Abstract

We demonstrate a novel closed-loop approach for high-precision co-alignment of laser beams in an actively phase-locked, coherently combined fiber laser array. The approach ensures interferometric precision by optically transducing beam-to-beam pointing errors into phase errors on a single detector, which are subsequently nulled by duplication of closed-loop phasing controls. Using this approach, beams from five coherent fiber tips were simultaneously phase-locked and position-locked with sub-micron accuracy. Spatial filtering of the sensed light is shown to extend the control range over multiple beam diameters by recovering spatial coherence despite the lack of far-field beam overlap.

© 2012 OSA

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  1. C. X. Yu and T. Y. Fan, “Beam combining,” in High Power Laser Handbook, H. Injeyan and G. D. Goodno, eds (McGraw Hill, 2011), pp. 533–571.
  2. G. D. Goodno, C. C. Shih, and J. E. Rothenberg, “Perturbative analysis of coherent combining efficiency with mismatched lasers,” Opt. Express 18(24), 25403–25414 (2010).
    [CrossRef] [PubMed]
  3. S. M. Redmond, T. Y. Fan, D. Ripin, P. Thielen, J. Rothenberg, and G. Goodno, “Diffractive beam combining of a 2.5-kW fiber laser array,” in Lasers, Sources, and Related Photonic Devices, OSA Technical Digest (CD) (Optical Society of America, 2012), paper AM3A.1.
  4. T. R. O’Meara, “The multidither principle in adaptive optics,” J. Opt. Soc. Am. 67(3), 306–314 (1977).
    [CrossRef]
  5. T. M. Shay, “Theory of electronically phased coherent beam combination without a reference beam,” Opt. Express 14(25), 12188–12195 (2006).
    [CrossRef] [PubMed]
  6. M. A. Vorontsov and V. P. Sivokon, “Stochastic parallel-gradient-descent technique for high-resolution wave-front phase-distortion correction,” J. Opt. Soc. Am. A 15(10), 2745–2758 (1998).
    [CrossRef]
  7. M. A. Vorontsov, T. Weyrauch, L. A. Beresnev, G. W. Carhart, L. Liu, and K. Aschenbach, “Adaptive array of phase-locked fiber collimators: analysis and experimental demonstration,” IEEE J. Sel. Topics Quantum Electron. 15, 269–280 (2009).
  8. S. B. Weiss, M. E. Weber, and G. D. Goodno, “Group delay locking of coherently combined broadband lasers,” Opt. Lett. 37(4), 455–457 (2012).
    [CrossRef] [PubMed]
  9. R. Uberna, A. Bratcher, and B. G. Tiemann, “Coherent polarization beam combination,” IEEE J. Quantum Electron. 46(8), 1191–1196 (2010).
    [CrossRef]
  10. B. N. Pulford, “LOCSET phase locking: operation, diagnostics, and applications,” Ph.D. dissertation (Univ. of New Mexico, 2011).

2012 (1)

2010 (2)

G. D. Goodno, C. C. Shih, and J. E. Rothenberg, “Perturbative analysis of coherent combining efficiency with mismatched lasers,” Opt. Express 18(24), 25403–25414 (2010).
[CrossRef] [PubMed]

R. Uberna, A. Bratcher, and B. G. Tiemann, “Coherent polarization beam combination,” IEEE J. Quantum Electron. 46(8), 1191–1196 (2010).
[CrossRef]

2009 (1)

M. A. Vorontsov, T. Weyrauch, L. A. Beresnev, G. W. Carhart, L. Liu, and K. Aschenbach, “Adaptive array of phase-locked fiber collimators: analysis and experimental demonstration,” IEEE J. Sel. Topics Quantum Electron. 15, 269–280 (2009).

2006 (1)

1998 (1)

1977 (1)

Aschenbach, K.

M. A. Vorontsov, T. Weyrauch, L. A. Beresnev, G. W. Carhart, L. Liu, and K. Aschenbach, “Adaptive array of phase-locked fiber collimators: analysis and experimental demonstration,” IEEE J. Sel. Topics Quantum Electron. 15, 269–280 (2009).

Beresnev, L. A.

M. A. Vorontsov, T. Weyrauch, L. A. Beresnev, G. W. Carhart, L. Liu, and K. Aschenbach, “Adaptive array of phase-locked fiber collimators: analysis and experimental demonstration,” IEEE J. Sel. Topics Quantum Electron. 15, 269–280 (2009).

Bratcher, A.

R. Uberna, A. Bratcher, and B. G. Tiemann, “Coherent polarization beam combination,” IEEE J. Quantum Electron. 46(8), 1191–1196 (2010).
[CrossRef]

Carhart, G. W.

M. A. Vorontsov, T. Weyrauch, L. A. Beresnev, G. W. Carhart, L. Liu, and K. Aschenbach, “Adaptive array of phase-locked fiber collimators: analysis and experimental demonstration,” IEEE J. Sel. Topics Quantum Electron. 15, 269–280 (2009).

Goodno, G. D.

Liu, L.

M. A. Vorontsov, T. Weyrauch, L. A. Beresnev, G. W. Carhart, L. Liu, and K. Aschenbach, “Adaptive array of phase-locked fiber collimators: analysis and experimental demonstration,” IEEE J. Sel. Topics Quantum Electron. 15, 269–280 (2009).

O’Meara, T. R.

Rothenberg, J. E.

Shay, T. M.

Shih, C. C.

Sivokon, V. P.

Tiemann, B. G.

R. Uberna, A. Bratcher, and B. G. Tiemann, “Coherent polarization beam combination,” IEEE J. Quantum Electron. 46(8), 1191–1196 (2010).
[CrossRef]

Uberna, R.

R. Uberna, A. Bratcher, and B. G. Tiemann, “Coherent polarization beam combination,” IEEE J. Quantum Electron. 46(8), 1191–1196 (2010).
[CrossRef]

Vorontsov, M. A.

M. A. Vorontsov, T. Weyrauch, L. A. Beresnev, G. W. Carhart, L. Liu, and K. Aschenbach, “Adaptive array of phase-locked fiber collimators: analysis and experimental demonstration,” IEEE J. Sel. Topics Quantum Electron. 15, 269–280 (2009).

M. A. Vorontsov and V. P. Sivokon, “Stochastic parallel-gradient-descent technique for high-resolution wave-front phase-distortion correction,” J. Opt. Soc. Am. A 15(10), 2745–2758 (1998).
[CrossRef]

Weber, M. E.

Weiss, S. B.

Weyrauch, T.

M. A. Vorontsov, T. Weyrauch, L. A. Beresnev, G. W. Carhart, L. Liu, and K. Aschenbach, “Adaptive array of phase-locked fiber collimators: analysis and experimental demonstration,” IEEE J. Sel. Topics Quantum Electron. 15, 269–280 (2009).

IEEE J. Quantum Electron. (1)

R. Uberna, A. Bratcher, and B. G. Tiemann, “Coherent polarization beam combination,” IEEE J. Quantum Electron. 46(8), 1191–1196 (2010).
[CrossRef]

IEEE J. Sel. Topics Quantum Electron. (1)

M. A. Vorontsov, T. Weyrauch, L. A. Beresnev, G. W. Carhart, L. Liu, and K. Aschenbach, “Adaptive array of phase-locked fiber collimators: analysis and experimental demonstration,” IEEE J. Sel. Topics Quantum Electron. 15, 269–280 (2009).

J. Opt. Soc. Am. (1)

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

Opt. Express (2)

Opt. Lett. (1)

Other (3)

B. N. Pulford, “LOCSET phase locking: operation, diagnostics, and applications,” Ph.D. dissertation (Univ. of New Mexico, 2011).

C. X. Yu and T. Y. Fan, “Beam combining,” in High Power Laser Handbook, H. Injeyan and G. D. Goodno, eds (McGraw Hill, 2011), pp. 533–571.

S. M. Redmond, T. Y. Fan, D. Ripin, P. Thielen, J. Rothenberg, and G. Goodno, “Diffractive beam combining of a 2.5-kW fiber laser array,” in Lasers, Sources, and Related Photonic Devices, OSA Technical Digest (CD) (Optical Society of America, 2012), paper AM3A.1.

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