Optical computing [Archive]

Gaurav Gupta

Dec4-04, 03:16 PM

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no, location=no,scrollbars=yes,resizable=yes,status=no ,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>Hello,\n\nI\'m new here and new to high level physics as well. What does research\nsay about having optical logical gates using lasers and crystals? Can\ntotal internal reflection of a modulated beam not be used for storage\nof bits? What about simple processing by adding two beam signals\ntogether for an AND or OR gate?\n\nPlease reply to me at gandalf_gaurav@yahoo.com\n\nThank you.\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>Hello,

I'm new here and new to high level physics as well. What does research
say about having optical logical gates using lasers and crystals? Can
total internal reflection of a modulated beam not be used for storage
of bits? What about simple processing by adding two beam signals
together for an AND or OR gate?

Please reply to me at gandalf_gaurav@yahoo.com

Thank you.

Zigoteau

Dec12-04, 03:52 AM

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no, location=no,scrollbars=yes,resizable=yes,status=no ,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>Hi, Gaurav,\n\nOptical logic gates are certainly possible and were demonstrated in the\n1980s using third-order nonlinear optical materials e.g. InSb at quite\nmodest laser intensities. There was a lot of hype at the time about how\nthis was the way forward and would supersede electronics. I\'m not quite\nsure why it didn\'t happen, but perhaps the problem was the system\nconstraints and required dimensional precision.\n\nCheers,\n\nZigoteau.\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>Hi, Gaurav,

Optical logic gates are certainly possible and were demonstrated in the
1980s using third-order nonlinear optical materials e.g. InSb at quite
modest laser intensities. There was a lot of hype at the time about how
this was the way forward and would supersede electronics. I'm not quite
sure why it didn't happen, but perhaps the problem was the system
constraints and required dimensional precision.

Cheers,

Zigoteau.