Single-frequency Ince-Gaussian mode operations of laser-diode-pumped microchip solid-state lasers

Ohtomo, Takayuki; Kamikariya, Koji; Otsuka, Kenju; Chu, Shu Chun

doi:10.1364/oe.15.010705

Cited by 42 publications

(21 citation statements)

References 6 publications

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“…More recently, Ince-Gaussian (IG) solutions to the paraxial wave equation [9] have attracted considerable attention. IG modes have been observed [10,11] and also numerically studied [12] in stable resonators. However, the conditions needed to generate high-order LG or IG modes in endpumped lasers are not fully understood.…”

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confidence: 92%

Role of cavity degeneracy for high-order mode excitation in end-pumped solid-state lasers

2014

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The possibility of exciting laser modes such as Laguerre-Gaussian (LG) or Ince-Gaussian (IG) modes is discussed on the basis of a gain-matching integral. We reach the conclusion that, using tight pumping and away from degeneracy regions, only the IG(n,n)(e) modes can be excited. Furthermore, pure high-order modes with circular or elliptical nodal lines can never be excited. Only an approximation of such modes, which we call quasi-IG or quasi-LG modes, can be observed and only when the cavity is partially degenerate. We provide experimental results in perfect agreement with the theory and discuss the exact nature of the profiles observed at degeneracy in our experiments and elsewhere in the literature.

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confidence: 92%

Role of cavity degeneracy for high-order mode excitation in end-pumped solid-state lasers

2014

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“…[48][49][50][51][52][53][54][55][56] A number of publications appeared also on generation of the so-called cylindrical vector (cv) modes, which correspond to solutions of the wave equation in the vector form in cylindrical coordinates. Due to the large number of potential applications, there has been an increasing interest in studying methods of generation of different laser modes having circularly symmetric geometry, namely cylindrical scalar or vector LG and BG modes.…”

Section: Introductionmentioning

confidence: 99%

Laguerre-Gaussian modes selection in diode-pumped solid-state lasers

Senatsky

Bisson

et al. 2012

OPT REV

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Over the last twenty years, diode pumping of solid-state lasers has opened new prospects for the mode control and formation of Laguerre-Gaussian (LG) beams, enabling a large variety of applications. Experiments on scalar and vector LG modes selection in Nd 3þ -and Yb 3þ -doped ceramics and crystal lasers carried out at the Institute for Laser Science, Tokyo are reviewed. Selection of LG modes from low to high orders using intra-cavity elements, polarization-selective mirrors, or shaping the pump beam profile, is considered. Illustrations of record-high-order LG hollow modes, multiring modes with highly directional propagation properties, characteristics of cw and pulsed lasers with radially or azimuthally polarized beams of high polarization purity are presented. General solutions of the wave equation for the axi-symmetric electric field, which describe LG beams of various profiles, are proposed for data analysis. In parallel, a short review on LG modes selection studies carried out at other laboratories is given.

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“…The method will be beneficial to further study of the properties and potential applications of IGMs. It can also be applied to other single modes, and the quantity will be better if it is combined with other methods [6,8].…”

Section: Resultsmentioning

confidence: 99%

“…All of these modes are the natural resonating modes in stable laser resonators [2]; in addition, IGMs constitute the continuous transition modes between LGMs and HGMs [1][2][3]. The way to excite IGMs has been extensively explored [6][7][8]. One effective way is breaking the symmetry of cavity.…”

Section: Introductionmentioning

confidence: 99%

“…One effective way is breaking the symmetry of cavity. For example, Takayuki et al [6] confirmed that IGMs could been excited by tilting the microchip cavity at different pump energy, and Schwarz et al [7] have observed IGMs in stable resonators by introducing a cross hair inside the cavity. Another way is pumping the brightest elliptic spot of a IGM in a stable plano-concave cavity, as Shu-Chun Chu et al [8] showed.…”

Section: Introductionmentioning

confidence: 99%

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A method for selective excitation of Ince-Gaussian modes in an end-pumped solid-state laser

Lei

Wang

et al. 2014

Appl. Phys. B

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A method for selective excitation of InceGaussian modes is presented. The method is based on the spatial distributions of Ince-Gaussian modes as well as the transverse mode selection theory. Significant diffraction loss is introduced in a resonator by using opaque lines at zerointensity positions, and this loss allows to excite a specific mode; we call this method ''loss control.'' We study the method by means of numerical simulation of a half-symmetric laser resonator. The simulated field is represented by angular spectrum of the plane waves representation, and its changes are calculated by the two-dimensional fast Fourier transform algorithm when it passes through the optical elements and propagates back and forth in the resonator. The output lasing modes of our method have an overlap of over 90 % with the target Ince-Gaussian modes. The method will be beneficial to the further study of properties and potential applications of Ince-Gaussian modes.

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Single-frequency Ince-Gaussian mode operations of laser-diode-pumped microchip solid-state lasers

Cited by 42 publications

References 6 publications

Role of cavity degeneracy for high-order mode excitation in end-pumped solid-state lasers

Role of cavity degeneracy for high-order mode excitation in end-pumped solid-state lasers

Laguerre-Gaussian modes selection in diode-pumped solid-state lasers

A method for selective excitation of Ince-Gaussian modes in an end-pumped solid-state laser

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