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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 15 — Jul. 28, 2014
  • pp: 17804–17809

High beam quality in two directions and high efficiency output of a diode laser array by spectral-beam-combining

Zhanda Zhu, Long Gou, Menghua Jiang, Yongling Hui, Hong Lei, and Qiang Li  »View Author Affiliations

Optics Express, Vol. 22, Issue 15, pp. 17804-17809 (2014)

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Improvement is made in the traditional spectral beam combining structure by adding beam shaping element, namely Beam Transformation System (BTS). Spectral beam combination is performed in a horizontal direction by the external cavity after beam shaping. The effect of smile and the divergence of the slow axis are reduced. A standard semiconductor laser array is used in this experiment. A CW output power of 58.8 W and an electro-optic conversion efficiency of 51% are achieved. The spectral line-width is 12.7 nm. M2 of 1.3 × 11.6 in horizontal and vertical directions are obtained. The beam quality of the output is close to that of a single emitter of the array in two directions.

© 2014 Optical Society of America

OCIS Codes
(140.2010) Lasers and laser optics : Diode laser arrays
(140.3290) Lasers and laser optics : Laser arrays
(140.3300) Lasers and laser optics : Laser beam shaping
(140.3410) Lasers and laser optics : Laser resonators
(140.3298) Lasers and laser optics : Laser beam combining

ToC Category:
Lasers and Laser Optics

Original Manuscript: May 7, 2014
Revised Manuscript: June 30, 2014
Manuscript Accepted: July 4, 2014
Published: July 15, 2014

Zhanda Zhu, Long Gou, Menghua Jiang, Yongling Hui, Hong Lei, and Qiang Li, "High beam quality in two directions and high efficiency output of a diode laser array by spectral-beam-combining," Opt. Express 22, 17804-17809 (2014)

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