Laser Technology Development for High Peak Power Lasers Achieving Kilowatt Average Power and Beyond

Sistrunk, Emily; Alessi, D.; Bayramian, Andrew James; Chesnut, Kyle; Erlandson, Alvin C.; Galvin, Thomas C.; Gibson, D. J.; Nguyễn, Hoàng Tùng; Reagan, Brendan; Schaffers, Kathleen I.; Siders, C. W.; Spinka, Thomas; Haefner, C.

doi:10.1117/12.2525380

Cited by 25 publications

(14 citation statements)

References 29 publications

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“…For a continuous-wave (cw)-laser with power P and circular polarization, the curvature component relevant to a resonator with axis perpendicular to the beam line of the laser is given by (see eqs. (48)(49)(50) in [27], and eq. ( 1) in [28]) the observer in the x-z-plane), neglecting the exponentially decaying term, and switching back to dimensionfull coordinates, we arrive at…”

Section: Potential Sources and Their Gravitational Field A Laser Puls...mentioning

confidence: 99%

“…Using larger laser spots on the mirrors of the cavity should allow for even stronger pump lasers to be used. With stronger pump lasers, such as the BAT laser in [50] with P pump = 300 kW, an average power within the cavity in the 100 MW range seems plausible.…”

Section: Short Pulsesmentioning

confidence: 99%

“…A mirror mounted on some mechanics might reduce the precision of its positioning and hence the cavity's finesse. Nonetheless, with a high finesse cavity ( 2F π ∼ 10 5 ) and high-average-power pump lasers (P pump ≈ 300 kW [50] ) an average power > 20 GW in the cavity would be achievable. One limitation when scaling to higher powers is damage to the mirrors.…”

Section: Short Pulsesmentioning

confidence: 99%

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Perspectives of measuring gravitational effects of laser light and particle beams

Spengler,

Rätzel,

Braun

2021

Preprint

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We study possibilities of creation and detection of oscillating gravitational fields from lab-scale high energy, relativistic sources. The sources considered are high energy laser beams in an optical cavity and the ultra-relativistic proton bunches circulating in the beam of the Large Hadron Collider (LHC) at CERN. These sources allow for signal frequencies much higher and far narrower in bandwidth than what most celestial sources produce. In addition, by modulating the beams, one can adjust the source frequency over a very broad range, from Hz to GHz. The gravitational field of these sources and responses of a variety of detectors are analyzed. We find that with the planned high-luminosity upgrade of the LHC and an improved design of a recently experimentally demonstrated monolithic pendulum [1], a signal to noise ratio substantially larger than 1 should be achievable. This opens new perspectives of studying general relativistic effects and possibly quantum-gravitational effects with ultra-relativistic, well-controlled terrestrial sources.

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Section: Potential Sources and Their Gravitational Field A Laser Puls...mentioning

confidence: 99%

Section: Short Pulsesmentioning

confidence: 99%

Section: Short Pulsesmentioning

confidence: 99%

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Perspectives of measuring gravitational effects of laser light and particle beams

Spengler,

Rätzel,

Braun

2021

Preprint

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“…A 2 µm wavelength, between the widely investigated 1 and 10 µm, is an interesting candidate providing intermediate plasma densities and hence optical depth. In addition to 2 µm systems based on difference frequency generation [33,36,37], high-power Big Aperture Thulium (BAT) laser systems, operating at 1.9 µm wavelength, are currently under development [38,39].…”

Section: Introductionmentioning

confidence: 99%

Characterization of angularly resolved EUV emission from 2-µm-wavelength laser-driven Sn plasmas using preformed liquid disk targets

Schupp

Behnke

Bouza

et al. 2021

J. Phys. D: Appl. Phys.

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The emission properties of tin plasmas, produced by the irradiation of preformed liquid tin targets by several-ns-long 2 µm-wavelength laser pulses, are studied in the extreme ultraviolet (EUV) regime. In a two-pulse scheme, a pre-pulse laser is first used to deform tin microdroplets into thin, extended disks before the main (2 µm) pulse creates the EUV-emitting plasma. Irradiating 30-to 300 µm-diameter targets with 2 µm laser pulses, we find that the efficiency in creating EUV light around 13.5 nm follows the fraction of laser light that overlaps with the target. Next, the effects of a change in 2 µm drive laser intensity (0.6-1.8 × 10 11 W cm −2 ) and pulse duration (3.7-7.4 ns) are studied. It is found that the angular dependence of the emission of light within a 2% bandwidth around 13.5 nm and within the backward 2π hemisphere around the incoming laser beam is almost independent of intensity and duration of the 2 µm drive laser. With increasing target diameter, the emission in this 2% bandwidth becomes increasingly anisotropic, with a greater fraction of light being emitted into the hemisphere of the incoming laser beam. For direct comparison, a similar set of experiments is performed with a 1 µm-wavelength drive laser. Emission spectra, recorded in a 5.5-25.5 nm wavelength range, show significant self-absorption of light around 13.5 nm in the 1 µm case, while in the 2 µm case only an opacity-related broadening of the spectral feature at 13.5 nm is observed. This work demonstrates the enhanced capabilities and performance of 2 µm-driven plasmas produced from disk targets when compared to 1 µm-driven plasmas, providing strong motivation for the use of 2 µm lasers as drive lasers in future high-power sources of EUV light.

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“…A 2-µm wavelength, between the widely investigated 1 and 10 µm, is an interesting candidate providing intermediate plasma densities and hence optical depth. In addition to 2-µm systems based on difference frequency generation [31,34,35], high-power Big Aperture Thulium (BAT) laser systems, operating at 1.9-µm wavelength, are currently under development [36,37].…”

Section: Introductionmentioning

confidence: 99%

Characterization of angularly resolved EUV emission from 2-$μ$m-wavelength laser-driven Sn plasmas using preformed liquid disk targets

Schupp,

Behnke,

Bouza

et al. 2021

Preprint

View full text Add to dashboard Cite

The emission properties of tin plasmas, produced by the irradiation of preformed liquid tin targets by severalns-long 2-µm-wavelength laser pulses, are studied in the extreme ultraviolet (EUV) regime. In a two-pulse scheme, a pre-pulse laser is first used to deform tin microdroplets into thin, extended disks before the main (2 µm) pulse creates the EUV-emitting plasma. Irradiating 30-to 300-µm-diameter targets with 2-µm laser pulses, we find that the efficiency in creating EUV light around 13.5 nm follows the fraction of laser light that overlaps with the target. Next, the effects of a change in 2-µm drive laser intensity (0.6-1.8 × 10 11 W/cm 2 ) and pulse duration (3.7-7.4 ns) are studied. It is found that the angular dependence of the emission of light within a 2% bandwidth around 13.5 nm and within the backward 2π hemisphere around the incoming laser beam is almost independent of intensity and duration of the 2-µm drive laser. With increasing target diameter, the emission in this 2% bandwidth becomes increasingly anisotropic, with a greater fraction of light being emitted into the hemisphere of the incoming laser beam. For direct comparison, a similar set of experiments is performed with a 1-µm-wavelength drive laser. Emission spectra, recorded in a 5.5-25.5 nm wavelength range, show significant self-absorption of light around 13.5 nm in the 1-µm case, while in the 2-µm case only an opacity-related broadening of the spectral feature at 13.5 nm is observed. This work demonstrates the enhanced capabilities and performance of 2-µm-driven plasmas produced from disk targets when compared to 1-µmdriven plasmas, providing strong motivation for the use of 2-µm lasers as drive lasers in future high-power sources of EUV light.

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Laser Technology Development for High Peak Power Lasers Achieving Kilowatt Average Power and Beyond

Cited by 25 publications

References 29 publications

Perspectives of measuring gravitational effects of laser light and particle beams

Perspectives of measuring gravitational effects of laser light and particle beams

Characterization of angularly resolved EUV emission from 2-µm-wavelength laser-driven Sn plasmas using preformed liquid disk targets

Characterization of angularly resolved EUV emission from 2-$μ$m-wavelength laser-driven Sn plasmas using preformed liquid disk targets

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