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The development of a widely tunable coherent mid-infrared optical source，which can be used for various types of trace-gas sensing, is reported．This source utilizes difference frequency generation (DFG...) in a periodica11y poled LiNbO3（PPLN）crystal pumped by two single-frequency diode lasers. Wide range tunable output in the range 3.7 to 4.8 μm is achieved by tuning one of the diode laser and altering the temperature of the single-period PPLN．Development of a fiber-coupled，tunable Cr3+:LiSrAlF6 1aser，which can be used for the DFG process is also described．In addition，preliminary studies regarding an application of the gas sensor for absorption measurements of ambient CO2 gas is reported．続きを見る
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Mendeley出力
