Observation of enhanced thermal lensing due to near-Gaussian pump energy deposition in a laser-diode side-pumped Nd:YAG laser

Welford, D.; Rines, David M.; Dinerman, B. J.; Martinsen, R.

doi:10.1109/3.135230

Cited by 17 publications

(5 citation statements)

References 14 publications

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“…Space distribution of refractive index of inside of laser rod can be expressed as n(r)=n(o)+An(r) +An(r)g (20) Where n(r) is changing value of refractive index in the radial direction, n(O) is refractive index of center of laser rod, z\n(r)T is refractive index changes that is caused by nonuniform temperature distribution, An(r)6 is refractive index changes that is caused by photoelastic of thermal strain. All of variation can be written as Where unit of Q is W/cm2 it is can be shown by (2), unit of r is cm.…”

Section: -V)mentioning

confidence: 99%

Temperature characteristics of Nd:YAG bar pumped by high-repetition-rate LD

et al. 2002

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Radial and longitudinal distribution characteristics of temperature of Nd:YAG laser rod pumped by semiconductor laser line-array are analyzed in this paper. Thermal effect of laser rod, the relation between thermal stress birefringence of laser rod and light pumping power, and the relation between thermolens focal length and pumping power density and repetition frequency oflight pumping are studied.

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Section: -V)mentioning

confidence: 99%

Temperature characteristics of Nd:YAG bar pumped by high-repetition-rate LD

et al. 2002

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“…The cylindrical part is fine grounded to eliminate possible parasitics emission modes and the rear plane face is R max coated at the pump wavelength (808 nm) to assure a double pass for the diode pumping beam [5]. The main advantages of this geometry are the simplicity of the diode positioning and the rather good gain distribution.…”

Section: Experimental Set-upmentioning

confidence: 99%

Single mode injection seeded Nd:YAG oscillator with an adjustable pulse length between 20 and 50 ns

Cabaret

Drag

2006

Eur. Phys. J. Appl. Phys.

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Abstract. Highly stable single axial mode operation is obtained in a pulsed injection seeded oscillator with an adjustable pulse length from 20 ns to more than 50 ns, at a constant output energy. The adjustment principle is described experimentally and analysed theoretically. The peak to peak time jitter added to a slow time drift is of the order of 1 nanosecond for a 20 nanoseconds pulse length. PACS

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“…Thermal lensing in active elements (AE) [1][2][3][4] is one of the main issues which limits the average power of solid state laser systems [5]. One of the main causes for the occurrence of thermal aberrations and the enhancement of thermal lensing is nonuniform radial pump distribution [1][2][3][4][5][6]. However, the temper ature dependence of the thermal, mechanical and optical parameters of AE is also a very important factor influencing the values of optical power and thermal aberrations [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Modeling of thermal lensing in a [1 1 1]-cut Nd:YAG rod with temperature-dependent parameters and different pumping profiles

Brickus¹,

Dement'ev²

2017

Laser Phys.

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Temperature dependences of the thermo-optical coefficients of YAG crystals are often neglected when thermal lensing in laser rods is investigated, though their influence is very significant. It is especially significant for transversally non-uniform thermal loading. An analytical solution of the heat transfer equation with only the radial heat flow is found in the integral form, which is very convenient for numerical simulations. Uniform, top-hat, parabolic, Gaussian, super-Gaussian and annular heat source distributions are used in the calculations. The generalization of the thermally-induced refractive index change for long enough [1 1 1]-cut YAG rods to the case of temperature-dependent YAG parameters is developed and applied to the calculation of the corresponding optical path differences. Different definitions of the optical power of the aberrated thermal lens (TL) are discussed in detail. It is shown that for each of the heat source distributions, the temperature dependences of the YAG parameters significantly increase (1.5-1.8 times) the paraxial optical power of the induced TL.

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Observation of enhanced thermal lensing due to near-Gaussian pump energy deposition in a laser-diode side-pumped Nd:YAG laser

Cited by 17 publications

References 14 publications

Temperature characteristics of Nd:YAG bar pumped by high-repetition-rate LD

Temperature characteristics of Nd:YAG bar pumped by high-repetition-rate LD

Single mode injection seeded Nd:YAG oscillator with an adjustable pulse length between 20 and 50 ns

Modeling of thermal lensing in a [1 1 1]-cut Nd:YAG rod with temperature-dependent parameters and different pumping profiles

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