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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 25 — Dec. 6, 2010
  • pp: 25873–25886

Dynamical, bidirectional model for coherent beam combining in passive fiber laser arrays

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


Optics Express, Vol. 18, Issue 25, pp. 25873-25886 (2010)
http://dx.doi.org/10.1364/OE.18.025873


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Abstract

We generalize the recently proposed model for coherent beam combining in passive fiber laser arrays [Opt. Express 17, 19509 (2009)] to include the transient gain dynamics and the complication of counterpropagating waves, two important features characterizing actual experimental conditions. The extended model reveals that beam combining is not affected by the population relaxation process or the presence of backward propagating waves, which only serve to co-saturate the gain. The presence of nonresonant nonlinearity is found to reduce the coherent combining efficiency at high power levels. We show that the array lases at the frequencies with minimum overall losses when multiple loss mechanisms are present.

© 2010 OSA

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(140.3290) Lasers and laser optics : Laser arrays
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3298) Lasers and laser optics : Laser beam combining

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: September 29, 2010
Revised Manuscript: November 8, 2010
Manuscript Accepted: November 11, 2010
Published: November 25, 2010

Citation
Tsai-wei Wu, Wei-zung Chang, Almantas Galvanauskas, and Herbert G. Winful, "Dynamical, bidirectional model for coherent beam combining in passive fiber laser arrays," Opt. Express 18, 25873-25886 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-25-25873


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References

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