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The uncertainty principle and the spectral width of a laser beam

 

作者: Hugo Weichel,  

 

期刊: American Journal of Physics  （AIP Available online 1976）
卷期: Volume 44, issue 9  

页码: 839-840

 

ISSN:0002-9505

 

年代: 1976

 

DOI:10.1119/1.10133

 

出版商: American Association of Physics Teachers

 

关键词: LASER RADIATION;LINEWIDTHS;SPECTRA;GAS LASERS;NEON;HELIUM;UNCERTAINTY PRINCIPLE

 

数据来源: AIP

 

摘要:

The uncertainty principle is used to derive the ultimate spectral width of the laser beam. The resulting expression is the Schawlow–Townes formula. The derivation is simple and can readily be incorporated into an introductory course on lasers. The derivation can also be used in a modern physics course to illustrate the usefulness of the uncertainty principle.

 

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