Innovative Substrate-Integrated Hollow Waveguide Coupled Attenuated Total Reflection Sensors for Quantum Cascade Laser Based Infrared Spectroscopy in Harsh Environments

被引：6

作者：

Teuber, Andrea ^{[1
]}

Stach, Robert ^{[2
]}

Haas, Julian ^{[2
]}

Mizaikoff, Boris ^{[1
,2
]}

机构：

[1] Ulm Univ, Inst Analyt & Bioanalyt Chem, Albert Einstein Allee 11, D-89081 Ulm, Germany

[2] Hahn Schickard, Ulm, Germany

来源：

APPLIED SPECTROSCOPY | 2022年 / 76卷 / 01期

关键词：

Attenuated total reflection; ATR; evanescent field; quantum cascade laser; QCL; Fourier transform infrared; FT-IR; sensor system; horizontal ATR; HATR; infrared spectroscopy; IR; infrared sensor; substrate-integrated hollow waveguide; IHWG; VOLATILE ORGANIC-COMPOUNDS; OIL-SPILL; CHLORINATED HYDROCARBONS; INTERNAL-REFLECTION; MIDINFRARED SENSOR; WATER; TOOL; SYSTEMS; SPECTRA; ONLINE;

D O I：

10.1177/00037028211064331

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

An innovative mid-infrared spectroscopic sensor system based on quantum cascade lasers has been developed. The system combines the versatility of substrate-integrated hollow waveguides (IHWGs) with the robustness of attenuated total reflection (ATR) crystals employed as internal reflection waveguides for evanescent field sensing. IHWGs are highly reflective metal structures that propagate infrared (IR) radiation and were used as light pipes for coupling radiation into the ATR waveguide. The combined IHWG-ATR device has been designed such that the utmost stability and robustness of the optical alignment were ensured. This novel assembly enables evanescent field absorption measurements at yet unprecedently harsh conditions, that is, high pressure and temperature. Combining these advantages, this innovative sensor assembly is perfectly suited for taking ATR spectroscopy into the field where the robustness of the assembly and optical alignment is essential.

引用

页码：132 / 140

页数：9

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