Optical phased array beam steering in the mid-infrared on an InP-based platform
Abstract
Compact, lightweight, high-power beam-steering devices operating in the mid-infrared atmospheric window λ = 3 − 5 µ m are attractive for aerial-based applications such as long-range lidar and countermeasures. In the near-infrared spectral region, optical phased arrays (OPAs) have emerged as the dominant nonmechanical on-chip beam-steering technology, with a preponderance in silicon-based platforms. Extensions to the mid-infrared spectral region are scarce. Further, considering that the requirements for high performance in this region will likely demand monolithic integration with quantum cascade lasers, development of the photonic technology on a native III–V platform is advantageous. To this end, at λ = 4.6 µ m , on an InGaAs/InP platform, we experimentally demonstrate the operation of a 32-channel OPA with thermo-optic tuning for azimuthal (lateral) steering. With a waveguide spacing of 2.5 λ , we steer the beam to the maximum uninfringed field of view at ± 11.5 ∘ .
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 03, 2020
- Source ID
- 10.1364/optica.400441
Entities
People
- Hamed Dalir
- Jason Midkiff
- Jong-dug Shin
- Kyoung Min Yoo
- Mohammad Teimourpour
- Ray T Chen
Organizations
- Air Force Research Laboratory
- Office of Naval Research