long range irda with laser emitter?

[michcfr]

Hello,
I plan to use a laser emitter (instead of photodiode) with iRDA technology to get long range communication (up to 1km and more if possible).
Do you know any product, DIY project or link from where I can start from?

Thank you

 

[KlausST]

Hi,

How?
Laser --> through air (dirt? dust? fog?) --> disk mirror--> photodiode --> IrDa chip?
..and back?

What laser power?
What baud rate?
How do you adjust the direction?

Klaus

 

[michcfr]

It is for unidirectional data transmission from the laser (with lens) to a photodiode. No back.
It is for outdoor usage, so yes there would be dirt , fog, dust...
Laser class 1 power.
Use standard irda data rates from SIR (MIR is a plus) using standard irda encoder/decoder chip.

 

[D.A.(Tony)Stewart]

Mbps-km product path loss budget works somewhat like RF.
Start there and fibre optic examples with IRDA 2 Vishay/Sharp detector Rx