IR-supercontinuum seeded efficient two-stage transient stimulated Raman amplification in KGW with pulse compression

Augustinas Petrulenas; Paulius Mackonis; Aleksej M. Rodin; Vytenis Girdauskas

doi:10.1117/12.2576176

8 March 2021 IR-supercontinuum seeded efficient two-stage transient stimulated Raman amplification in KGW with pulse compression

Augustinas Petrulenas, Paulius Mackonis, Aleksej M. Rodin, Vytenis Girdauskas

Author Affiliations +

Proceedings Volume 11670, Nonlinear Frequency Generation and Conversion: Materials and Devices XX; 1167017 (2021) https://doi.org/10.1117/12.2576176
Event: SPIE LASE, 2021, Online Only

Abstract

We report efficient amplification of supercontinuum pulses in a stimulated Raman amplifier. The Yb:YAG pump laser produced 1.2 ps transform-limited pulses with an energy of 20 mJ at 100 Hz. Supercontinuum pulses in the wavelength range of 1050 – 2500 nm were obtained in a 15 mm YAG crystal. A larger portion of the laser energy was used to pump a two-stage stimulated Raman amplifier based on Np-cut KGW crystals with the main Stokes shifts of 768 and 901 cm^-1 . Spectral broadening to ~16 nm of amplified pulses at 901 cm^-1, conversion efficiency of 55%, and pulse width of ~145 fs after compression were demonstrated. Spectral synthesis of Stokes components at 768 and 901 cm^-1 provides an even wider spectrum up to ~38 nm, which corresponds to ~50 fs transform-limited pulse. The differences between collinear and non-collinear TSRCPA configurations are investigated in terms of conversion efficiency and gain bandwidth.

Conference Presentation

Citation Download Citation

Augustinas Petrulenas, Paulius Mackonis, Aleksej M. Rodin, and Vytenis Girdauskas "IR-supercontinuum seeded efficient two-stage transient stimulated Raman amplification in KGW with pulse compression", Proc. SPIE 11670, Nonlinear Frequency Generation and Conversion: Materials and Devices XX, 1167017 (8 March 2021); https://doi.org/10.1117/12.2576176

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