Optical synthesis of a high-energy uniform and uniphase laser emission

Saviot, F.; Mottay, Eric; Vampouille, M.; Colombeau, B.

doi:10.1364/ol.18.002117

Cited by 9 publications

(1 citation statement)

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“…This resonator is referred to as a self-imaging, 1/2-degenerate system 1 and is capable of supporting a more-or-less arbitrary transverse beam pattern even if it significantly deviates from the standard Gaussian profile. This property has been applied for optically synthesizing various laser waveforms [2][3][4][5] and for optimizing the extraction efficiency of solid-state lasers. 6,7 By ray analysis of the resonators, however, a paraxial resonance equation 8 yields the mirror separations of a two-mirror cavity in which any arbitrary rays repeat themselves after an integer number (say N) of return transits.…”

Section: Introductionmentioning

confidence: 99%

Observations of multipass transverse modes in an axially pumped solid-state laser with different fractionally degenerate resonator configurations

Hsieh

2001

J. Opt. Soc. Am. B

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We experimentally show, for the first time to our knowledge, that a diode-pumped Nd:YVO 4 laser can operate with multipass transverse (MPT) modes that self-reproduce after several round trips in a plano-concave cavity that has fractionally degenerate resonator configurations when the pump beam waist is sufficiently smaller than that of the fundamental cavity mode. The MPT mode is found to exhibit multiple beam waists located at different positions and to experience a lower pumping threshold than the single-pass transverse mode. With off-axis pumping, the N-pass transverse mode forms a symmetric pattern for even N and an asymmetric pattern for odd N. This result can be explained as being due to the introduction of MPT modes but not to superposition of the standard cavity modes.

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