Underwater Optical Wireless Communication

This course presents a comprehensive exploration of Underwater Optical Wireless Communication (UOWC)—a promising alternative to traditional acoustic and RF communication methods in marine environments. Designed for professionals, researchers, and engineers working in maritime technology, defense, and oceanography, the course covers fundamentals, channel modeling, system design, and advanced modulation techniques.

• Introduction to Underwater Communication Technologies: Comparison of optical, acoustic, and RF methods; advantages and limitations in marine environments.

• Optical Properties of Water: Absorption, scattering, beam spread function, attenuation coefficients, and wavelength selection (blue-green window).

• Underwater Optical Channel Modeling: Turbulence effects, temperature and salinity gradients, particulate matter, and statistical fading models.

• System Components and Hardware Design: Transmitters (LEDs/lasers), receivers (photodiodes/APDs/SPADs), optical filters, lenses, alignment mechanisms, and packaging considerations for pressure and corrosion resistance.

• Modulation and Detection Techniques: OOK, PPM, OFDM, coherent vs. non-coherent detection, and trade-offs between complexity and performance.

• Link Budget and SNR Analysis: Range estimation, power requirements, aperture effects, and sensitivity calculations.

• Pointing, Acquisition, and Tracking (PAT): Beam alignment challenges for mobile nodes, AUV/ROV motion, and stabilization techniques.

• Performance Metrics and Evaluation: BER, QBER, SKR, throughput, latency, and reliability under varying water conditions.

• Practical Deployment Scenarios: Underwater sensor networks, AUV/ROV communications, environmental monitoring, and short-range high-data-rate links.

• Mitigation and Optimization Approaches: Spatial diversity, adaptive power control, coding/interleaving, and hybrid optical-acoustic architectures.

• Emerging Trends: AI-assisted channel estimation, energy-efficient transceivers, and integration with quantum and next-generation smart-ocean systems.

• Optical wireless / photonics engineers working on underwater or short-range high-speed optical links

• Marine and ocean engineering professionals involved in subsea communication, sensing, and exploration systems

• Defense and security technology developers focusing on underwater surveillance and secure communication

• Researchers and graduate students in optics, photonics, electrical/electronics engineering, oceanography, and applied physics

• AUV/ROV system designers developing autonomous underwater vehicles and sensor networks

• Environmental monitoring and smart-ocean solution developers requiring high-data-rate underwater connectivity

• Quantum communication and advanced sensing researchers exploring single-photon and QKD-based underwater optical links