K. A. Vereshchagin, S. N. Il'chenko, V. B. Morozov, A. N. Olenin, V. G. Tunkin, D. V. Yakovlev, S. D. Yakubovich, “Parametric amplification of broadband radiation of a cw superluminescent diode under picosecond pumping”, Kvantovaya Elektronika, 2016, Volume 46, Number 9,Pages <nobr>811

Nonlinear optical phenomena

Parametric amplification of broadband radiation of a cw superluminescent diode under picosecond pumping

K. A. Vereshchagin^a, S. N. Il'chenko^b, V. B. Morozov^cd, A. N. Olenin^cd, V. G. Tunkin^cd, D. V. Yakovlev^cd, S. D. Yakubovich^e

^a A.M. Prokhorov General Physics Institute Russian Academy of Sciences, Moscow
^b "Opton" LLC, Moscow
^c Lomonosov Moscow State University, Faculty of Physics
^d International Laser Center of Moscow State University
^e Moscow Technological University

Abstract: It is proposed to use cw superluminescent diodes with a spectral width of about 300 cm^-1 and high spatial coherence as seed radiation sources in parametric amplifiers with picosecond pumping in order to form broadband picosecond pulses. A two-cascade parametric amplifier based on BaB₂O₄ (BBO) crystals is pumped by 20-ps pulses of the second harmonic of an Nd : YAG laser. For a superluminescent diode spectral width of 275 cm^-1 (centre wavelength 790 nm), the spectral width of picosecond pulses at the parametric amplifier output is 203 cm^-1. At a total pump energy of 7.2 mJ for BBO crystals, the energy of the enhanced emission of the superluminescent diode is found to be 0.6 mJ.

Keywords: parametric amplification, picosecond pumping, superluminescent diode.

Received: 10.06.2016