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| | Encyclopedia of Laser Physics and Technology - laser cavities, laser diodes, laser design, linewidth, laser safety, ... (Site not responding. Last check: 2007-10-15) |
 | | A laser requires a laser cavity (or laser resonator), in which the laser radiation can circulate and pass a gain medium which compensates the cavity losses. |
 | | A simple scheme for laser cooling is Doppler cooling, where light forces are exerted by absorption and subsequent spontaneous emission of photons, and the rate of these processes depends on the velocity of an atom or ion due to the Doppler shift. |
 | | Nearly all electrically pumped semiconductor lasers are laser diodes; quantum cascade lasers are an exception. |
| www.rp-photonics.com /encyclopedia_l.html (8069 words) |
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