File:Helium neon laser spectrum.svg

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    English: Spectrum of a en:Helium neon laser taken using an Ocean Optics HR2000 spectrometer [1] by bouncing the laser off of a white benchtop and guiding the diffuse reflected light directly into the spectrometer. The emission spectrum of the HeNe laser is even more monochromatic than seen here (it is typically around a mere 2 picometers in bandwidth) and the broadening of the peak in this spectrum is actually a result of the imperfect optics and scattering of light inside the spectrometer which results in some light being detected on the parts of the (linear CCD) sensor which surround the central peak. A very high resolution spectrum of a en:Brillouin scattered HeNe laser can be seen here [2] for reference. Spectrum taken by me.
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    • Image:Helium_neon_laser_spectrum.png licensed with GFDL-en, GFDL-user-en-with-disclaimers
      • 2008-08-16T09:52:42Z Papa November 2641x1751 (85510 Bytes) rm opaque bg and cropped using GIMP.
      • 2008-08-16T09:47:24Z File Upload Bot (Magnus Manske) 2748x1870 (106503 Bytes) {{BotMoveToCommons|en.wikipedia}} {{Information |Description={{en|Spectrum of a [[:en:Helium neon laser]] taken using an Ocean Optics HR2000 spectrometer [http://www.oceanoptics.com/] by bouncing the laser off of a white be

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    current12:30, 16 August 2008Thumbnail for version as of 12:30, 16 August 20082,655 × 1,753 (59 KB)wikimediacommons>Papa November{{Information |Description={{en|Spectrum of a en:Helium neon laser taken using an Ocean Optics HR2000 spectrometer [http://www.oceanoptics.com/] by bouncing the laser off of a white benchtop and guiding the diffuse reflected light directly into the

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