1.2 kW Average Power from Coherently Combined Single-Frequency Nanosecond All-Fiber Amplifier Array
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概要
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We report coherent combining of seven nanosecond all-fiber amplifier array with overall average power of 1.2 kW. The power amplifier array consisted of seven three-stage cascaded all-fiber amplifier. The temporal overlap of pulses from different amplifiers was realized by strictly controlling optical path difference (OPD). When the laser beams were actively phase-locked using single frequency dithering technique, the contrast of long-exposure far-field intensity pattern of the combined beam was more than 89.1%. The combined pulsed laser has a pulse width of {\sim}3 ns, a repetition rate of 5 MHz and a peak power of 75.1 kW.
- 2013-12-25
著者
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Ma Yanxing
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
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Su Rongtao
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
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Zhou Pu
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
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Wang Xiaolin
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
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Xu Xiaojun
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China