期刊
IEEE JOURNAL OF QUANTUM ELECTRONICS
卷 45, 期 1-2, 页码 138-148出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JQE.2008.2002501
关键词
Fiber lasers; laser beam combining; laser propagation
资金
- Office of Naval Research and the High Energy Laser Joint Technology Office.
High-power fiber lasers can be incoherently combined to form the basis of a directed high-energy laser system which is highly efficient, compact, robust, low-maintenance and has a long operating lifetime. This approach has a number of advantages over other beam combining methods. We present results of the first field demonstration of incoherent beam combining using kilowatt-class, single-mode fiber lasers. The experiment combined four fiber lasers using a beam director consisting of individually controlled steering mirrors. Propagation efficiencies of similar to 90%, at a range of 1.2 kin, with transmitted continious-wave power levels of 3 kW were demonstrated in moderate atmospheric turbulence. We analyze the propagation of combined single-mode and multimode beams in atmospheric turbulence and find good agreement between theory, simulations and experiments.
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