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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 15 — May. 20, 1998
  • pp: 3290–3294

Reduction of Thermal Effects in a Diode-end-pumped, Composite Nd:YAG Rod with a Sapphire End

Masaki Tsunekane, Noboru Taguchi, and Humio Inaba  »View Author Affiliations


Applied Optics, Vol. 37, Issue 15, pp. 3290-3294 (1998)
http://dx.doi.org/10.1364/AO.37.003290


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Abstract

We present what is to our knowledge the first theoretical and experimental estimation of the thermal characteristics of a composite Nd:YAG rod with an Al<sub>2</sub>O<sub>3</sub> (sapphire) end in diode-end-pumped geometry. The peak temperature rise in the active segment is calculated to be reduced to 66% and the focal length of the thermal lens was measured to be reduced by 20% compared with a noncomposite Nd:YAG rod. By using a composite rod we successfully demonstrated the improvement of high-power performance that is due to reduction of thermally induced birefringence, which has not been observed in a composite rod with an undoped YAG end.

© 1998 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3460) Lasers and laser optics : Lasers
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.6810) Lasers and laser optics : Thermal effects

Citation
Masaki Tsunekane, Noboru Taguchi, and Humio Inaba, "Reduction of Thermal Effects in a Diode-end-pumped, Composite Nd:YAG Rod with a Sapphire End," Appl. Opt. 37, 3290-3294 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-15-3290


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References

  1. F. Hanson, “Improved laser performance at 946 and 473 nm from a composite Nd:Y3Al5O12 rod,” Appl. Phys. Lett. 66, 3549–3551 (1995).
  2. M. Tsunekane, M. Ihara, N. Taguchi, and H. Inaba, “Improvement of thermal conduction by composite structure of Nd:YAG crystals,” No. 3 of Extended Abstracts presented at the 56th Autumn Meeting of the Japan Society of Applied Physics in Kanazawa, Japan, 26–29 September 1995 (Japan Society of Applied Physics, Tokyo, 1995), paper 27a-D-3, in Japanese.
  3. M. Tsunekane, N. Taguchi, and H. Inaba, “High power operation of diode-end-pumped Nd:YVO4 laser using composite rod with undoped end,” Electron. Lett. 32, 40–41 (1996).
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  8. M. Tsunekane, N. Taguchi, and H. Inaba, “High-power, efficient, low-noise, continuous-wave all-solid-state Ti:sapphire laser,” Opt. Lett. 21, 1912–1914 (1996).
  9. W. Koechner, Solid-State Laser Engineering, 3rd ed. (Springer-Verlag, New York, 1992), Chap. 7.

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