Laser Defense Lab

1. Stage 1

   Start here

   What light and a laser are, plus units and safety. No background needed.

   10 articles

   Start hereB1What is a laser? How it differs from a light bulb

2. Stage 2

   Technology

   How lasers are built, scaled and measured: amplifiers, fiber lasers, components and industrial use.

   18 articles

   Start hereB9Oscillators and amplifiers: making light, then growing it

3. Stage 3

   Laser weapons

   What laser weapons actually do, their strengths and limits, history, public programs and how to read the news.

   9 articles

   Start hereW1What is a laser weapon? Film versus realityIn preparation

4. Stage 4

   System integration

   What must be solved together for a laser to become a system: gimbals, optics, power, cooling, weight and environment.

   7 articles

   Start hereT1A laser weapon is more than a laser: the system at a glanceIn preparation

Neighboring technology that helps in understanding laser weapons. Each article names the laser articles it connects to.

• Sensors and signals

  Radar and infrared sensors, navigation and electronic warfare: the technology of finding, following and pointing.

  9 articles

  Start hereM51Radar: measuring distance and motion with radio waves

• Air defense

  Surface-to-air missiles, guns and layered defense, and where laser weapons sit among them.

  5 articles

  Start hereM14Surface-to-air missiles: ground systems that guard the skyIn preparation

• Drones and counter-drone

  Kinds of unmanned aircraft, the idea of drone defense and its cost.

  7 articles

  Start hereM65ISR drones: why endurance matters

• Electric power and testing

  Weapons that run on electricity, and the gap between simulation and real testing.

  2 articles

  Start hereM90Electromagnetic railguns: launching with electricityIn preparation

Other weapon systems such as missiles, aircraft, ships, radar and drones are explained by the same rule: open sources only, staying with principles, history and publicly documented cases.

• Missiles and Rockets1 articles
• Guided Weapons and Munitions10 in preparation
• Military Aircraft10 in preparation
• Ships and Undersea10 in preparation
• Land Systems10 in preparation
• Radar and Air Defense1 articles
• Drones and Unmanned Systems1 articles
• EW, Comms and Space10 in preparation
• Defense Tech and Industry9 in preparation

• Fiber LasersOctober 14, 2026Double-clad fibers and how pump light gets in: separate paths for laser light and pump lightWhy low-brightness diode pump light is hard to put straight into a thin core, and how a double-clad fiber solves it by giving the two kinds of light separate paths. Covers inner-cladding shapes, pumping from the end and the side, pump diodes, large-mode-area (LMA) fibers, and the limits that remain, from public sources.
• Fiber LasersOctober 14, 2026Limits of a single fiber (1): nonlinear effects (SBS, SRS)When strong light travels a long way through a thin core, the glass starts making new light. This article uses public sources to explain stimulated Brillouin scattering (SBS), where light bounces back off sound waves, and stimulated Raman scattering (SRS), where molecular vibrations shift light to longer wavelengths: how they work, how they differ, what sets their threshold, and how they are also put to use.
• Fiber LasersOctober 14, 2026Limits of a single fiber (2): heat and mode instabilityFiber lasers handle heat well, but the heat does not go away. This article uses public papers to explain how heat from the quantum defect and photodarkening changes the glass's refractive index, how that leads to transverse mode instability (TMI), where the beam suddenly starts to flicker above a certain average power, and what that 'threshold' means.
• Fiber LasersOctober 14, 2026How a fiber guides light: core and claddingWhy light inside a thin glass fiber does not leak out sideways: the refractive index difference between core and cladding, and total internal reflection. Also covers the numerical aperture (NA), single-mode and multimode fibers, and where these terms show up in articles on fiber lasers.
• Drones and Unmanned SystemsOctober 14, 2026ISR drones: why endurance mattersWhat intelligence, surveillance and reconnaissance (ISR) means, why staying aloft for a long time ties in with surveillance, the broad kinds of sensors drones carry, what changes when no one is on board, and public cases from Korea and NATO along with the debate over how drones are grouped, based on public sources.
• Laser BasicsOctober 14, 2026Q-switching and mode locking: two ways to make short pulsesQ-switching stores energy and releases it at once. Mode locking gets many waves in step. This article explains both ideas with diagrams and shows why different things set the pulse length and spacing in each.