from reinhard schinke. lasers: n 2 >>n 1 b 21 w( ) a 13 2 1 3 b 23 w p ( ) a 21 a 23
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![Page 1: From Reinhard Schinke. Lasers: N 2 >>N 1 B 21 W( ) A 13 2 1 3 B 23 W p ( ) A 21 A 23](https://reader030.vdocuments.us/reader030/viewer/2022032704/56649d3e5503460f94a16e77/html5/thumbnails/1.jpg)
From Reinhard Schinke
![Page 2: From Reinhard Schinke. Lasers: N 2 >>N 1 B 21 W( ) A 13 2 1 3 B 23 W p ( ) A 21 A 23](https://reader030.vdocuments.us/reader030/viewer/2022032704/56649d3e5503460f94a16e77/html5/thumbnails/2.jpg)
From Reinhard Schinke
![Page 3: From Reinhard Schinke. Lasers: N 2 >>N 1 B 21 W( ) A 13 2 1 3 B 23 W p ( ) A 21 A 23](https://reader030.vdocuments.us/reader030/viewer/2022032704/56649d3e5503460f94a16e77/html5/thumbnails/3.jpg)
From Reinhard Schinke
![Page 4: From Reinhard Schinke. Lasers: N 2 >>N 1 B 21 W( ) A 13 2 1 3 B 23 W p ( ) A 21 A 23](https://reader030.vdocuments.us/reader030/viewer/2022032704/56649d3e5503460f94a16e77/html5/thumbnails/4.jpg)
From Reinhard Schinke
![Page 5: From Reinhard Schinke. Lasers: N 2 >>N 1 B 21 W( ) A 13 2 1 3 B 23 W p ( ) A 21 A 23](https://reader030.vdocuments.us/reader030/viewer/2022032704/56649d3e5503460f94a16e77/html5/thumbnails/5.jpg)
From Reinhard Schinke
![Page 6: From Reinhard Schinke. Lasers: N 2 >>N 1 B 21 W( ) A 13 2 1 3 B 23 W p ( ) A 21 A 23](https://reader030.vdocuments.us/reader030/viewer/2022032704/56649d3e5503460f94a16e77/html5/thumbnails/6.jpg)
Lasers: N2>>N1
B21W()
A13
2
1
3
B23Wp() A21 A23
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Lasers: N2>>N1
B21W()
A13
fast
2
1
3
B23Wp() A21
slow
A23
Pump
Lase
![Page 8: From Reinhard Schinke. Lasers: N 2 >>N 1 B 21 W( ) A 13 2 1 3 B 23 W p ( ) A 21 A 23](https://reader030.vdocuments.us/reader030/viewer/2022032704/56649d3e5503460f94a16e77/html5/thumbnails/8.jpg)
![Page 9: From Reinhard Schinke. Lasers: N 2 >>N 1 B 21 W( ) A 13 2 1 3 B 23 W p ( ) A 21 A 23](https://reader030.vdocuments.us/reader030/viewer/2022032704/56649d3e5503460f94a16e77/html5/thumbnails/9.jpg)
![Page 10: From Reinhard Schinke. Lasers: N 2 >>N 1 B 21 W( ) A 13 2 1 3 B 23 W p ( ) A 21 A 23](https://reader030.vdocuments.us/reader030/viewer/2022032704/56649d3e5503460f94a16e77/html5/thumbnails/10.jpg)
![Page 11: From Reinhard Schinke. Lasers: N 2 >>N 1 B 21 W( ) A 13 2 1 3 B 23 W p ( ) A 21 A 23](https://reader030.vdocuments.us/reader030/viewer/2022032704/56649d3e5503460f94a16e77/html5/thumbnails/11.jpg)
Nd3+:Y3Al5O12 (YAG)
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Cavity—2 mirrors separated by n/2
Lasers characterized by:DirectionalityMonochromaticBrightnessCoherence
Discuss: Threshhold
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LinewidthsHomogeneous Broadening:
Affects every molecule the same way
e.g. time energy uncertainty principle and pressure broadening
h 1
sets a minimum linewidth of -1
Expressed as e-t/ decay of final state probability the corresponds after Fourier transform to a Lorentzian lineshape
22
0
2max
4/1
4/
IIL FWHM=
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LinewidthsInhomogeneous broadening:
Collection of molecules have a distribution of transition energies. Typically given by statistics of different molecular environments and described by Gaussian functions.
220 2/
max eIIG FWHM=2(2ln2)
e.g. Doppler Broadening M
Tx
m
kT
C 71072ln
22
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– Mon Feb 18 Presidents day
– Weds: Rayleigh and Raman Scattering
– Weds Feb 27: Projects Part1