Near-infrared ultra-wideband wavelength measurement for fiber laser
A miniaturized,high-precision wavelength measurement technology for near-infrared ultra-wideband single-frequency fiber lasers in the 0.8-2.4 μm range is proposed,based on the principle of the Michelson interferometer.The optical components utilized are compatible with the entire near-infrared band(0.8-2.4 μm).A servo motor translation stage with a maximum stroke of 50 mm,combined with a double-folded optical path design,enables an optical path difference four times the horizontal displace-ment.Signal acquisition and processing are performed using a high-speed acquisition card and a LabVIEW-based upper computer program,achieving miniaturization,high precision,and rapid measurement.A nov-el sampling number equivalent resolution method is introduced to simplify the wavelength resolution design process,establishing a direct numerical relationship between wavelength resolution and the number of sam-pling points,while allowing other parameters to be adjusted independently.Wavelength measurement ex-periments were conducted on five typical single-frequency lasers(0.8,1.06,1.55,1.94,and 2.05 μm),and the results were compared with those obtained using a commercial high-precision waveme-ter.The experimental results demonstrate the effectiveness of the proposed method,with a single mea-surement time of 1.5 s,measurement accuracies of±1.4,±1.1,±1.2,±1.2,and±1.3 pm,and a wavelength resolution consistent with the theoretical value of 0.2×10-6.These findings validate the capa-bility of this miniaturized technology to perform high-precision,rapid measurements across the full 0.8-2.4 μm near-infrared spectrum.
wavelength measurementMichelson interferometernear-infraredultra-wide spectral range
万方数据
维普
