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![PDF] The low- level laser therapy in temporo-mandibular disorders-an update of the current literature | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/311acd13884d929df2dcddf8d71ce644876956a1/3-Table1-1.png "PDF] The low- level laser therapy in temporo-mandibular disorders-an update of the current literature | Semantic Scholar")
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Lasers
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Laser - Population Inversion - 3level Laser and 4level Laser
![Four level laser energy diagram [46]. | Download Scientific Diagram](https://www.researchgate.net/profile/Waleska-Castro/publication/48189940/figure/fig1/AS:669521719332879@1536637825690/Four-level-laser-energy-diagram-46_Q320.jpg "Four level laser energy diagram [46]. | Download Scientific Diagram")
Four level laser energy diagram [46]. | Download Scientific Diagram
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2: Energy diagram of 4-level lasers. | Download Scientific Diagram
![Four level laser energy diagram [46]. | Download Scientific Diagram](https://www.researchgate.net/publication/48189940/figure/fig1/AS:669521719332879@1536637825690/Four-level-laser-energy-diagram-46.png "Four level laser energy diagram [46]. | Download Scientific Diagram")
Four level laser energy diagram [46]. | Download Scientific Diagram
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Schematic view of a four-level laser system. | Download High-Quality Scientific Diagram
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Section 2.4: Rate Equations and Population Inversion
4 Level Laser System
Laser - Population Inversion - 3level Laser and 4level Laser
