Aliasing-Free Beam-Steering Over the Entire Field of View Utilizing a Bent Waveguide Array with a Uniform Half-Wavelength Spacing

2018 ◽  
Author(s):  
Weihan Xu ◽  
Hongxi Tang ◽  
Linjie Zhou ◽  
Liangjun Lu ◽  
Jianping Chen
Keyword(s):  
Beam Steering ◽  
Field Of View ◽  
Waveguide Array ◽  
Wavelength Spacing ◽  
Entire Field ◽  
Half Wavelength ◽  
Free Beam

scholarly journals Grating Lobe-Free Beam Steering through Optical Phase Array Using Phase-Compensated Two Index-Mismatched Silicon Wires-Based Emitters

2020 ◽  
Vol 10 (4) ◽  
pp. 1225
Author(s):  
Rong-An Zhang ◽  
Ting-Sheng Lin ◽  
Wai-Ting Liu ◽  
Shih-Hsiang Hsu ◽  
Che-Chang Chang
Keyword(s):  
Phase Shifter ◽  
Beam Steering ◽  
Thermal Control ◽  
Phase Shifters ◽  
Phase Array ◽  
Optical Phase ◽  
Grating Lobe ◽  
Half Wavelength ◽  
Beam Formation ◽  
Free Beam

The beam formation can be treated as the diffraction pattern. A 1-D light detection and ranging beam steering could be derived through a phase shifter array using Rayleigh–Sommerfeld Diffraction, which is then utilized to demonstrate grating lobe-free beam steering from the optical phase array emitter with half-wavelength pitches. The half-wavelength pitch cannot demonstrate beam formation without any evanescent coupling blocking between emitters. Here, two index-mismatched silicon wires in the emitter array are proposed by the optical phase compensation through waveguide width adjustment, to avoid the complex and addressable thermal control on the phase shifters. Moreover, the same output optical waveguide mode needs to be further considered to demonstrate the grating lobe-free beam steering. In order to get the adiabatic connection between two different pitches between the phase shifter and emitter, an optical path equalization will also be applied.

Silicon Optical Phased Array with Grating Lobe-Free Beam Formation Over 180 Degree Field of View

2018 ◽  
Author(s):  
Christopher T. Phare ◽  
Min Chul Shin ◽  
Jahnavi Sharma ◽  
Sohail Ahasan ◽  
Harish Krishnaswamy ◽  
...  
Keyword(s):  
Phased Array ◽  
Field Of View ◽  
Grating Lobe ◽  
Beam Formation ◽  
Optical Phased Array ◽  
Free Beam

Design of a low-crosstalk half-wavelength pitch nano-structured silicon waveguide array

2019 ◽  
Vol 44 (13) ◽  
pp. 3266 ◽  
Author(s):  
Liping Wang ◽  
Ze Chen ◽  
Hongfei Wang ◽  
Ang Liu ◽  
Peng Wang ◽  
...  
Keyword(s):  
Waveguide Array ◽  
Silicon Waveguide ◽  
Half Wavelength

Slow-light Bragg reflector waveguide array for two-dimensional beam steering

2014 ◽  
Vol 53 (3) ◽  
pp. 038001 ◽  
Author(s):  
Kensuke Nakamura ◽  
Akihiro Matsutani ◽  
Moustafa Ahmed ◽  
Ahmed Bakry ◽  
Fumio Koyama
Keyword(s):  
Slow Light ◽  
Beam Steering ◽  
Bragg Reflector ◽  
Waveguide Array ◽  
Two Dimensional

scholarly journals Sidelobe-Free Beam-Steering using Optical Phased Arrays for Neural Probes

2021 ◽  
Author(s):  
Fu-Der Chen ◽  
Youngho Jung ◽  
Tianyuan Xue ◽  
Jason C. C. Mak ◽  
Xianshu Luo ◽  
...  
Keyword(s):  
Phased Arrays ◽  
Beam Steering ◽  
Neural Probes ◽  
Optical Phased Arrays ◽  
Free Beam

scholarly journals Wide-Angle Beam-Steering Using an Optical Phased Array with Non-Uniform-Width Waveguide Radiators

Photonics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 56
Author(s):  
Youngin Kim ◽  
Hyeonho Yoon ◽  
Jong-Bum You ◽  
Minchul Kim ◽  
Hyo-Hoon Park
Keyword(s):  
Phased Array ◽  
Beam Steering ◽  
Side Lobe ◽  
Phase Shifters ◽  
Wide Angle ◽  
Half Wavelength ◽  
Electro Optic ◽  
Optical Phased Array ◽  
Diffraction Patterns ◽  
Silicon Based

We demonstrate wide-angle beam-steering using an optical phased array (OPA) with waveguide radiators designed with non-uniform widths to reduce the crosstalk between waveguides. The OPA consists of a silicon based 1 × 16 array of electro-optic phase shifters and end-fire radiators. The 16 radiators were configured with four different widths and a half-wavelength spacing, which can remove the higher-order diffraction patterns in free space. The waveguides showed a low crosstalk of −10.2 dB at a wavelength of 1540 nm. With phase control, the OPA achieved wide beam-steering of over ±80° with a side-lobe suppression of 7.4 dB.

scholarly journals Reconfigurable Transmitarray With Near-Field Coupling to Gap Waveguide Array Antenna for Efficient 2-D Beam Steering

2020 ◽  
Vol 68 (12) ◽  
pp. 7854-7865
Author(s):  
Artem R. Vilenskiy ◽  
Mikhail N. Makurin ◽  
Chongmin Lee ◽  
Marianna V. Ivashina
Keyword(s):  
Beam Steering ◽  
Near Field ◽  
Array Antenna ◽  
Waveguide Array ◽  
Field Coupling

Calibration of Thermal Imagers by Evaluation of the Entire Field-of-View

2011 ◽  
Vol 32 (11-12) ◽  
pp. 2600-2609 ◽  
Author(s):  
A. Miklavec ◽  
I. Pušnik ◽  
V. Batagelj ◽  
J. Drnovšek
Keyword(s):  
Field Of View ◽  
Entire Field ◽  
Thermal Imagers

scholarly journals Wide Field-of-view and Broadband Terahertz Beam Steering Based on Gap Plasmon Geodesic Antennas

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Kaipeng Liu ◽  
Yinghui Guo ◽  
Mingbo Pu ◽  
Xiaoliang Ma ◽  
Xiong Li ◽  
...  
Keyword(s):  
Beam Steering ◽  
Field Of View ◽  
Wide Field ◽  
Wide Field Of View ◽  
Broadband Terahertz
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