Coherent instabilities in a semiconductor laser with fast gain recovery

作     者：Christine Y. Wang L. Diehl A. Gordon C. Jirauschek F. X. Kärtner A. Belyanin D. Bour S. Corzine G. Höfler M. Troccoli J. Faist Federico Capasso 

作者机构：Department of Physics Harvard University Cambridge Massachusetts 02138 USA School of Engineering and Applied Science Harvard University Cambridge Massachusetts 02138 USA Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge Massachusetts 02139 USA Department of Physics Texas A & M University College Station Texas 77843 USA Agilent Technologies Palo Alto California 94306 USA Institute of Physics University of Neuchâtel CH-2000 Neuchâtel Switzerland 

出 版 物：《Physical Review A》 (物理学评论A辑：原子、分子和光学物理学)

年 卷 期：2007年第75卷第3期

页      面：031802(R)-031802(R)页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

主　　题：QUANTUM CASCADE LASERS MODE-LOCKING OPERATION FREQUENCY STATES 

摘      要：We report the observation of a coherent multimode instability in quantum cascade lasers (QCLs), which is driven by the same fundamental mechanism of Rabi oscillations as the elusive Risken-Nummedal-Graham-Haken (RNGH) instability predicted 40years ago for ring lasers. The threshold of the observed instability is significantly lower than in the original RNGH instability, which we attribute to saturable-absorption nonlinearity in the laser. Coherent effects, which cannot be reproduced by standard laser rate equations, can play therefore a key role in the multimode dynamics of QCLs, and in lasers with fast gain recovery in general.