Prediction and suppression of strong dispersive coupling in microracetrack channel drop filters

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	Prediction and suppression of strong dispersive coupling in microracetrack channel drop filters
	Chen Q (Chen Qin) ; Yang YD (Yang Yue-De) ; Huang YZ (Huang Yong-Zhen)
刊名	optics letters
	2007
卷号	32 期号:13 页码:1851-1853
关键词	MICRORING RESONATORS
ISSN号	issn: 0146-9592
通讯作者	chen, q, chinese acad sci, inst semicond, state key lab integrated optoelect, pob 912, beijing 100083, peoples r china. 电子邮箱地址: chenqin@red.semi.ac.cn
中文摘要	for a four-port microracetrack channel drop filter, unexpected transmission characteristics due to strong dispersive coupling are demonstrated by the light tunneling between the input-output waveguides and the resonator, where a large dropping transmission at off-resonance wavelengths is observed by finite-difference time-domain simulation. it causes a severe decline of the extinction ratio and finesse. an appropriate decrease of the coupling strength is found to suppress the dispersive coupling and greately increase the extinction ratio and finesse, a decreased coupling strength can be realized by the application of an asymmetrical coupling waveguide structure. in addition, the profile of the coupling dispersion in the transmission spectra can be predicted based on a coupled mode theory analysis of an equivalent system consisting of two coupling straight waveguides. the effects of structure parameters on the transmission spectra obtained by this method agree well with the numerical results. it is useful to avoid the strong dispersive coupling region in the filter design. (c) 2007 optical society of america.
学科主题	光电子学
收录类别	SCI
语种	英语
公开日期	2010-03-29
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/9376]
专题	半导体研究所_中国科学院半导体研究所（2009年前）
推荐引用方式 GB/T 7714	Chen Q ,Yang YD ,Huang YZ . Prediction and suppression of strong dispersive coupling in microracetrack channel drop filters[J]. optics letters,2007,32(13):1851-1853.
APA	Chen Q ,Yang YD ,&Huang YZ .(2007).Prediction and suppression of strong dispersive coupling in microracetrack channel drop filters.optics letters,32(13),1851-1853.
MLA	Chen Q ,et al."Prediction and suppression of strong dispersive coupling in microracetrack channel drop filters".optics letters 32.13(2007):1851-1853.