350 mJ electro-optically Q-switched 2.79 µm Cr:Er:YSGG MOPA

Journal Article · 17 May 2023 · Optics Express

DOI: https://doi.org/10.1364/OE.487602 · OSTI ID:1974261

Martyshkin, D. ; Fedorov, V. ; Hamlin, S. J.; Mirov, S.

We report on developing three flashlamp-pumped electro-optically Q-switched Cr:Er:YSGG lasers with the Q-switch based on a La ₃ Ga ₅ SiO ₁₄ crystal. The “short” laser cavity was optimized for high peak power applications. In this cavity, 300 mJ output energy in 15 ns pulses at a 3 Hz repetition rate was demonstrated with pump energy below 52 J. However, several applications, such as Fe:ZnSe pumping in a gain-switched regime, require longer (∼ 100 ns) pump pulse duration. We developed a 2.9 m long laser cavity that delivers 190 mJ of output energy in 85 ns pulses for these applications. We also demonstrated the Cr:Er:YSGG MOPA system producing 350 mJ output energy at 90 ns pulse duration and 47.5 J of pumping, corresponding to an amplification factor of 3.

• Sponsoring Organization: USDOE
• Grant/Contract Number: SC0018378
• OSTI ID: 1974261
• Alternate ID(s): OSTI ID: 2420777
• Journal Information: Optics Express, Journal Name: Optics Express Journal Issue: 11 Vol. 31; ISSN 1094-4087; ISSN OPEXFF
• Publisher: Optical Society of AmericaCopyright Statement
• Country of Publication: United States
• Language: English