Publications by authors named "Hirotake Fukuoka"
A 2 μm Ho-doped ytrrium lithium fluoride (Ho:YLF) laser end-pumped by a 1.94 μm Tm:fiber laser was developed. A laser system of a ring resonator oscillator and amplifier was operated at repetition rates of 200-5000 Hz at room temperature.
View Article and Find Full Text PDFQ-switched operation of a diode-side-pumped, conduction-cooled Tm,Ho:YLF laser oscillator with 100-mJ output at a pulse repetition rate of 20 Hz and an eye-safe wavelength of 2-μm was achieved. The noncomposite Tm,Ho:YLF laser rod was conduction-cooled down to -80°C through thermal contact of In films from Cu heat sinks, and the laser diode arrays were conduction-cooled to approximately 20°C using Cu heat sinks in a vacuum container. A ring resonator of 3.
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- The Co2DiaWiL is a specialized lidar system designed to simultaneously measure carbon dioxide (CO2) concentration and wind speed.
- It uses a cooled laser setup, with the pumping laser head operating at -80°C and diode arrays at around 20°C, generating 80 mJ output pulses at up to 30 Hz frequency.
- The system achieved 0.7% precision in CO2 measurements over a distance of up to nearly 2 kilometers and successfully measured wind speeds from distances as far as 20 kilometers, including a mountainous area 24 kilometers away.