Supercontinuum generation in scintillator crystals DOI Creative Commons

Vaida Marčiulionytė,

G. Tamošauskas,

Matas Šutovas

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 4, 2025

Abstract We present a comparative experimental study of supercontinuum generation in undoped scintillator crystals: bismuth germanate (BGO), yttrium orthosilicate (YSO), lutetium oxyorthosilicate (LSO), (LYSO) and gadolinium gallium garnet (GGG), pumped by 180 fs fundamental harmonic pulses an amplified Yb:KGW laser. In addition to these materials, experiments aluminium (YAG), potassium tungstate (KGW) lithium tantalate (LT) were performed under identical settings (focusing geometry sample thickness), which served for straightforward comparison performances. The threshold optimal (that produces optimized red-shifted spectral extent) pump pulse energies evaluated from detailed measurements broadening dynamics. measured cut-off wavelengths at the short-wavelength side are line with general trend blue-shifted on bandgap nonlinear material. All materials produced reasonable broadenings conditions energies, largest red-shift exceeding 2000 nm GGG crystal. Our results revealed that BGO (which also had lowest threshold) offer durable, optical damage-free performance laser repetition rate 200 kHz, suggesting good alternatives YAG KGW low threshold, high average power near- short-wave infrared ranges. demonstrated scintillating properties bulk could be readily studied filamentation regime, via multiphoton excitation using near-infrared femtosecond pulses.

Language: Английский

Supercontinuum generation in scintillator crystals DOI Creative Commons

Vaida Marčiulionytė,

G. Tamošauskas,

Matas Šutovas

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 4, 2025

Abstract We present a comparative experimental study of supercontinuum generation in undoped scintillator crystals: bismuth germanate (BGO), yttrium orthosilicate (YSO), lutetium oxyorthosilicate (LSO), (LYSO) and gadolinium gallium garnet (GGG), pumped by 180 fs fundamental harmonic pulses an amplified Yb:KGW laser. In addition to these materials, experiments aluminium (YAG), potassium tungstate (KGW) lithium tantalate (LT) were performed under identical settings (focusing geometry sample thickness), which served for straightforward comparison performances. The threshold optimal (that produces optimized red-shifted spectral extent) pump pulse energies evaluated from detailed measurements broadening dynamics. measured cut-off wavelengths at the short-wavelength side are line with general trend blue-shifted on bandgap nonlinear material. All materials produced reasonable broadenings conditions energies, largest red-shift exceeding 2000 nm GGG crystal. Our results revealed that BGO (which also had lowest threshold) offer durable, optical damage-free performance laser repetition rate 200 kHz, suggesting good alternatives YAG KGW low threshold, high average power near- short-wave infrared ranges. demonstrated scintillating properties bulk could be readily studied filamentation regime, via multiphoton excitation using near-infrared femtosecond pulses.

Language: Английский

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