1. Basics of quantum communications 2. Structured Light 3.Quantum features of structured light 4. Poincaré beams for optical communications 5. Operators in paraxial quantum optics 6. Quantum cryptography with structured photons 7. Spin and Angular Momentum Coupling 8. Quantum communication with structured light 9. Optical angular momentum interaction with turbulent and scattering media 10. Causes and mitigation of modal crosstalk in OAM multiplexed optical communication links