Abstract

The optical circulator is a fundamental building block of photonic systems, due to its ability to route signals entering the device at various ports, as well as provide optical isolation. Fundamentally, the ideal optical circulator is a compact, polarization-independent device that provides high isolation ratios and low insertion losses over a broad bandwidth. Many designs have attempted to satisfy this demanding set of criteria; however, none have succeeded in fulfilling them all simultaneously. In this work, we present the design and theoretical characterization of a truly versatile nanophotonic optical circulator. By integrating three waveguide architectures, we are able to effectively demonstrate the three key components of the optical circulator. Notably, silicon photonic waveguides provide the basis for a 3 dB power splitter/combiner, while a silicon-based L-slot waveguide half-wave plate provides reciprocal polarization rotation, and a cerium-substituted yttrium iron garnet Faraday rotator provides the nonreciprocal polarization rotation. With this scheme, our simulations show an efficient nanophotonic circulator with a compact length of 173.75 μm that is capable of providing isolation ratios between 17.8 and 22.5 dB and insertion losses less than 2.7 dB for either transverse-electric- or transverse-magnetic-mode input. Thus, such a device can be crucial in the emerging nanophotonic optical networks and on-chip optical computing platforms.

© 2018 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Dynamically reconfigurable integrated optical circulators

Duanni Huang, Paolo Pintus, Chong Zhang, Paul Morton, Yuya Shoji, Tetsuya Mizumoto, and John E. Bowers
Optica 4(1) 23-30 (2017)

Integrated TE and TM optical circulators on ultra-low-loss silicon nitride platform

Paolo Pintus, Fabrizio Di Pasquale, and John E. Bowers
Opt. Express 21(4) 5041-5052 (2013)

Towards heterogeneous integration of optical isolators and circulators with lasers on silicon [Invited]

Duanni Huang, Paolo Pintus, and John E. Bowers
Opt. Mater. Express 8(9) 2471-2483 (2018)

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

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 (7)

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 (4)

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 (1)

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

Metrics

You do not have subscription access to this journal. Article level metrics 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