Cryogenic Yb:YAG picosecond laser with high average power visible and ultraviolet harmonic generation

Brown, David C.; Kowalewski, K.; Envid, Victoria; Zembek, J.; Canale, B.; Kolis, Joseph W.; McMillen, Colin D.; Geisber, H.

doi:10.1117/12.921425

Cited by 2 publications

(1 citation statement)

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“…Cryogenically cooled Yb lasers have received much attention in recent years due to their demonstrated ability to provide near diffraction-limited output beams with high efficiency [1][2][3][4], CW powers at the kilowatt level [5], near-kilowatt picosecond ultrafast power [5], high Q-switched average power [6], and record frequency-doubled picosecond average power [7,8]. The many attributes and state-of-the-art of cryogenic lasers have been described in three review articles [9][10][11].…”

Section: Introductionmentioning

confidence: 98%

Ho:YAG absorption cross sections from 1700 to 2200 nm at 83, 175, and 295 K

Brown¹,

Envid²,

Zembek³

2012

Appl. Opt.

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We have obtained absorption spectroscopic cross sections as a function of wavelength for the laser material Ho:YAG at 295, 175, and 83 K, in the spectral range from 1700 to 2200 nm. The absorption range corresponds to (5)I8-(5)I7 transitions from the ground state to the first excited state amenable to direct pumping by laser diodes and Tm fiber lasers. The data allow a direct comparison of the absorption cross-section intensities and linewidths as temperature is lowered from room temperature to cryogenic temperatures. Universal absorption curves and numerical tables are presented for pump sources that are assumed to have a gaussian spectral lineshape, as a function of center wavelength, bandwidth, and optical density (doping density×penetration depth), at 295 and 83 K. Curves and tables are presented for both 295 and 83 K and may be used to optimize the pump absorption and laser efficiency.

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Section: Introductionmentioning

confidence: 98%

Ho:YAG absorption cross sections from 1700 to 2200 nm at 83, 175, and 295 K

Brown¹,

Envid²,

Zembek³

2012

Appl. Opt.

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Cryogenic nanosecond and picosecond high average and peak power (HAPP) pump lasers for ultrafast applications

Brown¹,

Tornegård²,

Kolis

2016

High Pow Laser Sci Eng

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Using cryogenic laser technology, it is now possible to design and demonstrate lasers that have concomitant high average and peak powers, with near-diffraction-limited beam quality. We refer to these new laser systems as HAPP lasers. In this paper, we review important laser crystal materials properties at cryogenic temperature, with an emphasis on Yb lasers, and discuss the important design considerations, including the laser-induced damage threshold, nonlinear effects and thermal effects. A comprehensive model is presented to describe diode pulsed pumping with arbitrary duration and repetition rate, and is used with the Frantz-Nodvik equation to describe, to first order, the performance of HAPP laser systems. A computer code with representative results is also described.

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Cryogenic Yb:YAG picosecond laser with high average power visible and ultraviolet harmonic generation

Cited by 2 publications

References 0 publications

Ho:YAG absorption cross sections from 1700 to 2200 nm at 83, 175, and 295 K

Ho:YAG absorption cross sections from 1700 to 2200 nm at 83, 175, and 295 K

Cryogenic nanosecond and picosecond high average and peak power (HAPP) pump lasers for ultrafast applications

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