The 20-year-old striker, who scored three goals in 25 appearances for Lorient last season, believes that he cannot help but develop as a player in the 'world's best league'
The Costa Rica international had been looking forward to returning to the Emirates this summer after a season-long stay at Lorient but he is now eagerly awaiting his imminent move to Spain.
"It's a great opportunity for me to grow," Campbell told Fox TV. "I am going to the world's best league, and I want to play."
Campbell joined Arsenal from Costa Rican outfit Deportivo Saprissa last summer but was loaned to Lorient after failing to secure a work permit.
The 20-year-old striker, who has been capped 14 times by his country, netted three times in 25 appearances in Ligue 1 last season.