Hollow waveguide photomixing for quantum cascade laser heterodyne spectro-radiometry.
Hollow waveguide photomixing for quantum cascade laser heterodyne spectro-radiometry.
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DOI：
10.1364/oe.19.009074
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发表时间：
2011-05
期刊：
影响因子：
3.8
通讯作者：
D. Weidmann;B. Perrett;N. Macleod;R. Jenkins
中科院分区：
文献类型：
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作者：
D. Weidmann;B. Perrett;N. Macleod;R. Jenkins
本文提出了一种利用空心波导的集成光学方法，设计了一种紧凑、坚固、高效的中红外外差光混频电路。该方法涉及在玻璃陶瓷基板中创建用于光束组合器部件的中空波导和对准特征。集成光束组合器的性能作为全激光外差光谱辐射计的一部分进行了测试，其中发射波长为9.7 µm的量子级联激光本机振荡器与非相干辐射混合。的性能进行了评估与低温冷却和珀耳帖冷却的光混色器证明一致的检测限的两个和五倍的散粒噪声限制，分别。中空波导混频器还显示出在时间稳定性、激光空间模式净化和对光反馈的灵敏度降低方面的优点。
An integrated optic approach, using hollow waveguides, has been evaluated for a compact, rugged, high efficiency heterodyne optical mixing circuit in the middle infrared. The approach has involved the creation of hollow waveguides and alignment features for a beam combiner component in a glass-ceramic substrate. The performance of the integrated beam combiner was tested as part of a full laser heterodyne spectro-radiometer in which a quantum cascade laser local oscillator emitting at 9.7 µm was mixed with incoherent radiation. The performance has been evaluated with both cryogenically-cooled and peltier-cooled photomixers demonstrating consistent detection limits of two and five times the shot noise limit, respectively. The hollow waveguide mixer has also shown advantages in temporal stability, laser spatial mode cleansing, and reduced sensitivity to optical feedback.