Realization of efficient 3D tapered waveguide-to-fiber couplers on a nanophotonic circuit
Abstract
We report the realization of efficiently coupled 3D tapered waveguide-to-fiber couplers (TWCs) based on standard lithography techniques. The 3D TWC design is capable of achieving highly efficient flat-cleaved fiber to silicon nitride photonic waveguide coupling, with T ≈ 95 % polarization-insensitive coupling efficiency, wide bandwidth, and good misalignment tolerance. Our fabricated 3D TWCs on a functional nanophotonic circuit achieve T ≈ 85% coupling efficiency. Beyond applications in high-efficiency photon coupling, the demonstrated 3D lithography technique provides a complementary approach for mode field shaping and effective refractive index engineering, potentially useful for general applications in integrated photonic circuits.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 15, 2022
- Source ID
- 10.1364/oe.468738
Entities
People
- Chen-Lung Hung
- Hikaru Tamura
- Tzu-Han Chang
- Xinchao Zhou
Organizations
- Air Force Office of Scientific Research
- National Science Foundation
- Purdue University