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【期刊论文】Photon-Induced Total-Internal-Reflection All-Optical Switches
王明华, Xiao Qing Jiang, Jian Yi Yang, Heng Zheng Zhan, Ke Jian Chen, Yi Tang, Xi Hua Li, and Ming Hua Wang
IEEE PHOTONICS TECHNOLOGY LETTERS, 2004, 16 (2) 443~445,-0001,():
-1年11月30日
An all-optical switch is demonstrated. The switch is based on the photon-induced carrier effect and the principle of the total internal reflection (TIR). An asymmetric Y-branch with multimode waveguides is designed and fabricated on GaAlAs/GaAs epitaxial materials. The 805-nm light is used to activate the carrier effects and generate the total-reflection effect at the branch. The device is characterized at the wavelength of 1.31m. Its extinction ratio is larger than 18.0dB when the injected optical density is 15
All-optical switch, integrated optics, photon-induced, total internal reflection.,
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【期刊论文】Improved approach to low-loss and high-uniformity MMI devices
王明华, Rui Yin*, Jianyi Yang, Xiaoqing Jiang, Jin Li, Minghua Wang
Optics Communications 181 (2000) 317-321,-0001,():
-1年11月30日
Improved approach to low-loss and high-uniformity multimode interference MMI devices is proposed in this paper. An optimized index contrast is selected to decrease the propagation constant errors of modes near cutoff in the MMI region. 1
Multimode interference, Self-imaging
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王明华, 占恒正, 江晓清**, 陈克坚
光学学报,2003,23(10):1187~1190,-0001,():
-1年11月30日
利用全内反射和波导理论,分析了多模波导反射区全内反射(Total Internal Reflection,TIR)型光开关的物理模型和降低串音和损耗的原因,给出改进Y分叉全内反射型光开关特征的近似计算方法。数值模拟表明,扩展多模波导的Y分叉全内反射开关的串音和损耗可分别下降15.5dB和0.65dB以上。
集成光学, 光开关, 全内反射(, TRI), , 多模波导
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【期刊论文】GsAIAs/GaAs量子阱行波Mach-Zehnder光调制器电极传输线的微波响应*
王明华, 周剑英, 李锡华, 周小平, 陈克坚, 赵旭
半导体学报,2003,24(11):1206~1210,-0001,():
-1年11月30日
研制了利用直线法设计的基于GaAs衬底上的Mach-Zehnder行波光调制器。波导层使用了场诱折射率改变量较大的非对称多量子阱结构,采用脊型波导,并湿法刻蚀出台面以消除波导区以外的载流子引起的损耗。调制器电极微波特性测试结果表明频率响应在2.5~20GHz没有明显的起伏,但在低频段响应下降很快,另外微波损耗较大,计论了其原因和改进方法。
调制器, 马赫-曾德尔, 多量子阱
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【期刊论文】Structure with improved self-imaging in its graded-index multimode interference region
王明华, Rui Yin, Xiaoqing Jiang, Jianyi Yang, and Minghua Wang
Yin et al. 19, (6) 1301~1303,-0001,():
-1年11月30日
Propagation constant errors (PCEs) of guided modes in regions of multimode interference in optical networks were analyzed. Results show that a graded-index waveguide can effectively decrease the PCEs. An example based on an exponential function is presented. Numerical results show that addition of a graded-index waveguide greatly improves device performance in this structure.
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