Lahiri, 28, finished an impressive tied fifth at the year's final Major at Whistling Straits to sweeten a 2015 campaign which already includes two victories in Malaysia and India and commendable performances at the Masters Tournament and The Open.
"Anirban is one of our exceptional talents who have emerged from the Asian Tour in recent times. We've seen his career progress dramatically from his rookie season in 2008 till today and he has done very well. We are happy for his success," said Han.
"I believe Anirban will achieve more success internationally and he has the right credentials to lift a Major title in the very near future. He has the ability, the right work ethics and self-confidence to achieve this dream."
After helping India win the team silver medal in the Asian Games in 2006, Lahiri joined the paid ranks in 2007 and eventually established himself in the sub-continent by winning for the first time on the PGTI Tour in 2009.