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A 40-watt CO 2 laser with applications in ENT, gynecology, dermatology, oral surgery, and podiatry. Laser medicine is the use of lasers in medical diagnosis, treatments, or therapies, such as laser photodynamic therapy, [1] photorejuvenation, and laser surgery. The word laser stands for "light amplification by stimulated emission of radiation". [2]
The word laser originated as an acronym for light amplification by stimulated emission of radiation. [ 1 ] [ 2 ] The first laser was built in 1960 by Theodore Maiman at Hughes Research Laboratories , based on theoretical work by Charles H. Townes and Arthur Leonard Schawlow and the optical amplifier patented by Gordon Gould .
The principle of optical amplification was invented by Gordon Gould on November 13, 1957. [2] He filed US Patent US80453959A on April 6, 1959, titled "Light Amplifiers Employing Collisions to Produce Population Inversions" [3] (subsequently amended as a continuation in part and finally issued as U.S. patent 4,746,201A on May 4, 1988).
LASER – light amplification by stimulated emission of radiation [1] LASIK – laser-assisted in situ keratomileusis (eye surgery) LBO – lithium triborate; LiDAR – light detection and ranging; LLLT – low-level laser therapy
Light-emitting diode therapy (LEDT) is a clinical approach that applies different wavelengths of light to cure diseases or conditions with skin-safe lights. Following NASA's innovation in the 1990s with Light Emitting Diodes (LEDs) that emit a specific narrow light spectrum, LED Therapy (LEDT) showed significant potential. [ 1 ]
In laser science, regenerative amplification is a process used to generate short but strong pulses of laser light. It is based on a pulse trapped in a laser resonator, which stays in there until it extracts all of the energy stored in the amplification medium.
ASE can also be a desirable effect, finding use in broadband light sources. If the cavity has no optical feedback, lasing will be inhibited, resulting in a broad emission bandwidth due to the bandwidth of the gain medium. This results in low temporal coherence, offering reduced speckle noise when compared with a laser.
An optical parametric amplifier, abbreviated OPA, is a laser light source that emits light of variable wavelengths by an optical parametric amplification process. It is essentially the same as an optical parametric oscillator , but without the optical cavity (i.e., the light beams pass through the apparatus just once or twice, rather than many ...
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