Innovative high-power CW Yb:YAG cryogenic laser

Brown, David C.; Singley, Joseph M.; Yager, E.; Kuper, J. W.; Lotito, B. J.; Bennett, Linsey

doi:10.1117/12.718312

Cited by 12 publications

(5 citation statements)

References 9 publications

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“…We begin by first looking at the evolution of Yb:YAG, Yb:YLF, and Yb:CaF 2 CW cryogenic lasers; Yb:YAG and Yb:YLF materials have been used for the highest power CW demonstrations to date. Figure 44 shows the CW output power obtained from Yb:YAG cryogenically-cooled lasers operating near 80 K. The corresponding data and references are shown in Table 7 [1,3,4,30,108,109,[126][127][128][129][130][131][132][133][134][135][136][137][138][139]. The first CW Yb:YAG demonstration was by Lacovara [1], who reported 40 W output power.…”

Section: Cryogenic Cw Lasersmentioning

confidence: 99%

“…The earliest demonstration of CW power in excess of 100 W is attributed to [109], whom reported a cryogenic Yb:YLF laser with output power of 110 W. This was followed by two early high power CW Yb:YAG cryogenic laser demonstrations at 165 W [126] and 300 W [127] by the MIT cryogenic laser group. CW cryogenic Yb:YAG lasers with CW output power ě400 W have been reported by a number of groups, including 455 W [3], 400 W [129], 550 W [130], 500 W [135], and 494 W [138]. The largest CW power for a Yb:YAG cryogenic laser reported to date, 963 W, was for a Yb:YAG cryogenic oscillator driven double-passed Yb:YAG preamplifier followed by a Yb:YAG power amplifier demonstrated by our group [132].…”

Section: Cryogenic Cw Lasersmentioning

confidence: 99%

“…We note that almost all of the CW laser sources included in Figure 44 had near-diffraction-limited beam-quality with M 2 values typically <1.3. The one exception is [129], which reported multi-transverse-mode operation. Other cryogenic CW lasers have been developed recently as well.…”

Section: Cryogenic Cw Lasersmentioning

confidence: 99%

See 2 more Smart Citations

The Application of Cryogenic Laser Physics to the Development of High Average Power Ultra-Short Pulse Lasers

Brown¹,

Tornegård²,

Kolis

et al. 2016

Applied Sciences

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Ultrafast laser physics continues to advance at a rapid pace, driven primarily by the development of more powerful and sophisticated diode-pumping sources, the development of new laser materials, and new laser and amplification approaches such as optical parametric chirped-pulse amplification. The rapid development of high average power cryogenic laser sources seems likely to play a crucial role in realizing the long-sought goal of powerful ultrafast sources that offer concomitant high peak and average powers. In this paper, we review the optical, thermal, thermo-optic and laser parameters important to cryogenic laser technology, recently achieved laser and laser materials progress, the progression of cryogenic laser technology, discuss the importance of cryogenic laser technology in ultrafast laser science, and what advances are likely to be achieved in the near-future.

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Section: Cryogenic Cw Lasersmentioning

confidence: 99%

Section: Cryogenic Cw Lasersmentioning

confidence: 99%

See 1 more Smart Citation

The Application of Cryogenic Laser Physics to the Development of High Average Power Ultra-Short Pulse Lasers

Brown¹,

Tornegård²,

Kolis

et al. 2016

Applied Sciences

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show abstract

“…For this reason as well as thermal ones several varieties of Yb:YAG lasers have been investigated for cryogenic operation [1][2][3][4][5][6][7][8][9][10][11]. 85% slope efficiency has been achieved [1] and later on the same laser configuration produced 300W with an optical-to-optical In the pump on the edge 1).…”

Section: Introductionmentioning

confidence: 98%

Yb:YAG thin-disk laser performance at room and cryogenic temperatures

et al. 2012

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Cryogenic solid-state laser materials offer many improvements in thermal, optical, structural, and lasing properties over their room temperature counterparts. As the temperature of Yb:YAG decreases from room to 80K it transitions from quasi-three-level lasing to a 4-level laser. In this study, we compare Yb:YAG thin-disk laser performance at room 293K and 80K. To achieve this direct comparison we have built two cooling systems based on R134A refrigerant and also on liquid nitrogen (LN 2 ). We have made an analytical calculation of the small signal laser gain that takes into account the spurious amplified spontaneous emission and photon re-absorption. The cold thin-disk laser clearly outperforms room temperature operation, and the theoretical results shows room temperature gain flattening.

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“…And a number of Yb:YAG lasers have been investigated for cryogenic operation [1][2][3][4][5][6][7][8][9][10][11]. 85% slope efficiency has been achieved [1] and later on the same laser configuration produced 300W with an optical-to-optical efficiency of 60% [2].…”

Section: Introductionmentioning

confidence: 98%

Cryogenic Yb:YAG thin-disk laser

et al. 2011

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At cryogenic temperatures, Yb:YAG behaves as a 4-level laser. Its absorption and emission cross-sections increase, and its thermal conductivity improves. Yb:YAG thin disk laser performance at room and cryogenic (80°K) temperatures will be presented. The Yb:YAG gain media is cooled using either a pressurized R134A refrigerant system or by a two-phase liquid nitrogen spray boiler. Interchangeable mounting caps allow the same Yb:YAG media to be switched between the two systems. This allows direct comparison of lasing, amplified spontaneous emission, and temperature performance between 20°C and -200°C.

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Innovative high-power CW Yb:YAG cryogenic laser

Cited by 12 publications

References 9 publications

The Application of Cryogenic Laser Physics to the Development of High Average Power Ultra-Short Pulse Lasers

The Application of Cryogenic Laser Physics to the Development of High Average Power Ultra-Short Pulse Lasers

Yb:YAG thin-disk laser performance at room and cryogenic temperatures

Cryogenic Yb:YAG thin-disk laser

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