<div>In IR Photodiodes will have a better response too!! since Silicon PIN diodes have higher responsivity at IR frequencies ..am not sure if there are Lasers and PIN available at a 1300 0r 1500 nm !! If there are then they will be eye safe and can pump in more power unlike 850nm !! Does any one know of some cheap Lasers and diodes in this band? 1300/1500nm? </div>
<div> </div>
<div>PK Yaduvanshi<br><br> </div>
<div><span class="gmail_quote">On 03/03/2008, <b class="gmail_sendername">eldis111</b> <<a href="mailto:eldis111@seznam.cz">eldis111@seznam.cz</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Is there reason not-to stay in IR? Only advantage I can think is easier aiming..<br>We installed many IR (professional) FSO, it is even faster than making radio link (at least around 10GHz).<br>
Higher wavelength => better SNR due to losses in atmosphere and interference from other sources.<br>But there might be another reasons.. So, what is your opinion?<br><br>eldis<br><br><br>> Everything is fine... if you stay in the IR spectrum.<br>
> if someone could find visible light high power VCSELs, that would be fine...<br>> Bye,<br>> Martin<br>><br>> eldis írta:<br>> > As Gullik says, VCSEL are much better than ordinary laser,<br>> > just look at google.<br>
> > To me, it seems that VCSEL combines good things from laser and led into<br>> > one package.<br>> ><br>> > eldis<br>> ><br>> ><br>> ><br>> >> What is crappy about VCSEL?s?<br>
> >><br>> >> To me they seem ideal, circular beam, no or very little<br>> >> astigmatism, low threshold current, good efficiency,<br>> >> fast ( ghz) relatively robust, low cost.<br>> >><br>
> >> Why do you not like them?<br>> >><br>> >> Gullik<br>> >><br>> >> -----Ursprungligt meddelande-----<br>> >> Fran: ronja-bounces+gullik.webjorn=<a href="mailto:flysta.net@lists.pointless.net">flysta.net@lists.pointless.net</a><br>
> >> [mailto:<a href="mailto:ronja-bounces+gullik.webjorn=flysta.net@lists.pointless.net">ronja-bounces+gullik.webjorn=flysta.net@lists.pointless.net</a>]For<br>> >> Gyurko Martin<br>> >> Skickat: den 1 mars 2008 22:58<br>
> >> Till: Twibright Ronja<br>> >> Amne: [Ronja] vcsel-s retail<br>> >><br>> >><br>> >> Hi!<br>> >><br>> >> For those who want these crappy lasers:<br>> >><br>
> >> <a href="http://www.roithner-laser.com/VCSELs.htm">http://www.roithner-laser.com/VCSELs.htm</a><br>> >><br>> >> May them work for you.<br>> >><br>> >> Martin<br>> >><br>
> >><br>> >><br>> ><br>> ><br>> ><br>><br>> --<br>> Twibright Ronja mailing list <a href="http://ronja.twibright.com">http://ronja.twibright.com</a><br>> <a href="mailto:Ronja@lists.pointless.net">Ronja@lists.pointless.net</a><br>
> <a href="http://pointless.net/mailman/listinfo/ronja">http://pointless.net/mailman/listinfo/ronja</a><br>><br>><br>><br><br>--<br>Twibright Ronja mailing list <a href="http://ronja.twibright.com">http://ronja.twibright.com</a><br>
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