Question

Earlier we considered a typical He-Ne laser, and calculated the Doppler broadened linewidth of the lasing emission, and found 1.5 GHz. For natural broadening, the spectral width ??1/2 is given by ??1/2 ? (2??2)^-1 where ?2 is the lifetime of the upper laser level, and we can take A21 = 1/?2. Given A21 = 3.4

Name: earlier we considered a typical he ne laser and calculated the doppler broadened linewidth of the lasing emission and found 15 ghz for natural broadening the spectral width 12 is given by 12 07467
Uploaded: 2023-06-27T11:00:42-08:00
Duration: 2 min 42 s
Channel: Madhur L
Description: earlier we considered a typical he ne laser and calculated the doppler broadened linewidth of the lasing emission and found 15 ghz for natural broadening the spectral width 12 is given by 12 07467

          Earlier we considered a typical He-Ne laser, and calculated the
Doppler broadened linewidth of the 
lasing emission, and found 1.5 GHz. For natural broadening, the
spectral width ??1/2 is given by 
??1/2 ? (2??2)^-1 where ?2 is the lifetime of the upper laser
level, and we can take A21 = 1/?2. Given A21 
= 3.4

Added by Andres E.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Madhur L

06/27/2023

Step 1

We are given A21 = 3.4, which is the Einstein coefficient for spontaneous emission from the upper laser level to the lower level. This coefficient is related to the lifetime of the upper level, ?2, by A21 = 1/?2. Show more…

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Earlier we considered a typical He-Ne laser, and calculated the Doppler broadened linewidth of the lasing emission, and found 1.5 GHz. For natural broadening, the spectral width ??1/2 is given by ??1/2 ? (2??2)^-1 where ?2 is the lifetime of the upper laser level, and we can take A21 = 1/?2. Given A21 = 3.4