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Laser Course
More than 2 million learners worldwide

Laser Course

Master the complete science and engineering of laser systems, from photon physics to real-world material processing. This course covers every major laser technology, beam delivery method, and safety standard used in industry today. Whether you're entering the field or advancing your career, you'll gain the technical depth to design, operate, and troubleshoot professional laser systems.

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What you will learn:

Build a solid foundation in laser physics, including atomic transitions, stimulated emission, and resonator design. Survey all major laser families—solid‑state, fiber, gas, semiconductor—and learn to read technical datasheets. Cover pulsed techniques such as Q‑switching and mode‑locking, plus beam delivery, focusing, and fiber coupling. Analyze laser interaction with metals, polymers, and ceramics for cutting, welding, marking, and ablation. Study laser safety classification, protective equipment, and regulatory compliance. Additional modules explore nonlinear optics, medical uses, system integration, and emerging tech like quantum‑cascade lasers and photonic integrated circuits.

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Course content

8 Chapters • 38 LessonsDuration between 4 and 360 hours (you decide)

Chapter 1See details

Fundamentals of Light and Optics

  • Lesson 1 • Principles of Geometric Optics

    Teaches reflection, refraction, and lens behavior that govern beam shaping in laser systems. Connects optical laws to practical beam delivery components.

  • Lesson 2 • Wave Optics and Coherence

    Introduces interference, diffraction, and coherence as properties that distinguish laser light from ordinary light. Builds conceptual groundwork for beam quality analysis.

  • Lesson 3 • Polarization of Light

    Explains linear, circular, and elliptical polarization states and their relevance to laser output control. Prepares students to interpret polarization specifications in laser datasheets.

  • Lesson 4 • Nature of Electromagnetic Radiation

    Covers wavelength, frequency, and the electromagnetic spectrum as the foundation for understanding laser light. Positions light properties within the broader context of laser physics.

Chapter 2See details

Atomic Physics and Laser Gain

  • Lesson 1 • Population Inversion and Pumping

    Explains why population inversion is required for net gain and how pumping schemes achieve it. Connects pumping efficiency to laser output power.

  • Lesson 2 • Atomic Energy Levels

    Covers quantized energy states, ground and excited levels, and electron transitions. Provides the atomic model needed to understand absorption and emission processes.

  • Lesson 3 • Gain Media and Gain Bandwidth

    Surveys solid-state, gas, liquid, and semiconductor gain media and their spectral gain profiles. Prepares students to match gain media to application requirements.

  • Lesson 4 • Absorption, Spontaneous, and Stimulated Emission

    Distinguishes the three light-matter interaction types and quantifies their rates using Einstein coefficients. Establishes stimulated emission as the mechanism behind laser amplification.

Chapter 3See details

Laser Resonator Design and Modes

  • Lesson 1 • Optical Resonator Configurations

    Introduces plane-parallel, concentric, confocal, and hemispherical cavity geometries. Connects cavity geometry to beam divergence and mode volume.

  • Lesson 2 • Transverse Modes and Beam Quality

    Describes Hermite-Gaussian and Laguerre-Gaussian mode families and the M² beam quality factor. Enables students to specify apertures and spatial filters for mode control.

  • Lesson 3 • Gaussian Beam Propagation

    Applies the ABCD matrix formalism and Rayleigh range to predict beam size and divergence through optical systems. Prepares students to design beam delivery trains.

  • Lesson 4 • Output Coupling and Cavity Losses

    Covers output coupler reflectivity optimization, intracavity losses, and the threshold gain condition. Connects loss management to overall laser efficiency.

  • Lesson 5 • Longitudinal Modes and Frequency Selection

    Explains standing-wave conditions that produce discrete longitudinal modes and techniques to select a single frequency. Ties mode spacing to cavity length for practical tuning.

Chapter 4See details

Laser Types and Operating Characteristics

  • Lesson 1 • Laser Performance Specifications

    Teaches how to read and compare datasheets using parameters such as power, efficiency, beam quality, and noise. Equips students to make quantitative laser selection decisions.

  • Lesson 2 • Solid-State Lasers

    Examines crystal and glass host lasers, including Nd:YAG and Ti:Sapphire, covering wavelengths, pulse formats, and efficiency. Highlights thermal management challenges unique to solid-state systems.

  • Lesson 3 • Semiconductor and Diode Lasers

    Explains p-n junction lasing, edge-emitting and vertical-cavity surface-emitting laser (VCSEL) structures, and beam characteristics. Addresses diode laser use as both sources and pump lasers.

  • Lesson 4 • Gas Lasers

    Covers helium-neon, CO₂, argon-ion, and excimer lasers, emphasizing discharge excitation and wavelength diversity. Connects gas laser properties to industrial and scientific applications.

  • Lesson 5 • Fiber Lasers and Amplifiers

    Describes rare-earth-doped fiber gain media, double-clad pumping, and fiber amplifier configurations. Positions fiber lasers as high-brightness, low-maintenance alternatives to bulk solid-state systems.

Chapter 5See details

Pulsed Laser Techniques

  • Lesson 1 • Mode-Locking Principles

    Covers active and passive mode-locking mechanisms that phase-lock longitudinal modes to produce ultrashort pulses. Explains the time-bandwidth product and its implications for pulse compression.

  • Lesson 2 • Q-Switching Techniques

    Explains active (AOM, EOM) and passive (saturable absorber) Q-switching to produce nanosecond pulses with high peak power. Connects Q-switch timing to pulse buildup dynamics.

  • Lesson 3 • Ultrashort Pulse Characterization

    Introduces autocorrelation, FROG, and SPIDER techniques for measuring femtosecond and picosecond pulses. Prepares students to verify pulse quality in ultrafast laser setups.

  • Lesson 4 • Fundamentals of Pulsed Operation

    Defines pulse duration, repetition rate, peak power, and pulse energy and their interrelationships. Establishes the vocabulary needed for all subsequent pulsed laser topics.

  • Lesson 5 • Pulse Compression and Stretching

    Explains grating and prism compressors, chirped pulse amplification (CPA), and stretcher design for managing peak power. Connects CPA architecture to high-energy ultrafast laser systems.

Chapter 6See details

Laser Beam Delivery and Manipulation

  • Lesson 1 • Beam Expansion and Collimation

    Explains Galilean and Keplerian beam expanders and their effect on divergence and spot size. Connects beam expansion to downstream focusing performance.

  • Lesson 2 • Fiber Coupling and Delivery

    Teaches mode-matching, numerical aperture constraints, and connector types for coupling free-space beams into single-mode and multimode fibers. Covers fiber output beam characteristics and recollimation.

  • Lesson 3 • Focusing Optics and Spot Size Control

    Applies Gaussian beam equations to select focal length and input beam diameter for a target spot size. Addresses aberrations and depth-of-focus constraints in tight-focusing applications.

  • Lesson 4 • Beam Steering and Alignment

    Covers mirror mounts, kinematic stages, and two-mirror steering techniques for precise beam pointing. Establishes alignment procedures used throughout all laser laboratory work.

  • Lesson 5 • Scanning and Dynamic Beam Control

    Introduces galvanometer scanners, acousto-optic deflectors, and spatial light modulators for dynamic beam positioning. Connects scanning speed and accuracy to application throughput requirements.

Chapter 7See details

Laser-Material Interaction and Processing

  • Lesson 1 • Laser Marking and Engraving

    Distinguishes annealing, foaming, carbonization, and ablation marking mechanisms and their material dependencies. Prepares students to select marking strategies for traceability and aesthetics.

  • Lesson 2 • Laser Cutting and Drilling

    Explains kerf formation, assist gas roles, and taper control in laser cutting and percussion drilling. Addresses parameter optimization for cut quality and throughput.

  • Lesson 3 • Laser Welding and Joining

    Covers conduction-mode and keyhole-mode welding, joint configurations, and weld bead geometry control. Connects shielding gas and focal position to weld quality.

  • Lesson 4 • Absorption and Thermal Response

    Covers optical absorption coefficients, heat diffusion, and melt pool dynamics for metals, polymers, and ceramics. Connects material thermal properties to laser power and dwell time selection.

  • Lesson 5 • Ablation and Microfabrication

    Explains fluence-dependent ablation rates, incubation effects, and ultrafast laser cold ablation for precision microfabrication. Connects pulse duration to heat-affected zone minimization.

Chapter 8See details

Laser Safety and Regulatory Compliance

  • Lesson 1 • Laser Hazard Classification

    Explains the international laser class system (Class 1–4) based on accessible emission limits and wavelength. Enables students to classify any laser system and determine required controls.

  • Lesson 2 • Engineering and Administrative Controls

    Covers beam enclosures, interlocks, warning signs, standard operating procedures, and training requirements. Establishes a layered control hierarchy for laser laboratory and industrial environments.

  • Lesson 3 • Laser Protective Eyewear Selection

    Teaches optical density requirements, wavelength coverage, and comfort factors for selecting compliant laser eyewear. Addresses common errors in eyewear specification and use.

  • Lesson 4 • Biological Effects of Laser Radiation

    Covers ocular and skin injury mechanisms, critical wavelength ranges, and maximum permissible exposure limits. Connects biological vulnerability to the selection of protective measures.

  • Lesson 5 • Laser Safety Program Management

    Explains the role of the laser safety officer, incident reporting, medical surveillance, and audit procedures. Prepares students to establish or evaluate a facility-level safety program.

Certification

Your valid completion certificate

This course is for you:

  • Electrical engineer ready to specialize in photonics and laser systems.

  • Manufacturing technician who operates laser equipment without formal training.

  • Physics graduate student bridging theory and hands-on laser engineering practice.

  • Biomedical researcher using lasers in imaging or therapy without deep optics background.

  • Career changer from mechanical engineering seeking roles in laser-based manufacturing.

  • Laser safety officer needing stronger technical grounding behind the regulations they enforce.

What our students say

Your classes are perfect. I purchased the one-year package and finally have the opportunity to follow various topics of my interest without needing to change platforms... I thank you for everything you do, I've already recommended you to other people...
Giulio Carlo
Giulio CarloDigital Marketing Student
I like how the lessons are straight to the point and how I can switch chapters and skip content I don't need.
Mariana Ferres
Mariana FerresPhotography Student
I like the content and the way videos are presented and transcribed, which speeds up the process!
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Luciana AlvarengaNail Design Student
The platform is fast, simple to use. The diversity of content and complementary videos really help with learning.
André Felipe
André FelipePrompt Engineering Student

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