Wavelength-selective coupling between vertically integrated thin-film waveguides via supermode by a pair of grating couplers

被引：9

作者：

Ura, S ^{[1
]}

Nishida, R ^{[1
]}

Suhara, T ^{[1
]}

Nishihara, H ^{[1
]}

机构：

[1] Osaka Univ, Dept Elect Engn, Grad Sch Engn, Suita, Osaka 5650871, Japan

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2001年 / 13卷 / 07期

关键词：

grating couplers; guided modes; integrated optics; optical coupling; optical waveguides; propagation and waveguiding; stacked waveguides; supermodes; wavelength selective coupling;

D O I：

10.1109/68.930412

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Grating coupling between vertically integrated waveguides via supermode was discussed and demonstrated. Two thin-film waveguides with grating couplers were stacked on a substrate. A guided wave in one waveguide is converted by a grating coupler to a supermode propagating contradirectionally, and then converted by another grating coupler to a guided wave in the other waveguide. The coupling shows high wavelength selectivity, and the wavelength-division add/drop multiplexing function can be combined. A demonstrator was designed and fabricated. Theoretically predicted coupling efficiency was almost 100% with wavelength selectivity of 2 nm, while the experimentally obtained value was 40% in the efficiency and 1 nm in the selectivity.

引用

页码：678 / 680

页数：3

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