Michale's personal diary

A powerful laser pointer can give off a light beam that blasts through a thick metal wall or bores a hole in a diamond.The invention of the laser was the result of many ideas and discoveries.The acronym LASER stands for "Light Amplification by Stimulated Emission of Radiation".Half a century has passed since Theodore Maiman's small ruby rod crossed the threshold of laser emission.

In honor of the powerful laser pointer turning 50, here is a timeline of some of the more notable scientific accomplishments related to light amplification by stimulated emission of radiation (laser).Columbia University graduate student Gordon Gould jots his ideas for building a laser in his notebook and has it notarized at a candy store in the Bronx.Gould and TRG launch what would become a 30-year patent dispute related to laser invention.The first medical treatment using a laser on a human patient is performed.

It took them just over two months to make a diode green laser pointer .The carbon dioxide laser is invented by Kumar Patel at Bell Labs.The technique, known as optical pumping, was an important step toward the creation of the maser and the laser.He called it a laser, which stood for light a mplification by s timulated e mission of r adiation.military leaders thought lasers might be developed into death rays to shoot down enemy planes.

The race was on to make a green laser pointer , but two crucial questions remained unanswered.Extreme nonlinear optical techniques have succeeded in upconverting visible laser light into x-rays.Petersburg, Russia, independently propose ideas to build semiconductor lasers from heterostructure devices.Helped lead to the lasers development and who jointly were awarded the first laser patent in 1960.Nicolaas Bloembergen are jointly awarded one half of the Nobel Prize in Physics for their "contribution to the development of laser spectroscopy."

In order to ensure competitiveness of our research in plasma physics, we continue to improve our main tools, the driving Laser Engraver pulses.Half a century has passed since Theodore Maiman's small ruby rod crossed the threshold of laser emission.Nd-glass lasers were the best solid state lasers available after a decade of development.Some measurement applications required pulsed beams, notably laser radars, rangefinders.

The first important Laser Engraver success was in ruby-laser treatment of detached retinas.The first big surprise was holography, and that, too, depended on the good behavior of laser photons-specifically the long coherence length of red helium-neon lasers.Two families of metal-vapor lasers also were spinoffs from the helium-mercury laser.In contrast to traditional Raman lasers, the pure-silicon Raman laser can be directly modulated to transmit data.

Lasers also needed to be built so they could be used by nonspecialists.Both the promise and problems of semiconductor diode laser pen were evident from the first demonstrations.Experience with short pulse laser and illumination systems development is preferred.Experience with laser based optical equipment is required.Work commenced on the laser at the Weapons Research Establishment in 1961 and it operated the first laser in Australia.