The welterweight, who has been out of the ring for the last 18 months also teamed up with Matchroom and Eddie Hearn, putting an end to one of the biggest feuds in British boxing.
The former unified light-welterweight champion is to fight for the first time in the UK for five years when he takes on an unnamed opponent at the Liverpool Echo Arena on April 21st.
His partnership with Hearn has also fuelled speculation of a bout with Kell Brook, who also has Hearn as a promoter, in the future.
And Khan said he would be interested in getting in the ring with Brook one day, and claimed to be in the “best shape ever” when he spoke to talkSPORT’s James Savundra.
Khan said: “I’m really excited to be back in the ring.
“I want to win a world title again. I want to win the world championship. That’s where I believe I belong so I need to work hard.
“The short-term goal is to get back into the boxing ring which is happening in April. I’m going to get the feel of boxing again and go to training camp in a few weeks.
“The long-term goal is to become world champion again. I want to finish my career off on a high.
“I’m at the peak of my career now. Three fights this year is something I want to do and I can’t wait.
“I have a few years left in me. I feel strong, I feel excited and I still feel that hunger is there for me and when I train, I’m training like I’m 21, honestly! I feel I’m probably in the best shape ever. I can’t wait to get back out in the ring because I know there is a new Amir Khan out there now.”
On signing a deal with Hearn, Khan admitted that it must be a huge surprise to everyone in the boxing world due to the public disagreements the pair have had in the past.
Khan added: “The news is shocking not just to boxing fans but of the general world of boxing as well. No one ever thought me and Eddie were ever going to work together. We had our ups and downs and now have put our egos aside to work together.
“He [Hearn] is the best in boxing, he’s on top of his game at the moment and I know I can get to where I need to get to with him.”
Bolton-born Khan, who first made a name for himself when he claimed a silver medal in the lightweight categoiry at the 2004 Olympics in Athens aged just 17, spent last month on reality show I’m a Celebrity Get Me Out of Here!.
And he said his time in the jungle was crucial in allowing him to think about his boxing career.
Khan said: “Last year was a bit difficult for me but the jungle definitely gave me a place to think about life and where I want to be and I decided boxing is where I belong.
“There was a stage where I thought ‘boxing is what people know me for, why am I in the jungle?’ People want to see me because I am a boxer.”
READ: Amir Khan signing with Eddie Hearn is a smart move and Tyson Fury should follow his lead – Opinion