High Power, Multi-Segmented Nd:YAG Laser, Longitudinally Pumped at 885 nm

Hahn, Sven; Frede, M.; Neumann, Jörg; Kracht, Dietmar

doi:10.1364/cleo.2009.cthr3

Cited by 5 publications

(1 citation statement)

References 7 publications

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“…One approach to decrease the maximum temperature in the crystal, that has already been used for Nd 3+ -doped laser crystals and has shown to increase the output power of the laser, is to use a segmented crystal consisting of multiple homogeneously doped segments with increasing doping concentration. [5][6][7] Here, we present investigations on homogeneously doped and segmented crystals regarding the maximal achievable output power with a good beam quality.…”

Section: Introductionmentioning

confidence: 99%

Power scaling of segmented and homogeneously doped Ho^{3+}:YAG laser resonators

Goth,

Rupp,

Griesbeck

et al. 2023

Technologies for Optical Countermeasures XIX

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We report on laser resonators with a segmented and a homogeneously doped Ho3+:YAG crystal delivering over 60 W of output power with near-diffraction-limited beam quality. The resonators with both crystals exhibit high slope efficiencies around 67% and maximum pulse energies of 1.14 mJ and 1.04 mJ are measured for the homogeneously doped and segmented crystal, respectively, at a repetition rate of 50 kHz. Q-switched pulses with a pulse peak power of 108 kW are generated with the homogeneous crystal at a repetition rate of 25 kHz. In a slight redesign of the cavity, 1:24 mJ, 33 ns pulses with a pulse peak power of 38kW are measured.

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Section: Introductionmentioning

confidence: 99%

Power scaling of segmented and homogeneously doped Ho^{3+}:YAG laser resonators

Goth,

Rupp,

Griesbeck

et al. 2023

Technologies for Optical Countermeasures XIX

View full text Add to dashboard Cite

show abstract

Limitations of homogeneous and segmented single-crystal compact TEM00-mode Ho3+:YAG laser resonators

et al. 2023

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We present investigations on output power limitations of near-diffraction-limited compact $$\hbox {Ho}^{3+}$$ Ho 3 + :YAG laser resonators employing a homogeneous or segmented laser crystal. An approach for designing a segmented crystal is presented. Maximum output powers of $${57.6}\,\hbox {W}$$ 57.6 W and $${51.9}\,\hbox {W}$$ 51.9 W are reached with the homogeneous and segmented crystal, respectively, resulting in pulse energies of $${1.14}\,\hbox {mJ}$$ 1.14 mJ and $${1.04}\,\hbox {mJ}$$ 1.04 mJ at a repetition rate of $${50}\,\hbox {kHz}$$ 50 kHz in Q-switched operation. Interferometric experiments are conducted to derive the radial temperature profile for both crystals. Simulations based on a split-step beam propagation method are used to model the longitudinal temperature gradient in both crystals.

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