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Applied Optics

Applied Optics


  • Vol. 39, Iss. 18 — Jun. 20, 2000
  • pp: 3093–3098

Thermally boosted pumping of neodymium lasers

Raphael Lavi and Steven Jackel  »View Author Affiliations

Applied Optics, Vol. 39, Issue 18, pp. 3093-3098 (2000)

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Pumping at 885 nm from thermally excited ground-state levels directly to the Nd:YAG upper lasing level is experimentally demonstrated by use of a Ti:sapphire pump laser. This approach utilizes thermal energy contained within the laser medium to provide part of the pump energy required to achieve population inversion. Slope efficiency increased by 12% compared with traditional pump band excitation (λpump = 808 nm) and by 7% compared with ground-state direct pumping (λpump = 869 nm). The combined transition from the first and second thermally excited Stark components of the ground state (4I9/2) to the upper lasing level (4F3/2) has characteristics that make thermally boosted pumping a suitable candidate for use with diode lasers: reasonable absorption (1.8 cm-1) and bandwidth (2.7 nm FWHM). A model suggests that, compared with traditional 808-nm pumping, heat could be reduced by 40% by use of thermally boosted pumping.

© 2000 Optical Society of America

OCIS Codes
(140.3380) Lasers and laser optics : Laser materials
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3530) Lasers and laser optics : Lasers, neodymium
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.6810) Lasers and laser optics : Thermal effects

Original Manuscript: September 15, 1999
Revised Manuscript: March 14, 2000
Published: June 20, 2000

Raphael Lavi and Steven Jackel, "Thermally boosted pumping of neodymium lasers," Appl. Opt. 39, 3093-3098 (2000)

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