一种垂直taper型波导探测器的量子效率性能研究
首发时间:2013-01-07
摘要:高速光探测器作为高速光纤通信系统和网络中的关键器件,需要具有宽的频率响应带宽和高量子效率。波导型光探测器(WGPD)由于可以同时实现高的响应速度和高的量子效率,成为国内外研究的热点。本文为了提高波导型光探测器的量子效率,将波导层设计为垂直taper结构,对渐变耦合型波导光探测器的器件性能进行了理论研究和仿真,结果显示器件的外量子效率达到32%,高速响应带宽达到20GHz。与平行波导光探测器相比,器件性能显著提高。
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Characteristic Analysis of the Quantum Efficiency Property for a Vertically Tapered Waveguide Photodetector
Abstract:High speed photodetector is the key device for high bit rate optical fiber communication systems and optical networks that need large frequency bandwidth and high quantum efficiency simultaneously. It's well known that the waveguide photodetector overcomes the trade-off because the frequency bandwidth and quantum efficiency can be both optimized. To improve its quantum efficiency performance, a vertically tapered waveguide is used in the photodetector instead of a planar waveguide. In this paper, the performance of the vertically tapered waveguide photodetector is optimized by theoretical studies and simulation analyses. The results show that the external quantum efficiency is 30%, and the frequency bandwidth is 20GHz. Compared to the photodetector with the planar waveguide, the performance of the photodetector is significantly improved.
Keywords: waveguide photodetector vertically tapered structure quantum efficiency
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