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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Active coherent beam combining of a five-element, 800 W nanosecond fiber amplifier array
Rongtao Su1, Pu Zhou, Xiaolin Wang
1College of Optic-electric Science and Engineering, National University of Defense Technology, Changsha 410073, China.
Optics Letters
|October 3, 2012
Abstract:
Coherent beam combining of an 800 W nanosecond single-frequency fiber amplifier array has been demonstrated. Five high-power all-fiberized Yb-fiber amplifiers were tiled into a crisscross array, and the laser beams were actively phase-locked by using the stochastic parallel gradient descent algorithm. The contrast of the far-field intensity pattern of the combined beam was more than 91.6%. The combined pulsed laser has a pulse width of ~3.5 ns and a peak power of 21.5 kW.
