High energetic and highly stable pulses from a Ho:YLF regenerative amplifier

Peter Kroetz; Axel Ruehl; Gourab Chatterjee; Anne-Laure Calendron; Krishna Muraria; Huseyin Cankaya; Franz X. Kärtnera; Ingmar Hartl; R. J. Dwayne Miller

doi:10.1117/12.2212236

16 March 2016 High energetic and highly stable pulses from a Ho:YLF regenerative amplifier

Peter Kroetz, Axel Ruehl, Gourab Chatterjee, Anne-Laure Calendron, Krishna Muraria, Huseyin Cankaya, Franz X. Kärtnera, Ingmar Hartl, R. J. Dwayne Miller

Author Affiliations +

Proceedings Volume 9726, Solid State Lasers XXV: Technology and Devices; 97260S (2016) https://doi.org/10.1117/12.2212236
Event: SPIE LASE, 2016, San Francisco, California, United States

Abstract

We present results from our Ho:YLF regenerative amplifier (RA) producing up to 6.9 mJ at a repetition rate of 1 kHz and up to 12.9 mJ at a repetition rate of 10 Hz. At 1 kHz, we observe strongly bifurcating pulses, starting with certain round trip number, but the measurements identify a highly stable operation point that lies “hidden” beyond the instability region. This operation point allows the extraction of highly stable and high energetic output pulses. Suppression of bifurcation in our system is presented for repetition rates below 750 Hz and Ho:YLF crystal holder temperatures of 2.5 °C. We furthermore present a stability optimization routine for our Ho:YLF RA that was operated close to gain depletion at a repetition rate of 100 Hz. By varying the Ho:YLF crystal holder temperature the gain depletion level could be fine adjusted, resulting in a highly stable RA system with measured pulse fluctuations of only 0.35 %.

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Peter Kroetz, Axel Ruehl, Gourab Chatterjee, Anne-Laure Calendron, Krishna Muraria, Huseyin Cankaya, Franz X. Kärtnera, Ingmar Hartl, and R. J. Dwayne Miller "High energetic and highly stable pulses from a Ho:YLF regenerative amplifier", Proc. SPIE 9726, Solid State Lasers XXV: Technology and Devices, 97260S (16 March 2016); https://doi.org/10.1117/12.2212236

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