Coherent Coupling of Multiple Transverse Modes in Quantum Cascade Lasers

被引:54
作者
Yu, Nanfang [2 ]
Diehl, Laurent [2 ]
Cubukcu, Ertugrul [2 ]
Bour, David [3 ]
Corzine, Scott [3 ]
Hoefler, Gloria [3 ]
Wojcik, Aleksander K. [1 ]
Crozier, Kenneth B. [2 ]
Belyanin, Alexey [1 ]
Capasso, Federico [2 ]
机构
[1] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA
[2] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA
[3] Agilent Labs, Palo Alto, CA 94304 USA
关键词
SEMICONDUCTOR-LASERS; POWER; OPERATION; LOCKING;
D O I
10.1103/PhysRevLett.102.013901
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Quantum cascade lasers are a unique laboratory for studying nonlinear laser dynamics because of their high intracavity intensity, strong intersubband optical nonlinearity, and an unusual combination of relaxation time scales. Here we investigate the nonlinear coupling between the transverse modes of quantum cascade lasers. We present evidence for stable phase coherence of multiple transverse modes over a large range of injection currents. We explain the phase coherence by a four-wave mixing interaction originating from the strong optical nonlinearity of the gain transition. The phase-locking conditions predicted by theory are supported by spectral data and both near- and far-field mode measurements.
引用
收藏
页数:4
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