Djetou, who can also play in the centre of defence, spent last season with Istres.
He is currently without a club after being released by Bolton Wanderers in January 2006.
Prior to his brief spell at Bolton, his only other experience in English football came by the way of a two year loan spell at Fulham where he made around 50 appearances but a permanent deal could not be agreed with Italian club Parma.
The Côte d'Ivoire-born Djetou has won full international honours with France, the country he grew up in, and has also played for French clubs Monaco, Nice, Strasbourg and US Créteil.