Energy Source
R=95%
Helium
Neon
1s
2s0
2s3
2p51s
2p52s
2p53s
(1s22s2)2p6
2p52p
2p53p
Electron
excitation
3.39µm
0.63µm
1.15µm
collisions
“metastable”
LASER CAVITY
Lifetime of states is shortened
By STIMULATED EMISSION
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