PPMgLN-Based High-Power Optical Parametric Oscillator Pumped by Yb $^{{\bm 3}{\bm +}}$-Doped Fiber Amplifier Incorporates Active Pulse Shaping

High-power PPMgLN-based optical parametric oscillator pumped by a linearly polarized, semi-fiber-coupled acousto-optic Q-switched fiber master oscillator power amplifier

“…According to these requirements, fiber lasers are supposed to be the best candidates among all the OPO pump sources due to their compactness, robustness, excellent beam quality, and simple thermal management schemes [3]. Therefore, fiber-laser-pumped OPOs have been extensively investigated from continuous wave (CW) to ultrashort pulsed operation schemes [4][5][6][7][8][9][10][11][12][13]. Among all these pump sources, fiber lasers with tens to hundreds of nanoseconds are particularly useful in outdoor applications for both environmental monitoring and missile countermeasures because simple linear cavities are applicable to such pump sources converting the pump power to idler output efficiently during each pulse with peak power higher than the CW OPOs and dimensions smaller than the synchronously pumped OPOs.…”

“…Among all these pump sources, fiber lasers with tens to hundreds of nanoseconds are particularly useful in outdoor applications for both environmental monitoring and missile countermeasures because simple linear cavities are applicable to such pump sources converting the pump power to idler output efficiently during each pulse with peak power higher than the CW OPOs and dimensions smaller than the synchronously pumped OPOs. Consequently, many experiments have been carried out on linearcavity-structured OPOs pumped by master oscillator power amplifier (MOPA) configured fiber lasers working in the nanosecond region so far [9][10][11][12][13].…”

“…Although an active pulse-shaping technique could enable the fiber amplifiers to eliminate the nonlinear effects and to compensate the gain saturation effect with enhanced conversion efficiencies in OPOs, the low average power of the seed lasers would require a chain of fiber amplifiers to boost the output power to tens of watts, which would make them less costeffective [9][10][11]. Our former experiment has demonstrated an improved OPO system pumped by a fully fiberized MOPA system with only one stage of amplification.…”

40 μm, high repetition rate periodically poled magnesium-oxide-doped lithium niobate mid-infrared optical parametric oscillator pumped by steep leading edge pulsed fiber laser

“…A periodically poled magnesium-oxide-doped lithium niobate (PPMgLN) based optical parametric oscillator (OPO) provides an attractive approach to the mid-IR laser for its wide tunability and various tuning modes. Compared with the solid laser, the fiber laser has advantages of high power, excellent beam quality, simple thermal management schemes, and high electrical-optical conversion efficiency [3,4]. Therefore the fiber laser has been widely employed as the OPO pump source.…”

An all-fiber PM MOPA pumped high-power OPO at 3.82 μm based on large aperture PPMgLN

“…We have previously reported a pulsed fiber master oscillator power amplifier (MOPA) pumped OPO based on a 50 mm × 1 mm × 1 mm PPMgLN crystal [10]. An overall OPO output power of 11 W (with 2.7 W of idler power at 3.5 µm) was achieved pumped by a 28 W MOPA.…”