Laser beam quality versus aperture size in a cw argon-ion laser

Johnston, Thomas F.; Sasnett, Michael W.; Doumont, J.-L.; Siegman, A. E.

doi:10.1364/ol.17.000198

Cited by 20 publications

(4 citation statements)

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“…We measured M 2 ϭ1.2 which is comparable to the lowest M 2 obtained for a cw argon ion laser in a recent study. 23 We therefore see that the high quality (TEM 00 ) mode of the Nd:YAG pump gives rise to a near diffraction limited mode of the dye beam in this type of cavity. This is one of the main benefits of the use of the longitudinally pumped gain region as opposed to the original transversely pumped design.…”

Section: Spatial Profilementioning

confidence: 72%

Pulsed single-mode dye laser for coherent control experiments

Corless

West

Bromage

et al. 1997

Review of Scientific Instruments

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We describe a pulsed single-mode dye laser whose output characteristics satisfy the stringent requirements of coherent control experiments. This simple, low cost laser exhibits 1.6ϫ transform-limited frequency performance with a single-shot linewidth of 58 MHz, and a time averaged linewidth of 240 MHz. The spatial mode is nearly Gaussian and has a beam quality parameter M 2 ϭ1.2. We modified the pulse shape using saturable absorption in the dye amplifier. The resultant pulses are temporally smooth and have a duration of approximately 20 ns.

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Section: Spatial Profilementioning

confidence: 72%

Pulsed single-mode dye laser for coherent control experiments

Corless

West

Bromage

et al. 1997

Review of Scientific Instruments

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“…Making the substitution (72) and neglecting the second-order derivatives of r with respect to the longitudinal coordinate z, as well as the derivatives of the function no(z), one can reduce Eq. (71) …”

Section: Monochromatic Beamsmentioning

confidence: 99%

“…Therefore, the generalized beam quality factors considered in many recent optical publications [27][28][29][30][31][32][33][34][35][36], or "global degree of coherence" (in fact, det Q) [34] are synonyms (or special eases) for the universal optical invarimlts introduced in [16]. Different experiments devoted to measuring the beam quality factor were described, e.g., in [72][73][74][75][76].…”

Section: Beam Quality Factorsmentioning

confidence: 99%

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Universal invariants in quantum mechanics and physics of optical and particle beams

Dodonov

Манько

2000

J Russ Laser Res

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We give a brief review of the theory of quantum universal invaxiants and their counterparts in the physics of light and particle beams. The invariants concerned are certain combinations of the second-and higher-order moments (variances) of quantum-mechanical operators, or the transverse phase-space coordinates of the paraxial beams of light or particles. They are conserved in time (or along the beam axis) independently of the concrete fbrm of the coefficients of the SchrSdinger-like equations governing the evolution of the systems, provided that the effective Hamiltonian is either a generic quadratic form of the generalized coordinatemomenta operators or a linear combination of generators of some finite-dimensional algebra (in particular, any semisimple Lie algebra). Using the phase space representation of quantum mechanics (paraxial optics) in terms of the Wigner function, we elucidate the relation of the quantmn (optical) invariants to the classical universal integral invaxiants of Poincax@ and Cartan. The specific features of Gaussian beams are discussed as examples. The concept of the universal quantum integrals of motion is introduced, and examples of the "universal invaxiant solutions" to the Schrbdinger equation, i.e., self-consistent eigenstates of the universal integrals of motion, axe given.

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