Design and Analysis of Optical Inter- Satellite Links: Solar-Aware Path Optimization and Dual-Channel Quantum Security for Next- Generation Optical Wireless Networks = 차세대 광 무선 통신 네트워크를 위한 광 위성간 링크 설계 및 분석: 태양광 인지 경로 최적화 및 이중 채널 기반 양자 보안

다국어 초록 (Multilingual Abstract)

Optical inter-satellite links (O-ISLs) are a promising solution for nextgeneration, offering high-capacity and interference-free links through free-space
optics (FSO). However, rapid pointing, acquisition, and tracking (PAT) in dynamic
low Earth orbit (LEO) environments remain a critical challenge. This study presents
a simulator that identifies optimal paths under practical constraints, including link
distance limits, atmospheric bypass, field of view (FoV), and solar irradiance. Using
an ego-coordinate framework, the model incorporates satellite-centric geometry and
seasonal solar positioning to analyze the impact of these constraints on routing
flexibility and link performance.
In addition, a quantum key distribution (QKD) configuration is proposed to
enhance communication security in O-ISLs. Proposed dual channel model, which is
radar-inspired tracking algorithm using microcontrollers such as fast steering mirror
(FSM) and position sensing detectors (PSDs). Results show that multi-PAT
configurations enable ∼10 Gb/s throughput with ∼200 ms latency between New
York and Seoul, while inter-shell path optimization reduces total link distance by up
to 2,500 km, demonstrating improved resilience to solar irradiance. Dual channel
model improves tracking robustness under 30° with stable polarization state.

목차 (Table of Contents)

• Abstract i
• Table of Contents ii
• List of Tables iii
• List of Figures iv
• Chapter 1. Introduction １
• Chapter 2. System Modeling ４
• 2.1. Ego-coordinate modeling ４
• 2.1.1. Motivation ４
• 2.1.2. Orbital approach ８
• 2.1.3. Ego coordinate １６
• 2.1.4. Sun irradiance model ２２
• 2.1.5. Optimal path finding ２７
• 2.2. O-ISLs QKD setup ３０
• 2.2.1. BB84 protocol ３０
• 2.2.2. Experiment setup ３５
• Chapter 3. Results ３８
• 3.1. Path configuration analysis due to constraints ３８
• 3.2. Tradeoff between data-rate and latency ４２
• 3.3. Performance analysis due to Sun irradiance ４６
• 3.4. QKD experiment result ５１
• Chapter 4. Conclusion and Discussion ５５
• Reference ５７
• 국문 초록 ６２
• Acknowledgement ６４