π). Effective beam steering is achieved in Connie Chang-Hasnian’s group. On the other hand, we theoretically and experimentally investigate the system design for silicon-based optical phased array, including the star coupler, phased array, emission elements and far-field patterns. Further, the non-uniform optical phased array is presented.
硅基光学相控阵设计的进展与展望
高速、高效、紧凑的相位调制器阵列是光相控阵(OPA)中必不可少的组成部分,它被认为是实现灵活、高效的光束控制的一种很有前途的技术。在我们的研究中,提出了两种利用高对比度光栅(HCG)作为高效相位调制器的方法。一是HCG具有高q共振,源于漏波的抵消。因此,在反射光谱上出现尖锐的共振峰,因此hcg可以用作有效的移相器。另一种是利用低q模式HCG作为超轻量镜。利用MEMS技术,小的HCG位移(~50 nm)导致大的相变(~1.7π)。Connie Chang-Hasnian的团队实现了有效的光束控制。另一方面,从理论上和实验上研究了硅基光学相控阵的系统设计,包括星耦合器、相控阵、发射元件和远场图。进一步介绍了非均匀光学相控阵。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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