WOLFRAM NOTEBOOK

WOLFRAM|DEMONSTRATIONS PROJECT

He-Ne Laser

​
time
0
seed
436729486
The He-Ne laser is constructed from a tube containing a mixture of the two gases, with about a 1:10 ratio of neon to helium. The neon and helium atoms are shown as green and blue dots, respectively. The mirror at one end is totally reflective, while the one at the opposite end is about 99% reflective. The physical parameters are arranged so that the strongest laser emission is a beam of red light with wavelength 632.8 nm. In the principal mode of laser action, helium atoms are excited to their
2
1
S
0
state by a high-voltage electrical discharge, and these collide with neon atoms, exciting an electron to a
3s
level. This produces a population inversion in the Ne atoms, and stimulated emission occurs when the excited electron makes a transition back to a
2p
level in its ground state.
Wolfram Cloud

You are using a browser not supported by the Wolfram Cloud

Supported browsers include recent versions of Chrome, Edge, Firefox and Safari.


I understand and wish to continue anyway »

You are using a browser not supported by the Wolfram Cloud. Supported browsers include recent versions of Chrome, Edge, Firefox and Safari.