研制了一种小型化宽调谐光纤型DFG/QPM中红外光源.该光源的基频光采用分段调谐的方案,以3个不同工作波段的YDFL作为泵浦源,3个不同工作波段的EDFL作为信号源,并通过光开关实现各波段间的快速切换.研制了DFG中红外光源样机,其尺寸为440mmx290mmx500mm,测试结果表明,泵浦光/信号光可在1050～1110nm和1535～1600nm范围内宽带连续调谐,经差频过程最终中红外激光实现3054.5～4009.1nm波段内宽带无缝调谐.
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