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Applying light-emitting diodes with narrowband emission features in differential spectroscopy

机译:具有窄带发射特性的发光二极管在差分光谱中的应用

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摘要

LEDs are a promising new type of light source for differential optical absorption spectroscopy (DOAS). Varying differential structures in the emission spectrum of LEDs, however, display a potentially severe problem. We show that the structures, which originate from a Fabry-Perot etalon, may be removed by tilting the emitter, which at the same time increases the radiant flux coupled into the subsequent optical system. The results of long-path DOAS measurements, where we apply our method on a blue LED for the suppression of periodic structures, are also presented.
机译:LED是用于差分光学吸收光谱法(DOAS)的有前途的新型光源。但是,LED的发射光谱中的不同结构存在潜在的严重问题。我们表明,可以通过倾斜发射器来去除源自Fabry-Perot标准具的结构,这同时会增加耦合到后续光学系统中的辐射通量。还介绍了长途DOAS测量的结果,在该结果中,我们将我们的方法应用于蓝色LED上以抑制周期性结构。

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