Abstract

Optical mode mismatch makes coupling between strip and slot waveguides a tough issue in integrated photonics. This Letter presents both numerical and experimental results of a strip-slot mode converter based on symmetric multimode interference (MMI). Distinct from previous reported converters which gradually convert the mode through sharp tips, the proposed solution makes full use of the symmetry of the two-fold image of MMI, and its field distribution similarity with a slot waveguide to convert the mode. A converter based on this mechanism is able to convert light from a TE-polarized fundamental mode of a strip waveguide to that of a slot waveguide, and vice versa. Strip-slot waveguide coupling though this mode converter has a measured efficiency of 97% (0.13dB), and the dimensions are as small as 1.24×6μm. Further analysis shows that the proposed converter is highly tolerant to fabrication imperfections, and is wavelength-insensitive.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Robust polarization-insensitive strip-slot waveguide mode converter based on symmetric multimode interference

Qingzhong Deng, Qiaojing Yan, Lu Liu, Xinbai Li, Jurgen Michel, and Zhiping Zhou
Opt. Express 24(7) 7347-7355 (2016)

Low-loss silicon nitride strip-slot mode converter based on MMI

Xiangpeng Ou, Yan Yang, Bo Tang, Donghao Li, Fujun Sun, Peng Zhang, Ruonan Liu, Bin Li, and Zhihua Li
Opt. Express 29(12) 19049-19057 (2021)

Ultracompact low-loss coupler between strip and slot waveguides

Zhechao Wang, Ning Zhu, Yongbo Tang, Lech Wosinski, Daoxin Dai, and Sailing He
Opt. Lett. 34(10) 1498-1500 (2009)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription