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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 7 — Apr. 4, 2005
  • pp: 2722–2730

Improving the output beam quality of multimode laser resonators

Amiel A. Ishaaya, Vardit Eckhouse, Liran Shimshi, Nir Davidson, and Asher A. Friesem  »View Author Affiliations

Optics Express, Vol. 13, Issue 7, pp. 2722-2730 (2005)

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Multimode laser operation is usually characterized by high output power, yet its beam quality is inferior to that of a laser with single TEM00 mode operation. Here we present an efficient approach for improving the beam quality of multimode laser resonators. The approach is based on splitting the intra-cavity multimode beam into an array of smaller beams, each with a high quality beam distribution, which are coherently added within the resonator. The coupling between the beams in the array and their coherent addition is achieved with planar interferometric beam combiners. Experimental verification, where the intra-cavity multimode beam in a pulsed Nd:YAG laser resonator is split into four Gaussian beams that are then coherently added, provides a total increase in brightness of one order of magnitude. Additional spectral measurements indicate that scaling to larger coherent arrays is possible.

© 2005 Optical Society of America

OCIS Codes
(140.3290) Lasers and laser optics : Laser arrays
(140.3410) Lasers and laser optics : Laser resonators

ToC Category:
Research Papers

Original Manuscript: December 1, 2004
Revised Manuscript: March 20, 2005
Published: April 4, 2005

Amiel Ishaaya, Vardit Eckhouse, Liran Shimshi, Nir Davidson, and Asher Friesem, "Improving the output beam quality of multimode laser resonators," Opt. Express 13, 2722-2730 (2005)

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  1. M. J. DiDomenico, �??A single-frequency TEM00-mode gas laser with high output power,�?? Appl. Phys. Lett. 8, 20�??22 (1966). [CrossRef]
  2. D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille and A. Barthelemy, �??Coherent combining of two Nd:YAG lasers in a Vernier-Michelson-type cavity,�?? Appl. Phys. B 75, 503�??507 (2002). [CrossRef]
  3. J. R. Leger, G. J. Swanson and W. B. Veldkamp, �??Coherent laser addition using binary phase gratings,�?? Appl. Opt. 26, 4391�??4399 (1987). [CrossRef] [PubMed]
  4. J. R. Leger, M. L. Scott and W. B. Veldkamp, �??Coherent addition of AlGaAs lasers using microlenses and diffractive coupling,�?? Appl. Phys. Lett. 52, 1771�??1773 (1988). [CrossRef]
  5. M. Tondusson, C. Froehly, V. Kermene and M. Vampouille, �??Coherent combination of four laser beams in a multi-axis Fourier cavity using a diffractive optical element,�?? J. Opt. A: Pure Appl. Opt. 3, 521�??526 (2001). [CrossRef]
  6. D. Sabourdy et. al., �??Efficient coherent combining of widely tunable fiber lasers,�?? Opt. Express 11, 87�??97 (2003), <a href= "http://www.opticsexpress.org/abstract.cfm?URI=OPEX-11-2-87">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-11-2-87</a>. [CrossRef] [PubMed]
  7. A. Shirakawa, K. Matsuo and K. Ueda, �??Power summation and bandwidth narrowing in coherently coupled fiber laser array,�?? CThGG2, Conference on Lasers and Electro-Optics (CLEO), San Francisco, California, USA (2004).
  8. A. A. Ishaaya, N. Davidson, L. Shimshi and A. A. Friesem, �??Intra-cavity coherent addition of Gaussian beam distributions using a planar interferometric coupler,�?? Appl. Phys. Lett. 85, 2187�??2189 (2004). [CrossRef]
  9. A. A. Ishaaya, L. Shimshi, N. Davidson and A. A. Friesem, �??Coherent addition of spatially incoherent light beams,�?? Opt. Express 12, 4929�??4934 (2004), <a href= "http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-20-4929">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-20-4929</a>. [CrossRef] [PubMed]
  10. A. E. Siegman, �??New developments in laser resonators,�?? Optical Resonators: Proc. SPIE 1224, 2�??14 (1990). [CrossRef]
  11. W. Koechner, Solid-state laser engineering (Springer-Verlag, 5th ed., Germany, 1999, p. 209).
  12. J. Xu, S. Li, K. K. Lee and Y. C. Chen, �??Phase locking in a two-element laser array: a test of the coupled-oscillator model,�?? Opt. Lett. 18, 513-515 (1993). [CrossRef] [PubMed]
  13. L. Fabiny, P. Colet, R. Roy and D. Lenstra, �??Coherence and phase dynamics of spatially coupled solid-state lasers,�?? Phys. Rev. A 47, 4287�??4296 (1993). [CrossRef] [PubMed]
  14. N. Hodgson and H. Weber, Optical resonators, fundamentals, advanced concepts and applications (Springer-Verlag London, Great Britain, 1997, p. 319).

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