Abstract
The development of kW-class diode-pumped picosecond laser sources emitting at various wavelengths started at the HiLASE Center four years ago. A 500-W Perla C thin-disk laser with a diffraction limited beam and repetition rate of 50–100 kHz, a frequency conversion to mid-infrared (mid-IR), and second to fifth harmonic frequencies was demonstrated. We present an updated review on the progress in the development of compact picosecond and femtosecond high average power radiation sources covering the ultraviolet (UV) to mid-IR spectral range at the HiLASE Center. We also report on thin-disk manufacturing by atomic diffusion bonding, which is a crucial technology for future high-power laser development.
Highlights
Compact, kW-class, near-infrared pulsed lasers are becoming highly important for both science and industry
A dual Pockels cell equipped by barium borate (BBO) crystals with dimensions of 10 × 10 × 25 mm3 for each of the crystals placed in in-house developed holders is operated at a half-wave voltage of 10-kV and a repetition rate of 50 or 100 kHz
Development of reliable and compact kW-class thin-disk-based picosecond lasers continues at the HiLASE Center
Summary
KW-class, near-infrared pulsed lasers are becoming highly important for both science and industry. The growth of large volume conversion crystals and the advent of new kinds of nonlinear crystals enables efficient conversion of high average power and high energy picosecond near-infrared (near-IR) pulses with a wavelength of 1 μm to deep ultraviolet (UV) [9,10] or mid-infrared (mid-IR) spectral regions [11,12]. This broadens the application potential of near-infrared ultrashort-pulse lasers in high-tech applications. Chirped volume Bragg grating-based; OPG: optical parametric generation; OPA: optical parametric amplification
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