September 2nd, 2005 | 
Author: Viper Ruby Red
Children Go On A Journey With Optimistic Outlook (made by Hagaren Viper)
 |
 GOLDFINGER 1 18 JAMES BOND 007 ASTON MARTIN DB5 GADGETS  US $239.99
|
 VIPER Ruby Red Martini Billiards Pool Cue Stick 50 0951 US $44.95
|
 Viper Ruby Red Martini Pool Cue 18 oz US $42.95
|
 Marvel Minimates Klaw Secret Wars Storm Exclusive TRU US $9.99
|
 Snake Serpent Viper Silver Brooch Pin w Ruby Crystals US $1.29
|
 Harpers Anthology of 20th Century Native American P US $2.99
|
 JL 1 64 R7 40th Anniv 2008 DODGE VIPER SRT10 COUPE ruby US $4.95
|
 Viper Ruby Red Martini Pool Cue 21 oz US $42.95
|
 FORD MUSTANG SHELBY DODGE RAM VIPER RALLY STRIPE DECAL US $69.99
|
 MUSTANG ROCKER SIDE STRIPE VINYL DECAL STICKER 79 Free US $34.99
|
 Viper Pool Cue Ruby Red Martini US $41.00
|
 Love Spiral Swarovski Emerald Birth Crystal Earrings US $6.95
|
 Love Spiral Swarovski Topaz Birth Crystal Earrings US $6.95
|
 Love Spiral Swarovski Sapphire Birth Crystal Earrings US $6.95
|
 Love Spiral Swarovski Peridot Birth Crystal Earrings US $6.95
|
 Yu gi oh Super Deck Builders COMPLETE Revised LIST US $1.00
|
 Corvette Enthusiast June 2005 Vol 8 Issue 6 US $13.00
|
 Colours By Viper Ruby Red Martini Pool Cue US $41.24
|
 24 NEW RED 1 2 FORGED LUG NUTS FITS DODGE VIPER R T 10 US $35.28
|
 24 NEW RED 1 2 FORGED LUG NUTS FITS DODGE VIPER SRT10 US $35.28
|
Evolution of Dpss Lasers From Gas Lasers
Since early developments in the 1960's, lasers have gone through a number of transformations using different types of technology. The previous generation of lasers were bulky and fragile gas lasers such as ion lasers. The current generation of lasers are diode pumped solid state lasers or DPSS for short.
Diode-pumped solid-state (DPSS) lasers are solid-state lasers made by pumping a solid gain medium, 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 green light from the green laser pointer is generated by a process called frequency doubling. The beam typically originates as a 808nm beam from an infrared A1GaAs laser diode. This beam then pumps a crystal made of neodymium-doped vanadate or Nd:YAG to produce a deeper infrared beam 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 532nm laser beam.
The Viper laser pointer, the Hulk portable laser and the other lasers from Dragonlasers are DPSS lasers and use the same principle of pumping a crystal with a laser diode to produce a laser beam.
Advantages of DPSS lasers
DPSS lasers have a number of important over the older gas lasers
They are solid state with no fragile gas filled tube which requires the gas pressure to be maintained correctly for optimal performance.
· Durability: DPSS lasers are more rugged than the typical gas lasers that use a gas filled tube with precise pressure requirements.
· Resonators: DPSS lasers not require the complex resonator structures found in gas 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 will normally 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 need water cooling. DPSS lasers are much more efficient and output 25-30% of their electrical input as light.
Article is courtesy of Dragonlasers - No 1 lasers, laser pointer and green laser online store
About the Author
Frank is from Dragonlasers at http://www.dragonlasers.com
Posted in POOL CUES