High power scalable Nd:YAG laser architecture

Injeyan, Hagop; Goodno, Gregory D.; Komine, H.; McNaught, S. J.; Redmond, Shawn M.; Long, W. H.; Simpson, R.; Cheung, E.; Howland, Donna; Epp, P.; McGraw, P.; Weber, M.; McClellan, M.; Bell, DC; Serrano, Jesús María Mirapeix; Sollee, J.; Landers, Frank; DaSilva, H.; Grumman, Northrop

doi:10.1109/cleo.2005.201712

Cited by 14 publications

(14 citation statements)

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Section: Introductionmentioning

confidence: 99%

“…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%

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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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Section: Introductionmentioning

confidence: 99%

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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“…At present, the operation regime of high power fiber lasers combining nano-or picosecond pulse widths and a multi-kilohertz repetition rate is a key for many industrial applications [1,2], especially for laser material processing such as micromachining, precision marking, and cutting. Many of these processes require high peak power and a diffraction-limited beam quality.…”

Section: Introductionmentioning

confidence: 99%

Yb³⁺-doped rod-type amplifiers with local adiabatic tapers for peak power scaling and beam quality improvement

et al. 2017

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The use of short local tapers in large mode area fiber amplifiers is proposed for peak power scaling while maintaining good beam quality. To avoid modal distortions, the powder-sintering (REPUSIL) method was employed to obtain core materials with excellent refractive index homogeneity. First experiments with Yb 3+ -doped rod-type amplifiers delivered 2 ns pulses with peak powers of 540 kW and energies of 1.4 mJ for the untapered rod and 230 kW for the tapered rod (limited by facet damage). The beam quality improved from an M 2 value of approximately 10 to 3.5. The investigation of the taper structure indicates room for further improvement.

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“…Recent technological advances have made possible fiber lasers with output power levels up to 10 kW. [1] However, the highest output powers are achieved with broadband output spectra, which make them unsuitable for a range of applications such as frequency conversion, lidar, and gravitational wave detection, [2] especially for beam combining process (coherent and spectral) [3−6] with directed energy purposes, high power narrow-band fiber lasers or amplifiers with typical linewidth less than 20 GHz are widely researched as ideal sources. However, the output powers of these narrow-band fiber systems are limited to kW-level.…”

mentioning

confidence: 99%

Raman Suppression in a Kilowatt Narrow-Band Fiber Amplifier

Yang

Zheng

et al. 2016

Chinese Phys. Lett.

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A novel technique to suppress stimulated Raman scattering in a high power narrow-band fiber amplifier is reported. By seeding with a combination of a broadband amplified spontaneous emission seed and a narrowband master oscillator seed, the Raman Stokes components can be reduced about 16 dB at a total output power of 1 kW. Raman suppression results are depicted in a different wavelengths seeding case and the same wavelength seeding case, respectively, with different seed power ratios.

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High power scalable Nd:YAG laser architecture

Cited by 14 publications

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

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

Yb³⁺-doped rod-type amplifiers with local adiabatic tapers for peak power scaling and beam quality improvement

Raman Suppression in a Kilowatt Narrow-Band Fiber Amplifier

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High power scalable Nd:YAG laser architecture

Cited by 14 publications

References 0 publications

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

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

Yb3+-doped rod-type amplifiers with local adiabatic tapers for peak power scaling and beam quality improvement

Raman Suppression in a Kilowatt Narrow-Band Fiber Amplifier

Contact Info

Product

Resources

About

Yb³⁺-doped rod-type amplifiers with local adiabatic tapers for peak power scaling and beam quality improvement