Abstract
Ultrafast laser systems are very popular for material processing applications. Commonly, these systems operate at repetition rates ranging from kHz to MHz regime. However, recent works [1] have demonstrated the potential of processing materials with bursts of GHz pulses and reported higher efficiencies. Despite these encouraging first demonstration, many aspects have still to be investigated. In our project, we aim to determine the best GHz laser regime to achieve higher efficiency and higher quality during material processing in the burst mode. Such an in-depth study is being carried out thanks to a versatile laser system developed in our lab [2]. In this contribution we will present our GHz pulse repetition rate (PRR) laser system continuously tunable from 1 to 18 GHz and able to operate in burst mode. The pulse duration at the output is compressed down to 1 ps. Additionally, the number of pulses per burst, i.e. the burst length is adjustable from a few to several thousands. Moreover, the shape of the envelop of each single burst can also be chosen and set to an arbitrary form (flat, ramped on or off …). Finally, the burst repetition rate (BRR) can be set from 20 kHz up to several tens of MHz. The average power reached up to 20 W which correspond to a maximum energy of about 1 mJ per burst at 20 kHz.
© 2019 IEEE
PDF ArticleMore Like This
Denis Marion, Jérôme Lhermite, Lilia Pontagnier, Adrien Aubourg, Pierre Héricourt, Giorgio Santarelli, and Eric Cormier
ATh5A.5 Advanced Solid State Lasers (ASSL) 2018
Önder Akçaalan, Hamit Kalaycioğlu, Parviz Elahi, Petro Deminskyi, and F. Ö. İlday
CF_12_2 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2017
André Loescher, Florian Bienert, Lilia Pontagnier, Eric Cormier, Giorgio Santarelli, Annalisa Guandalini, Matthias Kemnitzer, Jürg Aus der Au, Thomas Graf, and Marwan Abdou Ahmed
AW3A.4 Advanced Solid State Lasers (ASSL) 2023