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Article #3813Re: Cheap laser possible?
From: David Knapp
Date: Sun, 27 Sep 1992 16:46
Date: Sun, 27 Sep 1992 16:46
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1549 bytes
In article <1992Sep25.122819.29025@alf.uib.no> sigurd@novaja.NoSubdomain.NoDomain (Sigurd Tjelmeland) writes: >I have understood that one of the most expensive parts >of a laser is the mirror that lets just a little light >through. What would happen if one substituted this >with a fully reflecting mirror with some small holes >drilled in it. Of course this would set up some >interference pattern on the beam, but would a laser >beam be produced this way? > >Just curious, > >Sigurd >e-mail: sigurd@imr.no > My mail to you bounced. What you've described is 'edge coupling' and it works fine in many instances. Yes, diffraction interference can be a problem in the near field. For a 'cheap laser' you might be interested in a nitrogen laser which requires no vacuum or mirrors. If you want to discuss this more, just write. -- David Knapp University of Colorado, Boulder Perpetual Student knapp@spot.colorado.edu
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Newsgroups: sci.physics Path: arc1-ca.pugleaf.net!sparky!uunet!van-bc!ubc-cs!destroyer!gumby!wupost!cs.utexas.edu!sun-barr!ames!agate!boulder!ucsu!spot.Colorado.EDU!knapp From: knapp@spot.Colorado.EDU (David Knapp) Subject: Re: Cheap laser possible? Message-ID: <1992Sep27.164608.13439@ucsu.Colorado.EDU> Sender: news@ucsu.Colorado.EDU (USENET News System) Nntp-Posting-Host: spot.colorado.edu Organization: University of Colorado, Boulder References: <1992Sep25.122819.29025@alf.uib.no> Date: Sun, 27 Sep 1992 16:46:08 GMT Lines: 28