This song is called "Polar Lights" and the author is Jens Gad. :

Introduction to Jens Gad:

Jens Gad, a native of Munich, Germany, is a new-age musician and one of the important collaborators of Enigma, Germany's famous new-age music project.

Jens Gad and Frank Farian created 3 songs and an album called "Q" from 1988 to 1990.

In 1991, Jens Gad and Michael Cretu established A.R.T Studio (a studio mainly based on computer recording and arranging) in Ibiza, Spain (located in the western Mediterranean).

Trance. Atlantic. Air. Waves., another band formed by Michael Cretu and Jens Gad in 1998.

Reference link: Baidu Encyclopedia