[Ronja] IR vs Visible

[Pramod yaduvanshi]

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?

PK Yaduvanshi


On 03/03/2008, eldis111 <eldis111 at seznam.cz> wrote:
>
> Is there reason not-to stay in IR? Only advantage I can think is easier
> aiming..
> We installed many IR (professional) FSO, it is even faster than making
> radio link (at least around 10GHz).
> Higher wavelength => better SNR due to losses in atmosphere and
> interference from other sources.
> But there might be another reasons.. So, what is your opinion?
>
> eldis
>
>
> > Everything is fine... if you stay in the IR spectrum.
> > if someone could find visible light high power VCSELs, that would be
> fine...
> > Bye,
> > Martin
> >
> > eldis írta:
> > > As Gullik says, VCSEL are much better than ordinary laser,
> > > just look at google.
> > > To me, it seems that VCSEL combines good things from laser and led
> into
> > > one package.
> > >
> > > eldis
> > >
> > >
> > >
> > >> What is crappy about VCSEL?s?
> > >>
> > >> To me they seem ideal, circular beam, no or very little
> > >> astigmatism, low threshold current, good efficiency,
> > >> fast ( ghz) relatively robust, low cost.
> > >>
> > >> Why do you not like them?
> > >>
> > >> Gullik
> > >>
> > >> -----Ursprungligt meddelande-----
> > >> Fran: ronja-bounces+gullik.webjorn=flysta.net at lists.pointless.net
> > >> [mailto:ronja-bounces+gullik.webjorn=flysta.net at lists.pointless.net
> ]For
> > >> Gyurko Martin
> > >> Skickat: den 1 mars 2008 22:58
> > >> Till: Twibright Ronja
> > >> Amne: [Ronja] vcsel-s retail
> > >>
> > >>
> > >> Hi!
> > >>
> > >> For those who want these crappy lasers:
> > >>
> > >> http://www.roithner-laser.com/VCSELs.htm
> > >>
> > >> May them work for you.
> > >>
> > >> Martin
> > >>
> > >>
> > >>
> > >
> > >
> > >
> >
> > --
> > Twibright Ronja mailing list http://ronja.twibright.com
> > Ronja at lists.pointless.net
> > http://pointless.net/mailman/listinfo/ronja
> >
> >
> >
>
> --
> Twibright Ronja mailing list http://ronja.twibright.com
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja
>



-- 
Tel: +91 9940589851
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://pointless.net/pipermail/ronja/attachments/20080303/ba202eb7/attachment.html