Design of tunable optical filter using ladder-interference-type structure
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Design of tunable optical filter using ladder-interference-type structure
Optics and Precision EngineeringVol. 13, Issue 6, Pages: 627-632(2005)
作者机构:
1. 西南交通大学 信息科学与技术学院 光通信与光器件研究所,四川 成都,610031
2. 电子科技大学 光电信息工程学院,四川 成都,610054
作者简介:
基金信息:
DOI:
CLC:TN713;TN256
Received:17 June 2005,
Revised:20 September 2005,
Published Online:30 December 2005,
Published:30 December 2005
稿件说明:
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PAN Wei, ZHANG Xiao-xia, LUO Bin, et al. Design of tunable optical filter using ladder-interference-type structure[J]. Optics and precision engineering, 2005, 13(6): 627-632.
DOI:
PAN Wei, ZHANG Xiao-xia, LUO Bin, et al. Design of tunable optical filter using ladder-interference-type structure[J]. Optics and precision engineering, 2005, 13(6): 627-632.DOI:
Design of tunable optical filter using ladder-interference-type structure
Based on the interference principle of Mach-Zehnder interferometer and the transfer matrix of multimode interference (MMI) coupler
the expression of the optical field at the output port was derived and the performance of the ladder-interference-type structure based tunable optical filter (LTOF) was investigated. The results show that there is an optimum splitting ratio of the MMI coupler for different stages obtained by algorithm. The increment in number of ladders for the LTOF will lead to the reducting peak power and narrowing 3 dB bandwidth. According to the effect of the diffraction order and the length of electrodes on the tuning performance
it is proposed to prolong the length of electrode by 40% to realize the continuous tuning. An example is given to verify the availability of this method.
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