Facilities & Equipment
150-TW laser
Brief description of 150-TW Ti:sapphire Laser
A 150-TW Ti:sapphire laser based on a chirped-pulse amplification technique has been operated at 5- Hz repetition rate. The broad bandwidth of 76 nm (FWHM) was achieved by compensating for the gain depletion effect, and the short pulse duration of 23 fs (FWHM) was obtained by minimizing the spectral phase error. The low ASE level of ≤10−11 was achieved by employing an ultrafast Pockels cell and a double plasma mirror. Low residual wavefront aberrations with a 0.035-μm RMS value were also obtained after applying the adaptive optics technique after the pulse compressor. Through analysis of the measured multi-spectral wavefront, the peak intensity at the focus was shown to have been reduced slightly due to spatiotemporal couplings. This high-spatiotemporal quality, 5-Hz, 150-TW Ti:sapphire laser is a versatile tool in the fields of high-field physics and laser driven particle acceleration.
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Layout of 5-Hz 150-TW Ti:sapphire Laser
Specifications of 150-TW Ti:sapphire Laser
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Spectra after amplifiers in 150-TW laser
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Temporal profile of 150-TW laser pulse
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Temporal contrasts of 150-TW laser pulse
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Wavefront maps of 150-TW laser pulse
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UPC: ultrafast Pockels cell, DPM: double plasma mirror
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before and (b) after applying adaptive optics PV : Peak-to-valley
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Pulse front map of 150-TW laser beam
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(a) Pulse front map of 150-TW laser beam and (b) pulse fronts in horizontal and the vertical cuts across the center of the laser beam
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Temporally integrated spatial profiles at the focus (calculation)
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Horizontal and (b) vertical directions, and (c) spatially integrated temporal profiles at the focus. All calculations were performed assuming that the focusing optics had a 1-m focal length (∼ f /15). STC: spatiotemporal coupling
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