Technology of thin-rod Yb : YAG amplifiers with a high pulse energy and average power. (April 2020)

• Record Type: Journal Article
• Authors: Kuznetsov, I.I.; Chizhov, S.A.; Mukhin, I.B.; Palashov, O.V.
• Is Part Of: Quantum electronics. Volume 50:Number 4(2020)
• Page Start: 327
• Page End: 330
• Publication Date: 2020-04
• Subjects: solid-state laser amplifier -- diode-pumped Yb :YAG lasers -- high-peak and average-power lasers; Quantum electronics -- Periodicals; 537.5
• DOI: 10.1070/QEL17279
• Languages: English
• ISSNs: 1063-7818

Abstract

Abstract: Technology for producing thin-rod Yb : YAG laser amplifiers is improved, which is aimed at increasing the output pulse energy and includes the development of a new method for mounting active elements into a cooling system and employment of more persistent dielectric coatings of rod ends. An influence of a thermal lens on the beam size in an active element is theoretically studied and the parameters are found, which provide equal beam sizes at input and output rod ends. The output pulse energy of 4 mJ is obtained without optical breakdown of the output end, which substantially exceeds the previously obtained results. The amplifier demonstrates an average power of 60 W and maintains a high beam quality.