Red (660 & 635 nm), green (532 & 520 nm) and blue-violet (445 & 405 nm) lasers
A 40 watt CO2 laser used for soft-tissue laser surgery
A laser beam used for welding
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A helium–neon laser demonstration. The glow running through the center of the tube is an electric discharge. This glowing plasma is the gain medium for the laser. The laser produces a tiny, intense spot on the screen to the right. The center of the spot appears white because the image is overexposed there.
Spectrum of a helium–neon laser. The actual bandwidth is much narrower than shown; the spectrum is limited by the measuring apparatus.
Lidar measurements of lunar topography made by Clementine mission.
Laserlink point to point optical wireless network
Mercury Laser Altimeter (MLA) of the MESSENGER spacecraft
Aleksandr Prokhorov
Charles H. Townes
LASER notebook: First page of the notebook wherein Gordon Gould coined the acronym LASER, and described the elements required to construct one. Manuscript text: "Some rough calculations on the feasibility / of a LASER: Light Amplification by Stimulated / Emission of Radiation. /
Conceive a tube terminated by optically flat / [Sketch of a tube] / partially reflecting parallel mirrors..."
Graph showing the history of maximum laser pulse intensity throughout the past 40 years.
Wavelengths of commercially available lasers. Laser types with distinct laser lines are shown above the wavelength bar, while below are shown lasers that can emit in a wavelength range. The color codifies the type of laser material (see the figure description for more details).
A 50 W FASOR, based on a Nd:YAG laser, used at the Starfire Optical Range
A 5.6 mm 'closed can' commercial laser diode, such as those used in a CD or DVD player
Close-up of a table-top dye laser based on Rhodamine 6G
The free-electron laser FELIX at the FOM Institute for Plasma Physics Rijnhuizen, Nieuwegein
Lasers range in size from microscopic diode lasers (top) with numerous applications, to football field sized neodymium glass lasers (bottom) used for inertial confinement fusion, nuclear weapons research and other high energy density physics experiments.
The US–Israeli Tactical High Energy weapon has been used to shoot down rockets and artillery shells.
Laser application in astronomical adaptive optics imaging

Laser surgery is a type of surgery that uses a laser (in contrast to using a scalpel) to cut tissue.

- Laser surgery

Lasers are used in optical disc drives, laser printers, barcode scanners, DNA sequencing instruments, fiber-optic, semiconducting chip manufacturing (photolithography), and free-space optical communication, laser surgery and skin treatments, cutting and welding materials, military and law enforcement devices for marking targets and measuring range and speed, and in laser lighting displays for entertainment.

- Laser
Red (660 & 635 nm), green (532 & 520 nm) and blue-violet (445 & 405 nm) lasers

3 related topics

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Surgery underway at the Red Cross Hospital in Tampere, Finland during the 1918 Finnish Civil War.

Surgery

Medical or dental specialty that uses operative manual and instrumental techniques on a person to investigate or treat a pathological condition such as a disease or injury, to help improve bodily function, appearance, or to repair unwanted ruptured areas.

Medical or dental specialty that uses operative manual and instrumental techniques on a person to investigate or treat a pathological condition such as a disease or injury, to help improve bodily function, appearance, or to repair unwanted ruptured areas.

Surgery underway at the Red Cross Hospital in Tampere, Finland during the 1918 Finnish Civil War.
Plates vi & vii of the Edwin Smith Papyrus, an Egyptian surgical treatise
Sushruta, the author of Sushruta Samhita, one of the oldest texts on surgery
Hippocrates stated in the oath (c. 400 BC) that general physicians must never practice surgery and that surgical procedures are to be conducted by specialists
Ambroise Paré (c. 1510–1590), father of modern military surgery.
12th century medieval eye surgery in Italy
Joseph Lister, pioneer of antiseptic surgery
Hieronymus Fabricius, Operationes chirurgicae, 1685
John Syng Dorsey wrote the first American textbook on surgery
An operation in 1753, painted by Gaspare Traversi.

By equipment used: Laser surgery involves use of a laser for cutting tissue instead of a scalpel or similar surgical instruments. Microsurgery involves the use of an operating microscope for the surgeon to see small structures. Robotic surgery makes use of a surgical robot, such as the Da Vinci or the ZEUS robotic surgical systems, to control the instrumentation under the direction of the surgeon.

Preparation of nanoparticles by laser in solution

Laser ablation

Preparation of nanoparticles by laser in solution
Laser ablation of an asteroid-like sample
Industrial 500W Cleaning Laser Narran ROD 500.

Laser ablation or photoablation (also called laser blasting ) is the process of removing material from a solid (or occasionally liquid) surface by irradiating it with a laser beam.

Laser scalpels are used for ablation in both hard- and soft-tissue surgeries.

A test target bursts into flame upon irradiation by a continuous-wave kilowatt-level carbon-dioxide laser.

Carbon-dioxide laser

One of the earliest gas lasers to be developed.

One of the earliest gas lasers to be developed.

A test target bursts into flame upon irradiation by a continuous-wave kilowatt-level carbon-dioxide laser.
A medical CO2 laser

Carbon-dioxide lasers are the highest-power continuous-wave lasers that are currently available.

The 10.6 μm CO2 laser remains the best surgical laser for the soft tissue where both cutting and hemostasis are achieved photo-thermally (radiantly).