You can if you get a Columbus Tusk Trekking fork, http://www.fatbirds.co.uk/18499/products/columbus-tusk-trekking-cyclocross-touring-fork.aspxThe only downside of carbon forks is that you can't stick pannier racks on them, so they're not that useful for heavy duty touring.
But they are great on a road bike for reducing vibration.
You can if you get a Columbus Tusk Trekking fork, http://www.fatbirds.co.uk/18499/products/columbus-tusk-trekking-cyclocross-touring-fork.aspx
Carbon forks on my mountain bike take a hell of a beating and I can stand the bike on its nose on them.