Abstract

Coherent beam combining enables power scaling beyond the limits of single amplifiers. Therefore, improving the performance and simplicity of coherent combination techniques is of great interest for many high power applications. Here, we show all-fiber coherent beam combining of two ytterbium doped amplifiers with and without a dedicated phase actuator and a total output power up to 25 W. Instead of a dedicated phase actuator, we directly controlled the two ytterbium amplifiers to also stabilize their relative phase. We compared the performance of this method with phase stabilization using two piezo driven fiber stretchers. In both cases, power noise was dominated by the single amplifier.

© 2012 Optical Society of America

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References

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2011 (4)

2010 (1)

2009 (1)

2008 (1)

Alley, T. G.

Antipov, O. L.

Bourdon, P.

Bratcher, A.

Breitkopf, S.

Cheung, E. C.

Daniault, L.

Druon, F.

Flores, A.

A. Flores, T. M. Shay, C. A. Lu, C. Robin, B. Pulford, A. D. Sanchez, D. W. Hult, and K. B. Rowland, in CLEO (2011), paper CFE3.

Flores, A. S.

Fotiadi, A. A.

Frede, M.

T. Theeg, K. Hausmann, M. Frede, H. Sayinc, J. Neumann, and D. Kracht, in CLEO/Europe and EQEC (2011), paper CJ2_1.

Georges, P.

Goodno, G. D.

Goular, D.

Hanna, M.

Hausmann, K.

T. Theeg, K. Hausmann, M. Frede, H. Sayinc, J. Neumann, and D. Kracht, in CLEO/Europe and EQEC (2011), paper CJ2_1.

Ho, J. G.

Hult, D. W.

A. Flores, T. M. Shay, C. A. Lu, C. Robin, B. Pulford, A. D. Sanchez, D. W. Hult, and K. B. Rowland, in CLEO (2011), paper CFE3.

Klenke, A.

Kracht, D.

Limpert, J.

Lombard, L.

Lu, C. A.

A. Flores, T. M. Shay, C. A. Lu, C. Robin, B. Pulford, A. D. Sanchez, D. W. Hult, and K. B. Rowland, in CLEO (2011), paper CFE3.

Mégret, P.

Minden, M.

M. Minden, “Phase control mechanism for coherent fiber amplifier arrays,” U.S. patent 6,400,871 (June 4, 2002).

Mottay, E.

Neumann, J.

Pöld, J. H.

Pulford, B.

R. Uberna, A. Bratcher, T. G. Alley, A. D. Sanchez, A. S. Flores, and B. Pulford, Opt. Express 18, 13547 (2010).
[CrossRef]

A. Flores, T. M. Shay, C. A. Lu, C. Robin, B. Pulford, A. D. Sanchez, D. W. Hult, and K. B. Rowland, in CLEO (2011), paper CFE3.

Rice, R. R.

Robin, C.

A. Flores, T. M. Shay, C. A. Lu, C. Robin, B. Pulford, A. D. Sanchez, D. W. Hult, and K. B. Rowland, in CLEO (2011), paper CFE3.

Rothenberg, J.

Rowland, K. B.

A. Flores, T. M. Shay, C. A. Lu, C. Robin, B. Pulford, A. D. Sanchez, D. W. Hult, and K. B. Rowland, in CLEO (2011), paper CFE3.

Sanchez, A. D.

R. Uberna, A. Bratcher, T. G. Alley, A. D. Sanchez, A. S. Flores, and B. Pulford, Opt. Express 18, 13547 (2010).
[CrossRef]

A. Flores, T. M. Shay, C. A. Lu, C. Robin, B. Pulford, A. D. Sanchez, D. W. Hult, and K. B. Rowland, in CLEO (2011), paper CFE3.

Sayinc, H.

T. Theeg, K. Hausmann, M. Frede, H. Sayinc, J. Neumann, and D. Kracht, in CLEO/Europe and EQEC (2011), paper CJ2_1.

Seise, E.

Shay, T. M.

A. Flores, T. M. Shay, C. A. Lu, C. Robin, B. Pulford, A. D. Sanchez, D. W. Hult, and K. B. Rowland, in CLEO (2011), paper CFE3.

Theeg, T.

T. Theeg, K. Hausmann, M. Frede, H. Sayinc, J. Neumann, and D. Kracht, in CLEO/Europe and EQEC (2011), paper CJ2_1.

Thielen, P.

Tünnermann, A.

Tünnermann, H.

Uberna, R.

Weber, M.

Weßels, P.

Weßels, Peter

Wickham, M.

Willke, B.

Zakharov, N.

Zaouter, Y.

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Figures (4)

Fig. 1.
Fig. 1.

All-fiber CBC setup and stabilization via pump power modulation; (a) optical setup, (b) control path implementation in our setup, (c) possible extension to n amplifiers.

Fig. 2.
Fig. 2.

Slope for both actuation methods.

Fig. 3.
Fig. 3.

RPN in the frequency range from 1 Hz to 100 kHz.

Fig. 4.
Fig. 4.

Noise coupling from phase to power noise with the differential and single amplifier stabilization.

Equations (1)

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P=12((A1+ΔA1)±(A2+ΔA2))2.

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