High-energy picosecond light source based on cryogenically conduction cooled Yb-doped laser amplifier

Sikocinski, Pawel; Miura, Taisuke; Venkatesan, J.; Chyla, Michal; Severová, Patricie; Endo, Akira; Mocek, Tomáš

doi:10.1117/12.2037764

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…We have evaluated the temperature dependence of single pass gain and gain bandwidth of the Yb:YAG crystal utilizing our improved spatial and spectral resolved gain measurement method which was introduced in [7]. 2 mm thick and 10 mm in diameter 3at.% Yb:YAG crystal was mounted in the cooper holder in a closed loop (pulse tube) cryostat with cooling capacity of 27 W at 150 K. The gain medium was pumped by a fiber-coupled laser diode with maximum output power of 25 W (core diameter = 105 µm and NA = 0.15).…”

Section: In-situ Gain Measurementmentioning

confidence: 99%

Development of a closed-loop cryogenically cooled sub-picosecond regenerative amplifier

et al. 2015

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We are developing joule level picosecond pulse duration laser system operating at repetition rate of 120 Hz. The laser system consists of a seed mode-locked fiber laser and two cryogenically cooled amplifier stages: a single slab regenerative amplifier and a single slab multi-pass amplifier. We have found the displacement of the probe beam caused by mechanical vibrations of the cryostat is less than 0.7 µrad. We have also improved our in-situ gain measurement system by decreasing the spectral line of the narrow band source down to 50 pm. We have found that the emission bandwidth of Yb:YGAG at 160 K is around 7 nm.

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Section: In-situ Gain Measurementmentioning

confidence: 99%

Development of a closed-loop cryogenically cooled sub-picosecond regenerative amplifier

et al. 2015

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“…High energy pulses close to 1 J at a few hundred Hz with a pulse duration of 1-5 ps have been achieved, e.g. [25][26][27][28][29]. According to TRUMPF Scientific Lasers a 100 Hz, 2 J, 300 ps Yb:YAG laser could be developed on the basis of their technology.…”

Section: Jinst 11 P02003mentioning

confidence: 99%

LIDAR Thomson scattering for ITER core plasma revisited

Gowers

Nielsen

Salzmann³

2016

J. Inst.

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The authors have become aware that the development of the hitherto planned time-offlight Thomson scattering system for the ITER core plasma is not proceeding and that conventional Thomson scattering set-ups are being discussed as an alternative. In this paper, we want to point out the advantages of LIDAR and show how criticized details of the original design can be improved. We present a design of the front optics, which in neutronics terms closely resembles a layout already previously accepted. The presented design does not require Raman scattering calibration for the density measurement. Comparison with the JET Core LIDAR system and simulations at higher temperatures both show that with the new design the specified accuracy can be met with a 1-2 J laser. Current laser and detector technology is reviewed. A strategy for how to proceed is presented. K: Nuclear instruments and methods for hot plasma diagnostics; Electron multipliers (vacuum); Photon detectors for UV, visible and IR photons (gas) (gas-photocathodes, solidphotocathodes) 1Corresponding author.

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High-energy picosecond light source based on cryogenically conduction cooled Yb-doped laser amplifier

Cited by 2 publications

References 4 publications

Development of a closed-loop cryogenically cooled sub-picosecond regenerative amplifier

Development of a closed-loop cryogenically cooled sub-picosecond regenerative amplifier

LIDAR Thomson scattering for ITER core plasma revisited

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