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The laser works by the same principle as the maser, but produces higher-frequency coherent radiation at visible wavelengths. The maser was the precursor to the laser, inspiring theoretical work by Townes and Arthur Leonard Schawlow that led to the invention of the laser in 1960 by Theodore Maiman. When the coherent optical oscillator was first ...
The terms laser and maser are also used for naturally occurring coherent emissions, as in astrophysical maser and atom laser. [18] [19] A laser that produces light by itself is technically an optical oscillator rather than an optical amplifier as suggested by the acronym. [20]
The ruby laser was the first laser to be made functional. Built by Theodore Maiman in 1960, the device was created out of the concept of an "optical maser," a maser that could operate in the visual or infrared regions of the spectrum.
Recognition for Maiman and his laser invention continued posthumously. In a 2007 obituary testimonial, maser co-inventor Charles H. Townes described Maiman's 1960 Nature article on his laser as "probably more important per word than any of the papers published by Nature over the past century."
In 1958, two years before Maiman demonstrated the laser (initially called an "optical maser"), [3] Schawlow and Townes [4] transferred the maser linewidth to the optical regime by replacing the thermal energy by the photon energy, where is the Planck constant and is the frequency of laser light, thereby approximating that
Laser offers the sharpest text at the fastest speeds, but inkjets produce unmatched colors and graphic prints. Inkjet Vs. Laser Printers: Which Is Sharpest, Fastest, and Most Functional For The Price
Panel discussions on the role of high-power lasers in SDI took place at various laser conferences, during the 1980s, with the participation of noted physicists including Edward Teller. [ 83 ] [ 84 ] A notable example of a directed energy system which came out of the SDI program is the Neutral Particle Beam Accelerator developed by Los Alamos ...
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