Title
Narrowband Ultrasonic Phased Array Control Using A Photonic Beamformer
Keywords
Acousto-optics; Beamforming; Nematic liquid crystals; Phased arrays; Photonics; Ultrasound
Abstract
A novel narrowband photonic beamformer for ultrasonic phased array control is proposed and demonstrated. The dual Bragg cell in-line optical design allows for the use of radio frequency Bragg cells for stable low frequency (DC-15 MHz) signal generation for driving ultrasonic arrays. Two tiny stamp size nematic liquid crystal devices provide the sites for signal phase (0-2π) and amplitude control. The proof-of-principle beamformer demonstrated 0-2π phase control and 55.8 dB gain control for a 10 MHz output signal that showed a carrier-to-noise ratio of 108 dB Hz-1 at + 100 kHz offset. Both continuous and pulsed mode beamformer operation are demonstrated. Features of the photonic beamformer include analog control, wide tuning range, fiber remoting, size/weight advantages, and low control power operation.
Publication Date
1-1-1996
Publication Title
Ultrasonics
Volume
34
Issue
1
Number of Pages
9-18
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1016/0041-624X(96)00002-9
Copyright Status
Unknown
Socpus ID
0030109905 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/0030109905
STARS Citation
Riza, Nabeel A., "Narrowband Ultrasonic Phased Array Control Using A Photonic Beamformer" (1996). Scopus Export 1990s. 2330.
https://stars.library.ucf.edu/scopus1990/2330