Kilowatt-class high-energy frequency conversion to 95 J at 10 Hz at 515 nm

Divoky, Martin; Phillips, Jonathan; Pilar, Jan; Hanus, Martin; Navratil, Petr; Denk, Ondrej; Paliesek, Tomas; Severova, Patricie; Clarke, Danielle; Smrz, Martin; Butcher, Thomas; Edwards, Chris; Collier, John; Mocek, Tomas

doi:10.1017/hpl.2023.60

Cited by 4 publications

References 9 publications

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Power output optimization in complex laser systems by means of polarization control

Jochcová,

Slezák,

Richter

et al. 2024

J. Opt.

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Recently, the polarimetric method for thermally-induced polarization changes driven power losses (TIPCL) mitigation in complex laser systems has been developed. However, the final optimization relied on the four-parameter numerical process. This article provides a fully analytical direct calculation alternative to this optimization process. The validity of this approach is demonstrated on the previously published data from pulsed laser system Bivoj/DiPOLE100. The new approach provides a deeper insight into the polarimetric method for TIPCL suppression and also brings a more precise, reliable, and faster alternative to the numerical process used earlier.

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Power output optimization in complex laser systems by means of polarization control

Jochcová,

Slezák,

Richter

et al. 2024

J. Opt.

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Sub-150 J/10 Hz DPSS Pulsed Laser Bivoj with 2^nd and 3^rd Harmonic Frequency Conversion

Divoký,

Pilar,

Slezak

et al. 2024

2024 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)

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45 W average-power, high-energy deep-UV generation at 257 nm in LBO

Mennerat,

Bizet,

Mahieu

et al. 2024

Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII

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We report on high average-power, high-energy picosecond fourth-harmonic generation in LBO. The first stages of a Yb:YAG laser chain operating at 1 kHz repetition rate generate few-picosecond 220 mJ chirped pulses at 1030 nm fundamental wavelength. They are frequency-converted in a cascade of three LBO crystals to generate the second-, third-, and fourth-harmonics at 515 nm, 343 nm and 257 nm respectively. Crystals thicknesses and angular phase-matching detuning were calculated as a function of pulse duration through broadband nonlinear optical numerical simulations. Last crystal is both conduction-cooled on edge and surface-cooled at center through forced-air flow to mitigate heating due to nonlinear absorption in the deep-UV and reduce temperature gradients. Chirped-pulse duration was experimentally adjusted to achieve stable 20% overall conversion efficiency. Near-field beam profiles were continuously recorded at 10 Hz, for all four wavelengths involved, together with corresponding energies, showing no significant beam degradation over 50 hours. Temperatures of the two last crystals were monitored, and will help optimize surface cooling for future power ramping-up.

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Kilowatt-class high-energy frequency conversion to 95 J at 10 Hz at 515 nm

Cited by 4 publications

References 9 publications

Power output optimization in complex laser systems by means of polarization control

Power output optimization in complex laser systems by means of polarization control

Sub-150 J/10 Hz DPSS Pulsed Laser Bivoj with 2^nd and 3^rd Harmonic Frequency Conversion

45 W average-power, high-energy deep-UV generation at 257 nm in LBO

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Kilowatt-class high-energy frequency conversion to 95 J at 10 Hz at 515 nm

Cited by 4 publications

References 9 publications

Power output optimization in complex laser systems by means of polarization control

Power output optimization in complex laser systems by means of polarization control

Sub-150 J/10 Hz DPSS Pulsed Laser Bivoj with 2nd and 3rd Harmonic Frequency Conversion

45 W average-power, high-energy deep-UV generation at 257 nm in LBO

Contact Info

Product

Resources

About

Sub-150 J/10 Hz DPSS Pulsed Laser Bivoj with 2^nd and 3^rd Harmonic Frequency Conversion