Abstract
We report the generation of tunable high-repetition-rate picosecond pulses in the near-infrared at high average power with record conversion efficiency using single-pass optical parametric generation (OPG) and amplification (OPA) in MgO:PPLN, for the first time, to the best of our knowledge. By deploying a mode-locked Yb-fiber laser at 1064 nm providing 21 ps pump pulses at 80 MHz, and a cascade of two 50-mm-long MgO:PPLN crystals, we generate up to 8.3 W of total average output power at a conversion efficiency of 59% over a tunable range of 513 nm, across 1902–2415 nm, with a record threshold as low as 600 mW (7.5 nJ). The two-stage OPG-OPA scheme provides control over fine wavelength tuning and output spectral bandwidths, enabled by the independent control of phase-matching in each crystal. The OPG-OPA output exhibits high spatial beam quality and excellent passive power and central wavelength stability better than 0.9% rms and 0.1% rms, respectively, over 1 hour. The output pulses have a duration of ${\sim}{{11}}\;{\text{ps}}$, with a 10 dB bandwidth of ${\sim}{{350}}\;{\text{nm}}$ at 2107 nm.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
S. Chaitanya Kumar, B. Nandy, and M. Ebrahim-Zadeh
Opt. Express 28(26) 39189-39202 (2020)
Sukeert, S. Pizzurro, A. Esteban-Martín, R. Gotti, L. Carrà, G. Piccinno, A. Agnesi, F. Pirzio, S. Chaitanya Kumar, and M. Ebrahim-Zadeh
Opt. Lett. 48(22) 6008-6011 (2023)
S. Chaitanya Kumar, Junxiong Wei, J. Debray, Vincent Kemlin, B. Boulanger, Hideki Ishizuki, T. Taira, and M. Ebrahim-Zadeh
Opt. Lett. 40(16) 3897-3900 (2015)