Dataset for Continuous-Wave 3.1 – 3.6 μm Difference-Frequency Generation of Dual Wavelength-Tunable Fiber Sources in PPMgLN-Based Rapid-Tuning Design

Abstract

We report on single-frequency continuous wave (CW) difference frequency generation (DFG) based on single-frequency wavelength-tunable polarization-maintaining ytterbium- and erbium-doped fiber master oscillator power amplifiers (MOPAs), acting as the pump and signal source, respectively, and a 40-mm long periodically poled MgO-doped LiNbO3 (PPMgLN). Owing to the dual wavelength-tuning of the MOPAs, the generated idler light reaches a wavelength-tuning range close to 500 nm, from ~3117.2 to ~3598.8 nm, only by tuning the launched pump and signal wavelengths from 1040 nm to 1084.6 nm and from 1545.2 nm to 1561.4 nm, respectively, without any change of temperature or grating period of the PPMgLN. Compared to temperature-based idler-wavelength-tuning, this method is potentially faster in speed. The maximum idler power exceeds 60 mW, which is the highest reported power for a wavelength-tunable single-frequency CW DFG source. A rapidly broadband-tunable DFG source with tens of milliwatts of output power can be a practical tool for MIR molecular spectroscopy, detection and sensing at high measurement rates.

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