Timeline for Why is the bandwidth of a 'monochromatic' laser beam not zero?
Current License: CC BY-SA 3.0
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| May 29, 2017 at 22:43 | comment | added | Emilio Pisanty | Doppler shifts contribute, but there are multiple ways to make them disappear. However, homogeneous broadening - particularly liftetime broadening, caused by the fact that even if the laser pulse is long, each atom still decays within a finite time - is the ultimate lower limit on the bandwidth. | |
| May 29, 2017 at 22:01 | history | answered | Mark H | CC BY-SA 3.0 |