Lasers And Their Applications

Want to read the rest of this paper? Join Essayworld today to view this entire essay and over 50,000 other term papers

is the process that the laser works on, which was first proposed by Albert Einstein in 1917. When a sufficient number of atoms, either gas solid or liquid, absorb energy so that they are in an excited state of higher energy stimulated emission can occur. Light of a specific wavelength can produce more light with the same phase and direction these light waves will be coherent. Stimulated emission amplifies the coherency of this radiation and gives the radiation a very narrow beam spread.
The combination of light amplification and stimulated emission creates a laser. Laser light is coherent because the atoms are stimulated to emit waves of light that are in phase creating constructive interference producing a powerful and intense laser light. The emitted light is monochromatic, meaning only one wavelength, and one directional. For a laser to work three components are needed. First a gain medium that can amplify light through it. Second an energy pump source to create a ...

Get instant access to over 50,000 essays. Write better papers. Get better grades. Already a member? Login

generate bursts of light over a short period of time. These short bursts are useful for studying physical phenomena over a extremely short time interval. The frequency of these lasers fall in the infrared spectrum, but can be multiplied to ultraviolet by multiplying the laser with potassium dihydrogen phosphate and X-ray wavelengths by aiming the beams at yttrium.




Gas lasers have a medium of pure gas, a mixture of gases or metal vapor enclosed in a glass or quartz tube with one fully reflective mirror and one partially reflective mirror (see illustration above). Gas lasers are pumped by ultraviolet light, electric current, chemical reactions, or electron beams. Some gas ...

Succeed in your coursework without stepping into a library. Get access to a growing library of notes, book reports, and research papers in 2 minutes or less.

CITE THIS PAGE: