In this Letter we propose an original mechanism to select scar modes through coherent gain amplification in a multimode $D$-shaped fiber. More precisely, we demonstrate the selective amplification of scar modes by positioning a gain region in the vicinity of the self-focal point of the shortest periodic orbit in the transverse motion.

• Received 31 July 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.224101