Evolution of DPSS Lasers From Gas Lasers

==== ====Get This Product with Special Price at :http://www.amazon.com/gp/product/B0045H0L1W?tag=pdf-marketing-20==== ====DPSS LasersSince early developments in the 1960s, lasers have gone through a number of transformationsusing different types of technology. The previous generation of lasers were bulky and fragile gaslasers such as ion lasers. The current generation of lasers are diode pumped solid state lasers orDPSS for short.Diode-pumped solid-state (DPSS) lasers are solid-state lasers made by pumping a solid gainmedium, for example, a ruby or a neodymium-doped YAG crystal, with a laser diode.The most common DPSS laser in use is the 532 nm wavelength green laser pointer The greenlight from the green laser pointer is generated by a process called frequency doubling. The beamtypically originates as a 808nm beam from an infrared A1GaAs laser diode. This beam thenpumps a crystal made of neodymium-doped vanadate or Nd:YAG to produce a deeper infraredbeam with a wavelength of 1064nm.The last part of the process is passing the 1064nm beam into a KTP (potassium titanyl phosphate)crystal which acts as a frequency doubler and halves the wavelength of the beam to green 532nmlaser beam.The Viper laser pointer, the Hulk portable laser and the other lasers from Dragonlasers are DPSSlasers and use the same principle of pumping a crystal with a laser diode to produce a laser beam.Advantages of DPSS lasersDPSS lasers have a number of important over the older gas lasersThey are solid state with no fragile gas filled tube which requires the gas pressure to bemaintained correctly for optimal performance.· Durability: DPSS lasers are more rugged than the typical gas lasers that use a gasfilled tube with precise pressure requirements.· Resonators: DPSS lasers not require the complex resonator structures found ingas lasers.· Optics: The optics in DPSS lasers are much smaller than the optics in gas lasers.This allows the optics of DPSS lasers to be adjusted in the factory, an adjustment that willnormally last the life of the laser. The optics in gas lasers on the other hand need adjustment prior

to each use.· Size: DPSS lasers are much more compact that gas lasers.· Efficiency: A typical gas laser will output about 2-3% of its electrical input as light.The other 97-98% electrical input will be lost as heat. One reason why gas lasers typically needwater cooling. DPSS lasers are much more efficient and output 25-30% of their electrical input aslight.Article is courtesy of Dragonlasers - No 1 lasers, laser pointer and green laser online storeFrank from Dragonlasers at http://www.dragonlasers.comArticle Source:http://EzineArticles.com/?expert=Frank_Smith

Evolution of DPSS Lasers From Gas Lasers

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