The dpa news agency reported Tuesday that the court sentenced the man to 11 years in prison.
The defendant, who wasn't identified by name, acknowledged in court that he assaulted the women in August and November last year. DNA evidence linked him to both crimes.
The defendant came to Germany as an asylum-seeker more than a year ago with his wife and children.
The victims, who were 21 and 27 years old at the time, had been studying at Bochum university.