2.3-kW continuous operation cryogenic Yb:YAG laser

Brasseur, J.K.; Abeeluck, A. K.; Awtry, Andrew R.; Meng, L.S.; Shortoff, Kevin E.; Miller, Nicholas J.; Hampton, Richard K.; Cuchiara, Michael H.; Neumann, D.K.

doi:10.1117/12.795269

Cited by 13 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…we show the thermal conductivity of Yb:YAG as a function of temperature from 100 to 300 K. The data are presented for Yb dopings of 0, 2, 4, 10, 15, and 25 at-%. [9] while the curves for 10 and 25 at-% Yb are extrapolated from the data of [9].…”

Section: Yb:yag Thermal and Thermo-optic Properties At Reduced Tempermentioning

confidence: 99%

“…References [7] and [8] provide good summaries of recent work, however, we mention some recent papers that are relevant to the results presented here. In [9] the authors describe a 2.3 kW cryogenic Yb:YAG oscillator-amplifier system whose output is quasi-CW. Here we describe a Yb:YAG cryogenic oscillator-amplifier system with sustained cw or ultrafast average power output.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High sustained average power cw and ultrafast Yb:YAG near-diffraction-limited cryogenic solid-state laser

Brown¹,

Singley²,

Kowalewski³

et al. 2010

Opt. Express

View full text Add to dashboard Cite

We report what we believe to be record performance for a high average power Yb:YAG cryogenic laser system with sustained output power. In a CW oscillator-single-pass amplifier configuration, 963 W of output power was measured. In a second configuration, a two amplifier Yb:YAG cryogenic system was driven with a fiber laser picosecond ultrafast oscillator at a 50 MHz repetition rate, double-passed through the first amplifier and single-passed through the second, resulting in 758 W of average power output. Pulses exiting the system have a FWHM pulsewidth of 12.4 ps, an energy/pulse of 15.2 μJ, and a peak power of 1.23 MW. Both systems are force convection-cooled with liquid nitrogen and have been demonstrated to run reliably over long time periods.

show abstract

Section: Yb:yag Thermal and Thermo-optic Properties At Reduced Tempermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High sustained average power cw and ultrafast Yb:YAG near-diffraction-limited cryogenic solid-state laser

Brown¹,

Singley²,

Kowalewski³

et al. 2010

Opt. Express

View full text Add to dashboard Cite

show abstract

“…Note, however, that polycrystalline diamond—which has a similar thermal conductivity to single crystal and can be readily grown in large wafers—provides a scalable avenue for contact cooling the gain crystal and with the added benefit of having an almost identical thermal expansion coefficient. Polycrystalline diamond heatsinks could then be actively cooled using conventional cooling techniques such as flowing liquid nitrogen . The megawatt level, which has been identified as the regime in which Kerr self‐focusing is likely to require consideration , may set the ultimate power limit.…”

Section: Resultsmentioning

confidence: 99%

Diamond‐based concept for combining beams at very high average powers

McKay

Spence

Coutts

et al. 2017

Laser & Photonics Reviews

View full text Add to dashboard Cite

Ever since the laser's invention, there has been great interest in increasing beam output power without detriment to its coherence. Despite great advances having been obtained through the use of a diverse range of approaches, steady‐state beam powers above ten kilowatts remain a significant challenge for solid‐state lasers due to the heightened impact of detrimental nonlinear effects such as thermal lensing. Multiplexing several lasers using beam combination represents a method for surpassing the power barriers of single lasers. Here we propose and demonstrate a novel approach to beam combination and power scaling based on Raman conversion in diamond. Power from multiple non‐collinear pump beams is efficiently transferred onto a single Stokes beam in a single‐pass amplifier. Using three mutually‐independent nanosecond pulsed beams from a free‐running‐linewidth 1064 nm laser, 69% of the total peak pump power of 6.7 kW was transferred onto a TEM00 Stokes seed pulse at 1240 nm in a 9.5 mm long diamond crystal. Compared to other beam combination techniques, diamond beam combination has advantages of relaxed constraints on pump beam mutual coherence, while enabling narrowband output. Thermal considerations for extending from low duty‐cycle to continuous wave operation and higher power levels are discussed.

show abstract

“…The only highly efficient systems with highest beam quality (i.e., M 2 close to 1) are CW lasers at cryogenic temperature [40][41][42] .…”

Section: Diode-pumped Solid-state Lasers (Dpssls)mentioning

confidence: 99%

Challenges of high power diode-pumped lasers for fusion energy

Garrec

2014

High Pow Laser Sci Eng

View full text Add to dashboard Cite

This paper reviews the different challenges that are encountered in the delivery of high power lasers as drivers for fusion energy. We will focus on diode-pumped solid-state lasers and we will highlight some of the main recent achievements when using ytterbium, cryogenic cooling and ceramic gain media. Apart from some existing fusion facilities and some military applications of diode-pumped solid-state lasers, we will show that diode-pumped solid-state lasers are scalable to inertial fusion energy (IFE)'s facility level and that the all-fiber laser scheme is very promising.

show abstract

2.3-kW continuous operation cryogenic Yb:YAG laser

Cited by 13 publications

References 0 publications

High sustained average power cw and ultrafast Yb:YAG near-diffraction-limited cryogenic solid-state laser

High sustained average power cw and ultrafast Yb:YAG near-diffraction-limited cryogenic solid-state laser

Diamond‐based concept for combining beams at very high average powers

Challenges of high power diode-pumped lasers for fusion energy

Contact Info

Product

Resources

About