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http://dx.doi.org/10.3807/COPP.2018.2.5.431

High Power Coherent Beam Combining Setup Using Modified Cascaded Multi-dithering Technique  

Ahn, Hee Kyung (Space Optics Team, Advanced Instrumentation Institute, Korea Research Institute of Standards and Science)
Lee, Hwihyeong (Space Optics Team, Advanced Instrumentation Institute, Korea Research Institute of Standards and Science)
Kong, Hong Jin (Korea Advanced Institute of Science and Technology)
Publication Information
Current Optics and Photonics / v.2, no.5, 2018 , pp. 431-435 More about this Journal
Abstract
A modified setup of a CMD technique for high power coherent beam combining was presented to address an issue of low damage threshold of electro-optic modulators. The feasibility of the modified setup was demonstrated by combining eight fiber beams, and it was successfully performed with ${\lambda}/44$ of residual phase error and 100 Hz of control bandwidth. It is expected that the modified CMD setup facilitates ultra-high power coherent beam combination without a limitation caused by the low damage threshold of electro-optic modulators.
Keywords
High power laser; Phase extraction;
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1 P. Zhou, Z. Liu, X. Wang, Y. Ma, H. Ma, X. Xu, and S. Guo, "Coherent beam combining of fiber amplifiers using stochastic parallel gradient descent algorithm and its application," IEEE J. Sel. Top. Quantum Electron. 15, 248-256 (2009).   DOI
2 A. Flores, T. M. Shay, C. A. Lu, C. Robin, B. Pulford, A. D. Sanchez, D. W. Hult, and K. B. Rowland, "Coherent beam combining of fiber amplifiers in a kW regime," in Proc. CLEO:2011 - Laser Applications to Photonic Applications (United States, May 2011), paper CFE3.
3 H. K. Ahn and H. J. Kong, "Cascaded multi-dithering technique using PZT modulators for high control bandwidth in coherent beam combining," Appl. Phys. B 123, 241 (2017).
4 J. Anderegg, S. Brosnan, M. Weber, H. Komine, and M. Wickham, "8-W coherently phased 4-element fiber array," Proc. SPIE 4974, 1-6 (2003).
5 R. Xiao, J. Hou, M. Liu, and Z. F. Jiang, "Coherent combining technology of master oscillator power amplifier fiber arrays," Opt. Express 16, 2015-2022 (2008).   DOI
6 S. J. Augst, J. K. Ranka, T. Y. Fan, and A. Sanchez, "Beam combining of ytterbium fiber amplifiers," J. Opt. Soc. Am. B 24, 1707-1715 (2007).   DOI
7 L. Liu and M. A. Vorontsov, "Phase-locking of tiled fiber array using SPGD feedback controller," Proc. SPIE 5895, 58950P (2005).
8 C. X. Yu, S. J. Augst, S. M. Redmond, K. C. Goldizen, D. V. Murphy, A. Sanchez, and T. Y. Fan, "Coherent combining of a 4 kW, eight-element fiber amplifier array," Opt. Lett. 36, 2686-2688 (2011).   DOI
9 X. Wang, P. Zhou, Y. Ma, J. Leng, X. Xu, and Z. Liu, "Active phasing a nine-element 1.14 kW all-fiber two-tone MOPA array using SPGD algorithm," Opt. Lett. 36, 3121-3123 (2011).   DOI
10 T. M. Shay, "Theory of electronically phased coherent beam combination without a reference beam," Opt. Express 14, 12188-12195 (2006).   DOI
11 H. K. Ahn and H. J. Kong, "Cascaded multi-dithering theory for coherent beam combining of multiplexed beam elements," Opt. Express 23, 12407-12413 (2015).   DOI
12 T. M. Shay, V. Benham, J. T. Baker, A. D. Sanchez, D. Pilkington, and C. A. Lu, "Self-synchronous and self-referenced coherent beam combination for large optical arrays," IEEE J. Sel. Top. Quantum Electron. 13, 480-486 (2007).   DOI
13 B. N. Pulford, "LOCSET phase locking: operation, diagnostics, and applications," Ph. D. Dissertation, The University of New Mexico (2011).
14 A. Azarian, P. Bourdon, L. Lombard, Y. Jaouën, and O. Vasseur, "Orthogonal coding methods for increasing the number of multiplexed channels in coherent beam combining," Appl. Opt. 53, 1493-1502 (2014).   DOI
15 H. K. Ahn and H. J. Kong, "Feasibility of cascaded multidithering technique for coherent addition of a large number of beam elements," Appl. Opt. 55, 4101-4108 (2016).   DOI
16 https://www.newport.com/n/electro-optic-modulator-faqs.
17 A. Brignon, Coherent laser beam combining (Wiley-VCH Verlag GmbH & Co., 2013).
18 D. C. Jones, A. M. Scott, and S. Clark, "Beam steering of a fibre bundle laser output using phased array techniques," Proc. SPIE 5335, 125-131 (2004).
19 S. J. Augst, T. Y. Fan, and Antonio Sanchez, "Coherent beam combining and phase noise measurements of ytterbium fiber amplifiers," Opt. Lett. 29, 474-476 (2004).   DOI