High-repetition-rate and high-power picosecond regenerative amplifier based on a single bulk Nd:GdVO4 crystal. (13th June 2019)

• Record Type: Journal Article
• Authors: Guo, Jie; Wang, Wei; Lin, Hua; Liang, Xiaoyan
• Is Part Of: High power laser science and engineering. Volume 7(2019)
• Publication Date: 2019-06-13
• Subjects: diode-pumped solid state laser, -- high repetition rate regenerative amplifier, -- picosecond laser; High power lasers -- Periodicals; 621.366
• DOI: 10.1017/hpl.2019.16
• Languages: English
• ISSNs: 2095-4719

Abstract

Abstract : We report on a high-repetition-rate, high-power continuously pumped Nd:GdVO4 regenerative amplifier. Numerical simulations successfully pinpoint the optimum working point free of bifurcation instability with simultaneous efficient energy extraction. At a repetition rate of 100 kHz, a maximum output power of 23 W was obtained with a pulse duration of 27 ps, corresponding to a pulse energy of $230~\unicode[STIX]{x03BC}\text{J}$ . The system displayed an outstanding stability with a root mean square power noise as low as 0.3%. The geometry of the optical resonator and the pumping scheme enhanced output power in the $\text{TEM}_{00}$ mode with a single bulk crystal. Accordingly, nearly diffraction-limited beam quality was produced with $M^{2}\approx 1.2$ at full pump power.