Two-octave-wide (3–12??µm) subharmonic produced in a minimally dispersive optical parametric oscillator cavity

Autor: Ru, Q., Kawamori, T., Schunemann, P. G., Vasilyev, S., Mirov, S. B., Vodopyanov, K. L.
Zdroj: Optics Letters; February 2021, Vol. 46 Issue: 4 p709-712, 4p
Abstrakt: We report a subharmonic (frequency-divide-by-2) optical parametric oscillator (OPO) with a continuous wavelength span of 3 to 12 µm (−37dB level) that covers most of the molecular rovibrational “signature” region. The key to obtaining such a wide spectral span is the use of an OPO with a minimal dispersion—through the choice of intracavity elements, the use of all gold-coated mirrors, and a special “injector” mirror. The system delivers up to 245 mW of the average power with the conversion efficiency exceeding 20% from a 2.35 µm Kerr-lens mode-locked pump laser.
Databáze: Supplemental Index