Abstract

Polarization self-selection in passive phasing of four fiber amplifiers with an all-optical feedback loop is demonstrated. The polarization extinction ratio (PER) of the combined beam is increased, and the polarized direction is selected with the use of a polarization-maintaining (PM) isolator and some non-PM components. The best visibility of the interference patterns is observed at 95.2% and in the largest increment in the PER of the combined beam up to 7.4 dB. Results show that all PM components are unnecessary in the coherent beam combination with an all-optical feedback loop, whereas non-PM components have good potential to achieve high output power.

© 2012 Optical Society of America

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2012 (4)

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

J. Zhu, X. Wang, Y. Ma, W. Du, X. Dong, P. Zhou, and X. Xu, “Experimental study on the polarization extinction ratio degradation in high power hybrid fiber amplifier chains employing PM/non-PM Yb-doped fibers,” Opt. Laser Technol. 44, 35–38 (2012).
[CrossRef]

Z. Li, J. Zhou, B. He, Y. Xue, P. Zhou, C. Liu, Y. Qi, Q. Lou, and X. Xu, “Impact of phase perturbation on passive phase-locking coherent beam combination,” IEEE Photon. Technol. Lett. 24, 655–657 (2012).
[CrossRef]

Y. Xue, B. He, J. Zhou, J. Xue, Z. Li, H. Liu, and Q. Lou, “Array size scaling of passive coherent beam combination in fiber laser array,” Chin. Opt. Lett. 10, 011401 (2012).
[CrossRef]

2011 (4)

2010 (2)

2009 (3)

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

O. Fitzau, J. Geiger, and H. Hoffmann, “Experimental and theoretical studies on kW class polarized fiber lasers for CW operation,” Proc. SPIE 7195, 719509 (2009).
[CrossRef]

B. Wang, E. Mies, M. Minden, and A. Sanchez, “All-fiber 50 W coherently combined passive laser array,” Opt. Lett. 34, 863–865 (2009).
[CrossRef]

2008 (1)

2007 (1)

2006 (2)

B. He, Q. Lou, J. Zhou, J. Dong, Y. Wei, D. Xue, Y. Qi, Z. Su, L. Li, and F. Zhang, “High power coherent beam combination from two fiber laser,” Opt. Express 14, 2721–2726 (2006).
[CrossRef]

J. Anderegg, S. Brosnan, E. Cheung, P. Epp, D. Hammous, H. Komine, M. Weber, and M. Wickham, “Coherently coupled high power fiber arrays,” Proc. SPIE 6102, 61020U (2006).
[CrossRef]

2003 (1)

1981 (1)

I. Kaminow, “Polarization in optical fibers,” IEEE J. Quantum Electron. 17, 15–22 (1981).
[CrossRef]

Anderegg, J.

J. Anderegg, S. Brosnan, E. Cheung, P. Epp, D. Hammous, H. Komine, M. Weber, and M. Wickham, “Coherently coupled high power fiber arrays,” Proc. SPIE 6102, 61020U (2006).
[CrossRef]

August, S. J.

Baker, J.

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

Barthelemy, A.

Barty, C. P. J.

Beach, R. J.

Bochove, E. J.

Bronder, C.

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

Brosnan, S.

J. Anderegg, S. Brosnan, E. Cheung, P. Epp, D. Hammous, H. Komine, M. Weber, and M. Wickham, “Coherently coupled high power fiber arrays,” Proc. SPIE 6102, 61020U (2006).
[CrossRef]

Cheo, P. K.

Cheung, E.

J. Anderegg, S. Brosnan, E. Cheung, P. Epp, D. Hammous, H. Komine, M. Weber, and M. Wickham, “Coherently coupled high power fiber arrays,” Proc. SPIE 6102, 61020U (2006).
[CrossRef]

Clarkson, W. A.

Dawson, J. W.

Desfarges-Berthelemot, A.

Ding, Y.

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

Dong, J.

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

B. He, Q. Lou, J. Zhou, J. Dong, Y. Wei, D. Xue, Y. Qi, Z. Su, L. Li, and F. Zhang, “High power coherent beam combination from two fiber laser,” Opt. Express 14, 2721–2726 (2006).
[CrossRef]

Dong, X.

J. Zhu, X. Wang, Y. Ma, W. Du, X. Dong, P. Zhou, and X. Xu, “Experimental study on the polarization extinction ratio degradation in high power hybrid fiber amplifier chains employing PM/non-PM Yb-doped fibers,” Opt. Laser Technol. 44, 35–38 (2012).
[CrossRef]

Y. Ma, X. Wang, J. Leng, H. Xiao, X. Dong, J. Zhu, W. Du, P. Zhou, X. Xu, L. Si, Z. Liu, and Y. Zhao, “Coherent beam combination of 1.08 kW fiber amplifier array using single frequency dithering technique,” Opt. Lett. 36, 951–953(2011).
[CrossRef]

Du, W.

J. Zhu, X. Wang, Y. Ma, W. Du, X. Dong, P. Zhou, and X. Xu, “Experimental study on the polarization extinction ratio degradation in high power hybrid fiber amplifier chains employing PM/non-PM Yb-doped fibers,” Opt. Laser Technol. 44, 35–38 (2012).
[CrossRef]

Y. Ma, X. Wang, J. Leng, H. Xiao, X. Dong, J. Zhu, W. Du, P. Zhou, X. Xu, L. Si, Z. Liu, and Y. Zhao, “Coherent beam combination of 1.08 kW fiber amplifier array using single frequency dithering technique,” Opt. Lett. 36, 951–953(2011).
[CrossRef]

Epp, P.

J. Anderegg, S. Brosnan, E. Cheung, P. Epp, D. Hammous, H. Komine, M. Weber, and M. Wickham, “Coherently coupled high power fiber arrays,” Proc. SPIE 6102, 61020U (2006).
[CrossRef]

Fan, T. Y.

Fan, Y.

Y. Xue, B. He, J. Zhou, Z. Li, Y. Fan, Y. Qi, C. Liu, Z. Yuan, H. Zhang, and Q. Lou, “High power passive phase locking of four Yb-doped fiber amplifiers by an all-optical feedback loop,” Chin. Phys. Lett. 28, 054212 (2011).
[CrossRef]

Fitzau, O.

O. Fitzau, J. Geiger, and H. Hoffmann, “Experimental and theoretical studies on kW class polarized fiber lasers for CW operation,” Proc. SPIE 7195, 719509 (2009).
[CrossRef]

Gallant, D.

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

Geiger, J.

O. Fitzau, J. Geiger, and H. Hoffmann, “Experimental and theoretical studies on kW class polarized fiber lasers for CW operation,” Proc. SPIE 7195, 719509 (2009).
[CrossRef]

Goldizen, K. C.

Hammous, D.

J. Anderegg, S. Brosnan, E. Cheung, P. Epp, D. Hammous, H. Komine, M. Weber, and M. Wickham, “Coherently coupled high power fiber arrays,” Proc. SPIE 6102, 61020U (2006).
[CrossRef]

He, B.

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

Z. Li, J. Zhou, B. He, Y. Xue, P. Zhou, C. Liu, Y. Qi, Q. Lou, and X. Xu, “Impact of phase perturbation on passive phase-locking coherent beam combination,” IEEE Photon. Technol. Lett. 24, 655–657 (2012).
[CrossRef]

Y. Xue, B. He, J. Zhou, J. Xue, Z. Li, H. Liu, and Q. Lou, “Array size scaling of passive coherent beam combination in fiber laser array,” Chin. Opt. Lett. 10, 011401 (2012).
[CrossRef]

Y. Xue, B. He, J. Zhou, Z. Li, Y. Fan, Y. Qi, C. Liu, Z. Yuan, H. Zhang, and Q. Lou, “High power passive phase locking of four Yb-doped fiber amplifiers by an all-optical feedback loop,” Chin. Phys. Lett. 28, 054212 (2011).
[CrossRef]

W. Wang, B. He, H. Zhang, Y. Xue, Z. Li, X. Liu, J. Zhou, and Q. Lou, “134 W phase locking of two-dimensional four-fiber lasers with improved self-imaging resonator,” Chin. Opt. Lett. 8, 680–682 (2010).
[CrossRef]

B. He, Q. Lou, J. Zhou, J. Dong, Y. Wei, D. Xue, Y. Qi, Z. Su, L. Li, and F. Zhang, “High power coherent beam combination from two fiber laser,” Opt. Express 14, 2721–2726 (2006).
[CrossRef]

Heebner, J. E.

Hoffmann, H.

O. Fitzau, J. Geiger, and H. Hoffmann, “Experimental and theoretical studies on kW class polarized fiber lasers for CW operation,” Proc. SPIE 7195, 719509 (2009).
[CrossRef]

Jiao, M.

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

Kaminow, I.

I. Kaminow, “Polarization in optical fibers,” IEEE J. Quantum Electron. 17, 15–22 (1981).
[CrossRef]

Kermene, V.

King, G. G.

Komine, H.

J. Anderegg, S. Brosnan, E. Cheung, P. Epp, D. Hammous, H. Komine, M. Weber, and M. Wickham, “Coherently coupled high power fiber arrays,” Proc. SPIE 6102, 61020U (2006).
[CrossRef]

Leng, J.

Lhermite, J.

Li, L.

Li, Z.

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

Z. Li, J. Zhou, B. He, Y. Xue, P. Zhou, C. Liu, Y. Qi, Q. Lou, and X. Xu, “Impact of phase perturbation on passive phase-locking coherent beam combination,” IEEE Photon. Technol. Lett. 24, 655–657 (2012).
[CrossRef]

Y. Xue, B. He, J. Zhou, J. Xue, Z. Li, H. Liu, and Q. Lou, “Array size scaling of passive coherent beam combination in fiber laser array,” Chin. Opt. Lett. 10, 011401 (2012).
[CrossRef]

Y. Xue, B. He, J. Zhou, Z. Li, Y. Fan, Y. Qi, C. Liu, Z. Yuan, H. Zhang, and Q. Lou, “High power passive phase locking of four Yb-doped fiber amplifiers by an all-optical feedback loop,” Chin. Phys. Lett. 28, 054212 (2011).
[CrossRef]

W. Wang, B. He, H. Zhang, Y. Xue, Z. Li, X. Liu, J. Zhou, and Q. Lou, “134 W phase locking of two-dimensional four-fiber lasers with improved self-imaging resonator,” Chin. Opt. Lett. 8, 680–682 (2010).
[CrossRef]

Liu, C.

Z. Li, J. Zhou, B. He, Y. Xue, P. Zhou, C. Liu, Y. Qi, Q. Lou, and X. Xu, “Impact of phase perturbation on passive phase-locking coherent beam combination,” IEEE Photon. Technol. Lett. 24, 655–657 (2012).
[CrossRef]

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

Y. Xue, B. He, J. Zhou, Z. Li, Y. Fan, Y. Qi, C. Liu, Z. Yuan, H. Zhang, and Q. Lou, “High power passive phase locking of four Yb-doped fiber amplifiers by an all-optical feedback loop,” Chin. Phys. Lett. 28, 054212 (2011).
[CrossRef]

Liu, H.

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

Y. Xue, B. He, J. Zhou, J. Xue, Z. Li, H. Liu, and Q. Lou, “Array size scaling of passive coherent beam combination in fiber laser array,” Chin. Opt. Lett. 10, 011401 (2012).
[CrossRef]

Liu, X.

Liu, Z.

Lou, Q.

Y. Xue, B. He, J. Zhou, J. Xue, Z. Li, H. Liu, and Q. Lou, “Array size scaling of passive coherent beam combination in fiber laser array,” Chin. Opt. Lett. 10, 011401 (2012).
[CrossRef]

Z. Li, J. Zhou, B. He, Y. Xue, P. Zhou, C. Liu, Y. Qi, Q. Lou, and X. Xu, “Impact of phase perturbation on passive phase-locking coherent beam combination,” IEEE Photon. Technol. Lett. 24, 655–657 (2012).
[CrossRef]

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

Y. Xue, B. He, J. Zhou, Z. Li, Y. Fan, Y. Qi, C. Liu, Z. Yuan, H. Zhang, and Q. Lou, “High power passive phase locking of four Yb-doped fiber amplifiers by an all-optical feedback loop,” Chin. Phys. Lett. 28, 054212 (2011).
[CrossRef]

W. Wang, B. He, H. Zhang, Y. Xue, Z. Li, X. Liu, J. Zhou, and Q. Lou, “134 W phase locking of two-dimensional four-fiber lasers with improved self-imaging resonator,” Chin. Opt. Lett. 8, 680–682 (2010).
[CrossRef]

B. He, Q. Lou, J. Zhou, J. Dong, Y. Wei, D. Xue, Y. Qi, Z. Su, L. Li, and F. Zhang, “High power coherent beam combination from two fiber laser,” Opt. Express 14, 2721–2726 (2006).
[CrossRef]

Lu, C.

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

Lucero, A.

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

Ma, Y.

Messerly, M. J.

Mies, E.

Minden, M.

Murphy, D. V.

Nilsson, J.

Pax, P. H.

Pulford, B.

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

Qi, Y.

Z. Li, J. Zhou, B. He, Y. Xue, P. Zhou, C. Liu, Y. Qi, Q. Lou, and X. Xu, “Impact of phase perturbation on passive phase-locking coherent beam combination,” IEEE Photon. Technol. Lett. 24, 655–657 (2012).
[CrossRef]

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

Y. Xue, B. He, J. Zhou, Z. Li, Y. Fan, Y. Qi, C. Liu, Z. Yuan, H. Zhang, and Q. Lou, “High power passive phase locking of four Yb-doped fiber amplifiers by an all-optical feedback loop,” Chin. Phys. Lett. 28, 054212 (2011).
[CrossRef]

B. He, Q. Lou, J. Zhou, J. Dong, Y. Wei, D. Xue, Y. Qi, Z. Su, L. Li, and F. Zhang, “High power coherent beam combination from two fiber laser,” Opt. Express 14, 2721–2726 (2006).
[CrossRef]

Redmond, S. M.

Richardson, D. J.

Robin, C.

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

Sanchez, A.

C. X. Yu, S. J. August, 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).
[CrossRef]

B. Wang, E. Mies, M. Minden, and A. Sanchez, “All-fiber 50 W coherently combined passive laser array,” Opt. Lett. 34, 863–865 (2009).
[CrossRef]

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

Shay, T.

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

Shverdin, M. Y.

Si, L.

Siders, C. W.

Sridharan, A. K.

Stappaerts, E. A.

Su, Z.

Vergien, L.

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

Wang, B.

Wang, W.

Wang, X.

Weber, M.

J. Anderegg, S. Brosnan, E. Cheung, P. Epp, D. Hammous, H. Komine, M. Weber, and M. Wickham, “Coherently coupled high power fiber arrays,” Proc. SPIE 6102, 61020U (2006).
[CrossRef]

Wei, Y.

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

B. He, Q. Lou, J. Zhou, J. Dong, Y. Wei, D. Xue, Y. Qi, Z. Su, L. Li, and F. Zhang, “High power coherent beam combination from two fiber laser,” Opt. Express 14, 2721–2726 (2006).
[CrossRef]

Wickham, M.

J. Anderegg, S. Brosnan, E. Cheung, P. Epp, D. Hammous, H. Komine, M. Weber, and M. Wickham, “Coherently coupled high power fiber arrays,” Proc. SPIE 6102, 61020U (2006).
[CrossRef]

Xiao, H.

Xu, X.

J. Zhu, X. Wang, Y. Ma, W. Du, X. Dong, P. Zhou, and X. Xu, “Experimental study on the polarization extinction ratio degradation in high power hybrid fiber amplifier chains employing PM/non-PM Yb-doped fibers,” Opt. Laser Technol. 44, 35–38 (2012).
[CrossRef]

Z. Li, J. Zhou, B. He, Y. Xue, P. Zhou, C. Liu, Y. Qi, Q. Lou, and X. Xu, “Impact of phase perturbation on passive phase-locking coherent beam combination,” IEEE Photon. Technol. Lett. 24, 655–657 (2012).
[CrossRef]

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).
[CrossRef]

Y. Ma, X. Wang, J. Leng, H. Xiao, X. Dong, J. Zhu, W. Du, P. Zhou, X. Xu, L. Si, Z. Liu, and Y. Zhao, “Coherent beam combination of 1.08 kW fiber amplifier array using single frequency dithering technique,” Opt. Lett. 36, 951–953(2011).
[CrossRef]

Xue, D.

Xue, J.

Xue, Y.

Y. Xue, B. He, J. Zhou, J. Xue, Z. Li, H. Liu, and Q. Lou, “Array size scaling of passive coherent beam combination in fiber laser array,” Chin. Opt. Lett. 10, 011401 (2012).
[CrossRef]

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

Z. Li, J. Zhou, B. He, Y. Xue, P. Zhou, C. Liu, Y. Qi, Q. Lou, and X. Xu, “Impact of phase perturbation on passive phase-locking coherent beam combination,” IEEE Photon. Technol. Lett. 24, 655–657 (2012).
[CrossRef]

Y. Xue, B. He, J. Zhou, Z. Li, Y. Fan, Y. Qi, C. Liu, Z. Yuan, H. Zhang, and Q. Lou, “High power passive phase locking of four Yb-doped fiber amplifiers by an all-optical feedback loop,” Chin. Phys. Lett. 28, 054212 (2011).
[CrossRef]

W. Wang, B. He, H. Zhang, Y. Xue, Z. Li, X. Liu, J. Zhou, and Q. Lou, “134 W phase locking of two-dimensional four-fiber lasers with improved self-imaging resonator,” Chin. Opt. Lett. 8, 680–682 (2010).
[CrossRef]

Yu, C. X.

Yuan, Z.

Y. Xue, B. He, J. Zhou, Z. Li, Y. Fan, Y. Qi, C. Liu, Z. Yuan, H. Zhang, and Q. Lou, “High power passive phase locking of four Yb-doped fiber amplifiers by an all-optical feedback loop,” Chin. Phys. Lett. 28, 054212 (2011).
[CrossRef]

Zerinque, C.

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

Zhang, F.

Zhang, H.

Y. Xue, B. He, J. Zhou, Z. Li, Y. Fan, Y. Qi, C. Liu, Z. Yuan, H. Zhang, and Q. Lou, “High power passive phase locking of four Yb-doped fiber amplifiers by an all-optical feedback loop,” Chin. Phys. Lett. 28, 054212 (2011).
[CrossRef]

W. Wang, B. He, H. Zhang, Y. Xue, Z. Li, X. Liu, J. Zhou, and Q. Lou, “134 W phase locking of two-dimensional four-fiber lasers with improved self-imaging resonator,” Chin. Opt. Lett. 8, 680–682 (2010).
[CrossRef]

Zhao, Y.

Zhou, J.

Y. Xue, B. He, J. Zhou, J. Xue, Z. Li, H. Liu, and Q. Lou, “Array size scaling of passive coherent beam combination in fiber laser array,” Chin. Opt. Lett. 10, 011401 (2012).
[CrossRef]

Z. Li, J. Zhou, B. He, Y. Xue, P. Zhou, C. Liu, Y. Qi, Q. Lou, and X. Xu, “Impact of phase perturbation on passive phase-locking coherent beam combination,” IEEE Photon. Technol. Lett. 24, 655–657 (2012).
[CrossRef]

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

Y. Xue, B. He, J. Zhou, Z. Li, Y. Fan, Y. Qi, C. Liu, Z. Yuan, H. Zhang, and Q. Lou, “High power passive phase locking of four Yb-doped fiber amplifiers by an all-optical feedback loop,” Chin. Phys. Lett. 28, 054212 (2011).
[CrossRef]

W. Wang, B. He, H. Zhang, Y. Xue, Z. Li, X. Liu, J. Zhou, and Q. Lou, “134 W phase locking of two-dimensional four-fiber lasers with improved self-imaging resonator,” Chin. Opt. Lett. 8, 680–682 (2010).
[CrossRef]

B. He, Q. Lou, J. Zhou, J. Dong, Y. Wei, D. Xue, Y. Qi, Z. Su, L. Li, and F. Zhang, “High power coherent beam combination from two fiber laser,” Opt. Express 14, 2721–2726 (2006).
[CrossRef]

Zhou, P.

Z. Li, J. Zhou, B. He, Y. Xue, P. Zhou, C. Liu, Y. Qi, Q. Lou, and X. Xu, “Impact of phase perturbation on passive phase-locking coherent beam combination,” IEEE Photon. Technol. Lett. 24, 655–657 (2012).
[CrossRef]

J. Zhu, X. Wang, Y. Ma, W. Du, X. Dong, P. Zhou, and X. Xu, “Experimental study on the polarization extinction ratio degradation in high power hybrid fiber amplifier chains employing PM/non-PM Yb-doped fibers,” Opt. Laser Technol. 44, 35–38 (2012).
[CrossRef]

Y. Ma, X. Wang, J. Leng, H. Xiao, X. Dong, J. Zhu, W. Du, P. Zhou, X. Xu, L. Si, Z. Liu, and Y. Zhao, “Coherent beam combination of 1.08 kW fiber amplifier array using single frequency dithering technique,” Opt. Lett. 36, 951–953(2011).
[CrossRef]

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).
[CrossRef]

Zhu, J.

J. Zhu, X. Wang, Y. Ma, W. Du, X. Dong, P. Zhou, and X. Xu, “Experimental study on the polarization extinction ratio degradation in high power hybrid fiber amplifier chains employing PM/non-PM Yb-doped fibers,” Opt. Laser Technol. 44, 35–38 (2012).
[CrossRef]

Y. Ma, X. Wang, J. Leng, H. Xiao, X. Dong, J. Zhu, W. Du, P. Zhou, X. Xu, L. Si, Z. Liu, and Y. Zhao, “Coherent beam combination of 1.08 kW fiber amplifier array using single frequency dithering technique,” Opt. Lett. 36, 951–953(2011).
[CrossRef]

Chin. Opt. Lett. (2)

Chin. Phys. Lett. (2)

Y. Xue, B. He, J. Zhou, Z. Li, Y. Fan, Y. Qi, C. Liu, Z. Yuan, H. Zhang, and Q. Lou, “High power passive phase locking of four Yb-doped fiber amplifiers by an all-optical feedback loop,” Chin. Phys. Lett. 28, 054212 (2011).
[CrossRef]

H. Liu, Y. Xue, Z. Li, B. He, J. Zhou, Y. Ding, M. Jiao, C. Liu, Y. Qi, Y. Wei, J. Dong, and Q. Lou, “Improved power of central lobe in beam combination and high power output,” Chin. Phys. Lett. 29, 044204 (2012).
[CrossRef]

IEEE J. Quantum Electron. (1)

I. Kaminow, “Polarization in optical fibers,” IEEE J. Quantum Electron. 17, 15–22 (1981).
[CrossRef]

IEEE Photon. Technol. Lett. (1)

Z. Li, J. Zhou, B. He, Y. Xue, P. Zhou, C. Liu, Y. Qi, Q. Lou, and X. Xu, “Impact of phase perturbation on passive phase-locking coherent beam combination,” IEEE Photon. Technol. Lett. 24, 655–657 (2012).
[CrossRef]

J. Opt. Soc. Am. B (1)

Opt. Express (2)

Opt. Laser Technol. (1)

J. Zhu, X. Wang, Y. Ma, W. Du, X. Dong, P. Zhou, and X. Xu, “Experimental study on the polarization extinction ratio degradation in high power hybrid fiber amplifier chains employing PM/non-PM Yb-doped fibers,” Opt. Laser Technol. 44, 35–38 (2012).
[CrossRef]

Opt. Lett. (6)

Proc. SPIE (3)

J. Anderegg, S. Brosnan, E. Cheung, P. Epp, D. Hammous, H. Komine, M. Weber, and M. Wickham, “Coherently coupled high power fiber arrays,” Proc. SPIE 6102, 61020U (2006).
[CrossRef]

T. Shay, J. Baker, A. Sanchez, C. Robin, L. Vergien, C. Zerinque, A. Sanchez, D. Gallant, C. Lu, B. Pulford, C. Bronder, and A. Lucero, “High power phase locking of a fiber amplifier array,” Proc. SPIE 7195, 71951M (2009).

O. Fitzau, J. Geiger, and H. Hoffmann, “Experimental and theoretical studies on kW class polarized fiber lasers for CW operation,” Proc. SPIE 7195, 719509 (2009).
[CrossRef]

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Figures (3)

Fig. 1.
Fig. 1.

Experimental setups. ISO, isolator; GT, Glan-Taylor prism; CO, collimator; BS, beam splitter; PA, preamplifier in feedback loop; PC, polarization controller; A, amplifier; L, lens; LD, laser diode; CCD, charge-coupled-device camera; PMSMF, polarization-maintaining single-mode feedback fiber.

Fig. 2.
Fig. 2.

(a) Near-field distribution, and (b) far-field theoretical interference patterns in phase locking.

Fig. 3.
Fig. 3.

Interference patterns of the in-phase mode in experiments (a), (b), (c), and (d).

Tables (1)

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Table 1. Experimental Results

Equations (1)

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LB=λ/B,

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