| 光子晶体波导可调光衰减器 |
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| 引用本文： | 殷建玲,黄旭光,刘颂豪.光子晶体波导可调光衰减器[J].中国激光,2007,34(5):71-674. |
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| 作者姓名： | 殷建玲 黄旭光 刘颂豪 |
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| 作者单位： | 华南师范大学光子信息技术广东省高校重点实验室,广东,广州,510006 |
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| 基金项目： | 广东省自然科学基金;广东省自然科学基金;教育部留学回国人员科研启动基金 |
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| 摘 要： | 提出一种直接用光子晶体(PC)波导实现的新型可调光衰减器(VOA)。基于填充液晶的光子晶体方向带隙的可调节性,通过调节液晶指向矢的旋转角实现对光子晶体波导衰减量进行控制。采用时域有限差分法(FDTD)对其原理和结构参量进行了分析。数值模拟结果表明,随着液晶旋转角从0°～90°改变,填充液晶的光子晶体波导可以实现光通量在0.5～25.4dB的动态衰减,它插入到普通光子晶体波导之间的额外损耗只有0.2dB,尺寸仅为微米量级。
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| 关 键 词： | 光通信 可调光衰减器 光子晶体波导 液晶 |
| 文章编号： | 0258-7025（2007）05-0671-04 |
| 收稿时间： | 2006/10/16 |
| 修稿时间： | 2006-10-16 |
A Variable Optical Attenuator Based on the Photonic Crystal Waveguide |
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| YIN Jian-ling,HUANG Xu-guang,LIU Song-hao.A Variable Optical Attenuator Based on the Photonic Crystal Waveguide[J].Chinese Journal of Lasers,2007,34(5):71-674. |
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| Authors: | YIN Jian-ling HUANG Xu-guang LIU Song-hao |
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| Institution: | Laboratory of Photonic Information Technology, South China Normal University, Guangzhou, Guangdong 510006, China |
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| Abstract: | A novel variable optical attenuator (VOA) based on the photonic crystal (PC) waveguide infiltrated with liquid crystals is demonstrated. The PC waveguide decrement is controlled by adjusting rotation angle of the liquid cyrstals orientation vector. And the VOA properties are numerically investigated by using the finite difference time domain (FDTD) method. Numerical simulation shows that the attenuator in the PC waveguide can be changed based on the orientation of liquid crystals by adjusting the applied field. Furthermore, the attenuator lies in 0.5～25.4 dB with rotation angle of the liquid crystals varying from 0° to 90°, the insertion loss is less than 0.2 dB, and the size is in micron dimension. |
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| Keywords: | optical communication variable optical attenuator photonic crystal waveguide liquid crystal |
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