Theoretical Demonstration of Security Improvement of Optical Phased Array Based on Optically Injection-Locked Lasers

The high security of optical phased array (OPA) signals is an important requirement for OPA-based optical wireless communication (OWC). We propose a method for improving the security of OPA-based OWC systems using optically injection-locked (OIL) semiconductor lasers. We theoretically demonstrate th...

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Bibliographic Details
Published inPhotonics Vol. 8; no. 11; p. 469
Main Authors Nguyen, Anh-Hang, Cho, Jun-Hyung, Sung, Hyuk-Kee
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.11.2021
Subjects
Amplitudes
Bandwidths
Business metrics
Data transmission
Efficiency
Frequency locking
Injection
Lasers
Noise
Oil
Optical communication
optical phased array
Optical wireless
optical wireless communication
optically injection-locked laser
Phase modulation
Phased arrays
Photonics
Radiation
Security
security improvement
Semiconductor lasers
sidelobe level
Sidelobes
Signal processing
Transmitters
unsecured distance
Window functions
Wireless communications
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Summary:The high security of optical phased array (OPA) signals is an important requirement for OPA-based optical wireless communication (OWC). We propose a method for improving the security of OPA-based OWC systems using optically injection-locked (OIL) semiconductor lasers. We theoretically demonstrate the amplitude and phase modulation of OIL-OPA elements by controlling the injection-locking parameters of the OIL lasers. When a Taylor window function is applied as the amplitude profile of the OPA transmitter, the sidelobe level decreases by 22 dB and the unsecured distance reduces 10 times compared to the case without the Taylor window function. In addition, the unsecured area factor becomes 0.8%.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics8110469