LYCOS RETRIEVER 
Laser: Miscellaneous
built 645 days ago
The laser is particularly beneficial in amputations. Its ability to minimize bleeding allows the surgery to progress much faster. This section shows the amputation of the ear of a dog that has a Mast Cell tumor. This is a malignant tumor that requires aggressive surgery if it is to be controlled.
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PowerBeam 1931FL is the first laser chip integrating a spot size converter with special features for automated alignment. The integration of these functions into a single chip enables customers to implement low-cost passive assembly processes on manufacturing lines.
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In a Q-switched laser, the population inversion (usually produced in the same way as CW operation) is allowed to build up by making the cavity conditions (the 'Q') unfavorable for lasing. Then, when the pump energy stored in the laser medium is at the desired level, the 'Q' is adjusted (electro- or acousto-optically) to favorable conditions, releasing the pulse. This results in high peak powers as the average power of the laser (were it running in CW mode) is packed into a shorter time frame.
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[E29] van Breughel H et al: Power density and exposure time of HeNe laser irradiation are more important than total energy dose in photo-biomodulation of human fibroblasts in vitro. Lasers in Surgery and Medicine. 1992; 12: 528
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You'd expect a $53,700 backpack laser to be some DARPA super weapon that's stuck in a perpetual "five years away" as more and more cable specials are produced on the matter. But actually, the backpack laser already exists and it's reserved for the men and women risking their lives to restore old buildings. more
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In the continuous wave (CW) mode of operation, the output of a laser is relatively consistent with respect to time. The population inversion required for lasing is continually maintained by a steady pump source.
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