Abstract
We report here a 3.1 µm band tunable fiber gas laser source based on acetylene-filled nodeless hollow-core fibers with low losses at both the pump and laser wavelengths. The gas is pumped in the first-order rotational–vibrational overtones near the 1.5 µm region by a modulated, amplified narrowband and accurately tunable diode laser; then 3 µm lasing transmissions are generated in the single-pass amplified spontaneous emission regime. The laser wavelength is step-tunable in the range of 3.09–3.21 µm when the pump laser is precisely tuned to different absorption lines of the P-branch of acetylene molecules. Furthermore, this system can be extended to other selected gases to generate tunable output in the spectral band up to 5 µm.
Published Version
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