Physical propagation
Study Maxwell-based wave propagation, modes, attenuation, dispersion, nonlinear effects, and atmospheric turbulence.
Active learning track · Classical and hybrid optical systems
Optical Communication
I am extending my communication-systems background toward optical fiber and free-space optical links. My study begins with electromagnetic propagation, waveguides, photodetection, and link noise, then progresses to coherent transceivers, receiver DSP, optical networking, and hybrid RF/optical systems.
Transferable foundationCommunication link analysis, BER and noise modeling, Monte Carlo methods, MATLAB, receiver processing, and RF-system coursework
Building nowOptical waveguides, photodetection, dispersion, nonlinearity, coherent transceivers, optical networking, and atmospheric links
Why this matters for 6G
High-capacity infrastructure and complementary wireless links
Optical systems are central to transport, access, fronthaul, data-center, and satellite infrastructure. Free-space optical links also complement RF where bandwidth, directionality, interference, or spectrum constraints motivate another physical medium.
Devices and link models
Connect lasers, modulators, amplifiers, photodiodes, noise sources, and link budgets to received electrical signals.
Transceiver DSP
Examine equalization, polarization separation, timing, carrier recovery, phase estimation, and forward-error correction.
System integration
Study WDM, access networks, software-defined optical control, free-space links, and hybrid RF/optical NTN.
Technical foundation
Mathematics and systems under study
Mathematical foundations
- Maxwell's equations, boundary conditions, wave equations, and guided-mode eigenvalue problems
- Fourier analysis, complex-envelope representations, sampling, and linear-system models
- Photodetection statistics, shot and thermal noise, OSNR, Q-factor, and BER analysis
- Chromatic and polarization-mode dispersion through impulse responses and transfer functions
- The nonlinear Schrödinger equation, Kerr effects, and split-step Fourier simulation
- Modulation, coherent detection, equalization, carrier recovery, information rate, and coding
Technical scope
- Lasers, modulators, photodiodes, optical amplifiers, and link-budget design
- Fiber modes, attenuation, chromatic dispersion, PMD, and nonlinear impairments
- Intensity modulation with direct detection and coherent transceiver architectures
- DSP for equalization, polarization demultiplexing, timing, frequency, and carrier-phase recovery
- WDM, space-division multiplexing, passive optical networks, and software-defined optical networking
- Free-space optical and visible-light links, turbulence, pointing errors, and hybrid RF/optical systems
Structured roadmap
From optical propagation to networked systems
Optical fields, waveguides, and devices
Build the electromagnetic and photonic basis for sources, modulation, guided propagation, amplification, and photodetection.
Noise, dispersion, nonlinearity, and BER
Model the main fiber and receiver impairments and relate OSNR and signal quality to error probability.
Coherent transceivers and digital signal processing
Study quadrature detection, polarization multiplexing, equalization, frequency and phase recovery, and coding.
Optical networking and free-space links
Connect transceiver models to WDM, access, software-defined control, atmospheric channels, and hybrid RF/optical NTN.
Selected study resources
Books, papers, and recorded university courses
These representative sources guide my roadmap. Their inclusion does not imply that every item has been completed.
The sources span optical-link fundamentals, coherent-receiver DSP, and openly available university instruction.
Fiber-Optic Communication Systems
Govind P. Agrawal. A foundation for fiber links, transmitters, receivers, amplifiers, dispersion, nonlinearity, and system design.
Wiley Online LibraryDigital Coherent Optical Systems
Mello and Barbosa. A focused treatment of coherent architectures and receiver algorithms.
SpringerFundamentals of Coherent Optical Fiber Communications
Kazuro Kikuchi. Core principles of coherent detection and digital coherent receiver design.
Optica Publishing GroupDigital Signal Processing for Coherent Transceivers Employing Multilevel Formats
Faruk and Savory. A receiver-DSP review covering synchronization, equalization, and carrier recovery.
Optica Publishing GroupFiber-Optic Communication Systems and Techniques
A structured NPTEL course from IIT Kanpur covering fiber devices, propagation, links, and system techniques.
NPTELUnderstanding Lasers and Fiberoptics
MIT OpenCourseWare lectures and demonstrations connecting laser physics with optical-fiber behavior.
MIT OpenCourseWareBridge from completed work
Connecting wireless analysis to optical links
The physical devices and propagation mechanisms are different, but several system-analysis tools transfer directly.
BER and noise analysis My thesis experience with conditional error probability, fading, and simulation provides a base for photodetection and optical-channel performance models.
Receiver-side signal processing Detection, estimation, sampling, and communication DSP concepts carry into coherent equalization and carrier recovery.
RF and electromagnetic modeling experience RF Systems coursework and an Ansys HFSS rat-race hybrid coupler project provide prior experience connecting fields, components, and communication-system behavior.
Standards lens
Optical networks toward 2030
ITU ION-2030
An ITU framework for how optical networks can evolve in support of IMT-2030, AI, data centers, broadband access, and integrated sensing.
Read the ITU technical reportITU-T Study Group 15
The ITU group responsible for standards covering optical transport, access, home networks, and related infrastructure.
Visit ITU-T SG15