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Optics Letters

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  • Vol. 23, Iss. 4 — Feb. 15, 1998
  • pp: 271–273

Femtosecond diode-pumped Nd:glass laser with more than 1 W of average output power

J. Aus der Au, F. H. Loesel, F. Morier-Genoud, M. Moser, and U. Keller  »View Author Affiliations


Optics Letters, Vol. 23, Issue 4, pp. 271-273 (1998)
http://dx.doi.org/10.1364/OL.23.000271


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Abstract

We have demonstrated 175-fs pulses with 1 W and 300-fs pulses with 1.2 W of average output power at a pulse repetition rate of 117 MHz from a Nd:phosphate (Schott LG 760) glass laser pumped by a 1-cm-wide, 20-W diode laser bar. Stable soliton mode locking was achieved by use of an intracavity semiconductor saturable absorber mirror. We obtained more than 2 W of average power without mode locking. Using cylindrical cavity mirrors, we adapted the laser mode inside the Nd:glass to the highly elliptical pump beam in both dimensions (tangential and sagittal axes) while maintaining a nearly ideal circular TEM00 output beam with M2≈1.2 . Overpumping the laser mode in the tangential plane and efficient unidirectional heat removal in the sagittal plane using a 0.8-mm thin Nd:glass also contributed to the good output-beam quality.

© 1998 Optical Society of America

OCIS Codes
(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
(140.4050) Lasers and laser optics : Mode-locked lasers

Citation
J. Aus der Au, F. H. Loesel, F. Morier-Genoud, M. Moser, and U. Keller, "Femtosecond diode-pumped Nd:glass laser with more than 1 W of average output power," Opt. Lett. 23, 271-273 (1998)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-23-4-271


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