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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 9 — Apr. 26, 2010
  • pp: 9634–9642

Array size scalability of passively coherently phased fiber laser arrays

Wei-zung Chang, Tsai-wei Wu, Herbert G. Winful, and Almantas Galvanauskas  »View Author Affiliations

Optics Express, Vol. 18, Issue 9, pp. 9634-9642 (2010)

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We explore, by means of experiments and simulation, the power combining efficiency and power fluctuation of coherently phased 2, 4, 6, 8, 10, 12, 14, 16-channel fiber-laser arrays using fused 50:50 single-mode couplers. The measured evolution of power combining efficiency with array size agrees with simulations based on a new propagation model. For our particular system the power fluctuations due to small wavelength-scale length variations are seen to scale with array size as N 3 . Beat spectra support the notion that a lack of coherently-combined supermodes in arrays of increasing size leads to a decrease in combined-power efficiency.

© 2010 OSA

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3298) Lasers and laser optics : Laser beam combining

ToC Category:
Lasers and Laser Optics

Original Manuscript: February 25, 2010
Revised Manuscript: April 14, 2010
Manuscript Accepted: April 16, 2010
Published: April 23, 2010

Wei-zung Chang, Tsai-wei Wu, Herbert G. Winful, and Almantas Galvanauskas, "Array size scalability of passively coherently phased fiber laser arrays," Opt. Express 18, 9634-9642 (2010)

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