The Blackhawks have yet to make an official announcement regarding the deal.
Salak made his NHL debut in 2009, appearing in two games for the Panthers. He was loaned to Färjestad BK of the Swedish Elite League for the 2010-11 season.
The deal is a one-way contract, according to the source. It makes Salak the front-runner to be Corey Crawford's back-up. Crawford signed a three-year contract extension Thursday.
A one-way contract means Salak is paid his NHL salary whether he plays for the Blackhawks or in the AHL. A two-way deal is when a player receives a minor league salary if he's playing in the minors and his NHL salary if he's in the majors.
Jesse Rogers covers the Blackhawks for ESPN 1000 and ESPNChicago.com.