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Generation of Super-Gaussian modes in Nd:YAG lasers with a graded-phase mirror

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2 Author(s)
Gerber, M. ; Inst. of Appl. Phys., Univ. of Bern, Switzerland ; Graf, T.

A dielectric graded-phase mirror was developed to change the intensity distribution of the fundamental mode in an Nd:YAG laser resonator to a top-hat profile. A super-Gaussian mode of the sixth order was generated by means of a graded-phase mirror with a simple ring-shaped phase step on a spherical reflector. The depth of the ring on the mirror was 90 nm. The graded-phase mirror was manufactured with an ordinary vapor deposition technique using an appropriate mask. Laser experiments with CW and repetitively pulsed diode-laser pumping were performed and compared. Slope efficiencies up to 19% were achieved. The experimental results are in excellent agreement with the theory.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:40 ,  Issue: 6 )

Date of Publication:

June 2004

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