An all-diode pumped 1.28-Joule, 200-picosecond Nd:YAG laser amplifier at 10 Hz

Development of an all-diode pumped Nd:YAG laser system with an energy of 1280 mJ in 200 ps pulses at a repetition of 10 Hz is presented. The system comprises a 17-mJ pulse energy seed source, two double-pass side-pumped pre-amplifiers, and a single-pass side-pumped booster amplifier with the beam di...

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Bibliographic Details
Published in:Optics communications 2025-03, Vol.577, p.131413, Article 131413
Main Authors: Raza, Kashif, Khan, Hamid Ahmad, Khan, Sabih D, Shahzad, Arslan, Mahmood, M. Ahsan, Saif, Muhammad, Mumtaz, Muhammad, Anjum, Naveed, Ahmad, Izhar
Format: Article
Language:English
Subjects:
Beam shaping
Diode pumped lasers
High energy laser
Nd:YAG
Picosecond laser
Serrated aperture
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Summary:Development of an all-diode pumped Nd:YAG laser system with an energy of 1280 mJ in 200 ps pulses at a repetition of 10 Hz is presented. The system comprises a 17-mJ pulse energy seed source, two double-pass side-pumped pre-amplifiers, and a single-pass side-pumped booster amplifier with the beam diameters of 6 mm, 7 mm, 10 mm and 16 mm, respectively. Beam apodization has been performed, using an in-house machined high-damage threshold serrated aperture, at significantly higher laser intensity for modification of spatial beam profile. Relay imaging and spatial filtering have also been incorporated to preserve the beam profile during propagation of the beam to next amplification stage. Circular polarization have been used in each amplifier to mitigate the effects of intensity dependent nonlinearity. Energy fluence and B-integral have been calculated for the actual beam shape which are well within the safe-amplification limits. Our experimental findings are very close to the calculated values. The system is a potential candidate in short-pulsed optical parametric chirped pulse amplification, material processing, and medical applications.
ISSN:0030-4018
DOI:10.1016/j.optcom.2024.131413