High-energy picosecond kHz optical parametric oscillator/amplifier tunable between 3 and 3.5 µm

High brightness widely tunable, hundred picosecond mid-IR MgO:PPLN optical parametric oscillator with short cavity

“…2 × M y 2 = 2.53 × 2.39). The idler brightness achieved in this paper was an order of magnitude higher, compared with previously reported results in [13] (1.1 W, M x 2 = 42, M y 2 = 46, B = 0.0063 MW sr cm −2 ) and [14] (2.05 W, M x 2 = 31, M y 2 = 32, B = 0.023 MW sr cm −2 ). The signal pulse train and duration were measured because that the responding wavelength range was 350-1700 nm for the detector (ALPHALAS GMBJ, UPD-40-UVIR-P) so that the pulse width of the idler pulse could not be directly measured.…”

“…It delivered an idler energy of 4.1 mJ at 3 µm and a beam quality of M x 2 = 31, M y 2 = 32. Accordingly, the brightness B was 0.023 MW sr cm −2 [14]. Very new, a MgO:PPLN OPO with a 42 mm long plane-plane cavity, pumped by a 490 ps pulse laser at 1064 nm at 1 kHz was demonstrated.…”