Graduate Thesis Or Dissertation
 

Gas ratio and pressure effects on the 6328 A⁰ transition of the helium-neon gas laser

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/cn69m853b

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  • This is a review paper of current literature in the area of pressure effects on gaseous lasers. This thesis discusses the mechanisms which relate the relative power output of the 6328 A[superscript ⁰] neon transition to total and partial pressure variations of the helium-neon gaseous laser. The operation of the helium-neon gas system utilized to obtain this visible transition is described. The rates and modes of production and destruction of the helium metastable atoms are presented. The interaction of the two gases and the requirements for sustained population inversion of the neon laser levels are considered, including inelastic electron collisions and radiation trapping. Some assumptions and approximations are made to prevent the analysis from becoming too cumbersome. The effective transition rates of the upper and lower laser levels are shown to be functions of the total and partial pressures. Some available data is presented. It is shown that good agreement exists between the data and the proposed models. Some inconsistencies between the data of various authors exist so that these models do not give a quantitative analysis of the lasing process but rather represent segments of the lasing process.
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  • File scanned at 300 ppi using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
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