Feb23_2005_2pp

Feb23_2005_2pp - February 23, 2005 Exam #1: Results! Range:...

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1 February 23, 2005 ± Exam #1: Results! ¾ Range: ¾ Average: ¾ Median: 62 - 186 139.1/200 (70%) 139/200 2 Population Inversion ± Requires at least a 3-state system: PUMP so that N 1 > N 0 (population inversion) Pumping Methods: Optical - flashlamp, laser Electrical - capacitive electrical discharge Chemical - reaction leaving product in excited state
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3 Optical Amplification ± We can enhance the intensity of the emission by using an optically resonant cavity: Fabry-Perot Interferometer Get constructive interference if: d’ = n λ /2 4 Constructive Interference ± Waves are
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Feb23_2005_2pp - February 23, 2005 Exam #1: Results! Range:...

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