title: Large area single-mode parity-time-symmetric laser amplifiers.
abstract: By exploiting recent developments associated with parity-time (PT) symmetry in optics, we here propose a new avenue in realizing single-mode large area laser amplifiers. This can be accomplished by utilizing the abrupt symmetry breaking transition that allows the fundamental mode to experience gain while keeping all the higher order modes neutral. Such PT-symmetric structures can be realized by judiciously coupling two multimode waveguides, one exhibiting gain while the other exhibits an equal amount of loss. Pertinent examples are provided for both semiconductor and fiber laser amplifiers.
authors.affiliation: CREOL, College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816–2700, USA. miri@knights.ucf.edu
authors.forename: Mohammad-Ali
authors.initials: MA
authors.lastname: Miri
authors.forename: Patrik
authors.initials: P
authors.lastname: LiKamWa
authors.forename: Demetrios N
authors.initials: DN
authors.lastname: Christodoulides