Laser Physics Letters · 2015 · 11 citations · 13 references
EngineeringElectrical EngineeringMaterials ScienceOpticsOptoelectronicsPhotonicsFiber OpticsNonlinear Optical MaterialsNonlinear OpticsOptical FibersOptical SourcesUltrafast OpticsInfrared Nonlinear Optical MaterialsLaser Gain MaterialsNonlinear Frequency ConversionNonlinear Optical CrystalsOptical Frequency ConversionOptical Parametric OscillatorsPower Conversion EfficiencyPump Operation
We report, to the best of our knowledge, the first demonstration of a gain-switched fiber laser pumped tunable dual-wavelength optical parametric oscillator (OPO) operating around 3–5 µm. A homemade APMgLN crystal was used as the nonlinear material. A 'figure-of-h' shaped pump pulse was employed to improve the nonlinear conversion efficiency of the OPO. A maximum total idler output power of 4.82 W was obtained under pump power of 44.6 W with corresponding pump-to-idler conversion efficiency of 10.5%. The idler wavelengths were measured to be 3.34 and 3.65 μm at a temperature of 40 °C, which can be successfully tuned with a rate of about 2 nm °C−1 by adjusting the working temperature of the APMgLN crystal from 20 °C to 80 °C.
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