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Journal Article
Tracking Efficiency Improvement According to Incident Beam Size in QPD-Based PAT System for Common Path-Based Full-Duplex FSO Terminals
- Authors
- Siwoong Park, Chan Il Yeo, Young Soon Heo, Ji Hyoung Ryu, Hyun Seo Kang, Dong-Seon Lee, Jae-Hyung Jang
- Issue Date
- 2022-10
- Citation
- Sensors, v.22, no.20, pp.1-11
- ISSN
- 1424-8220
- Publisher
- MDPI
- Language
- English
- Type
- Journal Article
- Abstract
- Free space optical (FSO) communication can support various unmanned aerial vehicles' (UAVs) applications that require large capacity data transmission. In order to perform FSO communication between two terminals, it is essential to employ a pointing, acquisition, and tracking (PAT) system with an efficient and optimal performance. We report on the development of a common optical-path-based FSO communication system, tailored for applications in UAVs. The proposed system is equipped with a quadrant photodiode (QPD)-based PAT system without an additional beacon beam subsystem. The presented approach reduced the structural complexity and improved the tracking efficiency for the same size, weight, and power (SWaP). To achieve a robust FSO link in a dynamic UAV environment, the observability and controllability were obtained based on the linearized control according to the incident beam size on the QPD, which was verified by optical simulation and experiments. As a result, the QPD-based PAT system for implementing FSO links demonstrated an up to 4.25 times faster tracking performance. Moreover, the FSO link experimentally confirmed the 1.25 Gbps full-duplex error-free communication at a 50 m distance.
- KSP Keywords
- 25 Gbps, Beam size, Common path, Communication system, Data transmission, Free Space Optical (FSO) Communication, Full-Duplex(FuDu), Large capacity, Linearized Control, Optical simulation, Quadrant photodiode
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
