Abstract

Mode-order converters act as the vital higher-order mode sources for on-chip multimode applications. Here, we propose a silicon-based mode-order conversion scheme by leveraging etching slots on the circular waveguide. Through designing and optimizing the etching slots and circular waveguide, the mode-order conversion from input ${{\rm TE}_0}$ mode to output ${{\rm TE}_1}$ mode has been achieved with the mode conversion efficiency of 99.1%, modal crosstalk of ${-}{25.7}\;{\rm dB}$, and insertion loss of 0.21 dB, respectively, in a mode conversion size of ${\sim}{8}\;{\unicode{x00B5}{\rm m}} \times {8}\;{\unicode{x00B5}{\rm m}}$ (${{\rm TE}_0} {\text -} {{\rm TE}_1}$). For the device fabrication, only one-step lithography and etching processes will be required, and the requirements of slot width (600 nm) and slot gap (1.49 µm) would be very beneficial for the device fabrication. Moreover, the proposed device scheme can also help achieve other higher-order mode conversions, such ${{\rm TE}_0} {\text -} {{\rm TE}_2}$ and ${{\rm TE}_0} {\text -} {{\rm TE}_3}$, where their structural parameters and performances are also analyzed. With these features of relatively good device performance, compact size, easy fabrication, and functional scalability, we believe the proposed scheme would be applied in the on-chip multimode applications to enhance their transmission capacities.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
Design of a compact silicon-based TM-polarized mode-order converter based on shallowly etched structures

Luping Liu, Yin Xu, Long Wen, Yue Dong, Bo Zhang, and Yi Ni
Appl. Opt. 58(33) 9075-9081 (2019)

On-chip silicon shallowly etched TM0-to-TM1 mode-order converter with high conversion efficiency and low modal crosstalk

Yin Xu, Chenxi Zhu, Xin Hu, Yue Dong, Bo Zhang, and Yi Ni
J. Opt. Soc. Am. B 37(5) 1290-1297 (2020)

Ultra-compact reflective mode converter based on a silicon subwavelength structure

Tao Wang, Hengquan Guo, Haoxiang Chen, Jianhong Yang, and Hao Jia
Appl. Opt. 59(9) 2754-2758 (2020)

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 OSA member, or as an authorized user of your institution.

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

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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 OSA member, or as an authorized user of your institution.

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

Figures (9)

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

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

Tables (2)

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

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

Equations (3)

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

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