From: Gerhard Hickl <gerhard.hickl@aon.at>
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <38A51B74B884D74083D7950AD0DD85E82A1AF5@File-Server-HST.hst.e-technik.tu-darmstadt.de>
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Date: Thu, 11 Feb 2010 22:20:10 +0100
Message-ID: <1265923210.3722.5.camel@gerhard-desktop>
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Subject: Re: AW: LF: Fiber optic components
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Hello Stefan !

850nm is visible too! It by far not that bright than "visible" light is,
but nevertheless, still visible.

850nm is the typical wavelength used for MultiMode Fiber Connections.
On a 50-62.5 Multimode-Fiber it usually can travel for up to one
kilometer (850m is the nominal distance).

The wavelength I am usually dealing with is 1310 or 1550nm (SDH and WDM
equipment).

So maybe you'll give the 850nm a try. I don't know if these components
are cheaper than the 600nm but visibility is not the problem.

Cheers

OE3GHB

Gerhard
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=20

Am Donnerstag, den 11.02.2010, 20:25 +0100 schrieb Stefan Sch=C3=A4fer:
> Hi Roelof,=20
> =20
> My hint is http://www.elpro.org/shop.php?p=3DSFH+757+V for the SFH757V=
 (6,58EUR), which has the same wavelength (660nm) and less maximum forward=
 current. But the forward voltage is higher and maximum current is enough,=
 so perhaps even better than the SFH750, since the power at the same curre=
nt, say 20mA, is higher. I know, 8XX nm could be better but i want to see=
 the light coming into the shack...
> =20
> The SFH350V is available for 2,69 EUR there.=20
> =20
> 73 es vy gl es pse rprt of your success :-)
> =20
> Stefan/DK7FC
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> ________________________________
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> Von: owner-rsgb_lf_group@blacksheep.org im Auftrag von Roelof Bakker
> Gesendet: Do 11.02.2010 19:06
> An: rsgb_lf_group@blacksheep.org
> Betreff: Re: LF: Fiber optic components
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> Hello Tracey, Graham, Robert,
>=20
> Thank you all.
> Well, 21 pound is a bit stiff, me think.
> I am not that desperate yet.
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> These items are advertised as low cost....
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> I have also been looking for the components without the plastic housing.
> However these are also hard to find.
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> I will look into it a bit further.
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> 73,
> Roelof, pa0rdt
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