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Wide-angle, nonmechanical beam steering with high throughput utilizing polarization gratings
Jihwan Kim1, Chulwoo Oh, Steve Serati
1Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA.
Applied Optics
|June 16, 2011
Summary
We developed a novel nonmechanical beam steering device using polarization gratings (PGs). This device offers efficient, three-way steering with a wide field of regard and high resolution.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Nonmechanical beam steering is crucial for various optical systems.
- Polarization gratings (PGs) offer efficient light manipulation capabilities.
Purpose of the Study:
- To introduce and demonstrate a novel ternary nonmechanical beam steering device.
- To leverage PGs for a unique three-way steering design with high efficiency and throughput.
Main Methods:
- Utilized multiple stages of polarization gratings (PGs) and wave plates.
- Designed a ternary (three-way) steering architecture.
- Characterized the device performance at 1550 nm wavelength.
Main Results:
- Successfully demonstrated a three-stage beam steerer.
- Achieved a 44° field of regard with 1.7° resolution.
- Observed high throughput of 78%-83%, limited by electrode absorption and Fresnel losses.
Conclusions:
- The developed PG-based device enables efficient, nonmechanical ternary beam steering.
- The design shows potential for applications requiring wide steering angles and high throughput.
