Visible-pulse generation in gain crystal of near-infrared femtosecond optical parametric oscillator

• DOI: 10.1364/oe.23.025620
• Publication Date: 2015-09-21T19:41:58Z
• Authors: Tae-Young Jeong; Seung-Hyun Kim; Geon-Hee Kim; Ki-Ju Yee
• Keywords: Optical parametric amplifier; SIGNAL (programming language)

An optical parametric oscillator (OPO) based on magnesium-oxide-doped periodically poled lithium niobate (MgO:PPLN) is demonstrated to deliver visible femtosecond pulses, which were created through the intra-cavity nonlinear interactions within PPLN itself. The signal from OPO produces pulses in near-infrared region tunable 1050 1600 nm. Visible range of 522-800 nm and those 455-540 nm, respectively, generated via second-harmonic generation (SHG) photons sum-frequency (SFG) pump photons. Maximum output efficiencies 9.2% at 614 8.0% 522 for SHG SFG are attained, where efficient pulse relies quasi-phase matching with aid higher-order grating momentum.