Broadly tunable laser-diode-based mid-infrared source with up to 31 μW of power at 4.3-μm wavelength
Broadly tunable laser-diode-based mid-infrared source with up to 31 μW of power at 4.3-μm wavelength
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基于激光二极管的广泛可调中红外光源，在 4.3 μm 波长下功率高达 31 μW
DOI：
10.1364/ol.21.000952
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发表时间：
1996
期刊：
影响因子：
3.6
通讯作者：
D. Welch
中科院分区：
文献类型：
--
作者：
A. Balakrishnan;S. Sanders;S. Demars;J. Webjorn;D. Nam;R. Lang;D. Mehuys;R. Waarts;D. Welch
高功率单空间模式近红外激光二极管混合在周期性极化的LiNbO3 （PPLN）中，产生宽可调谐的中红外辐射。结果表明，该激光器在中红外波段的转换效率可达0.017%/W，在光谱上重要的4.3 μm波长可产生31 μW的功率。我们通过将波长可调激光二极管泵浦源与固定波长的主振荡器功率放大器激光二极管信号源混合在PPLN样品中，实现了宽带中红外可调谐性，该样品的极化周期在光束传播方向的横向变化范围为21.0 ~ 22.6 μm。我们利用样品22.0 μm的固定周期区域，用这些激光源产生4.1 ~ 4.3 μm的中红外辐射。
High-power single-spatial-mode near-IR laser diodes are mixed in periodically poled LiNbO3 (PPLN) to generate broadly tunable mid IR-radiation. Conversion efficiencies to the mid IR up to 0.017%/W are demonstrated, and up to 31 μW of power is generated at the spectroscopically important 4.3-μm wavelength. We achieved broadband mid-IR tunability by mixing a wavelength-tunable laser-diode pump source with a fixed-wavelength master oscillator power amplifier laser-diode signal source in a PPLN sample that has a poling period that varies from 21.0 to 22.6 μm in the direction transverse to the beam propagation. We generated mid-IR radiation from 4.1 to 4.3 μm with these laser sources, using a fixed 22.0-μm period region of the sample.