High Speed Measurements and Enhancement of QEPAS Sensitivity: Quartz Resonance Frequency Tracking

Tatenguem, Herve; Sacher, Andreas; Hoppe, Morten; Milde, Tobias; Sacher, Joachim

doi:10.1364/cleo_at.2019.ath3k.7

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-1 First Subsystem (A): Ecdl Setup In the Littman/metcalf Co...1

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“…The laser has an external current driver and is temperature controlled via a TEC module. [10]. Here, the laser beam is first collimated between the two prongs of the QTF via a lens.…”

Section: -1 First Subsystem (A): Ecdl Setup In the Littman/metcalf Co...mentioning

confidence: 99%

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QEPAS Spectroscopy with fully tunable IC-ECDL with high bandwidth for the MIR range

Tatenguem¹,

Hoppe²,

Aßmann³

et al. 2023

Photonic Instrumentation Engineering X

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To meet the requirements for multi-species gas analysis, Quartz-Enhanced Photo-Acoustic Spectroscopy (QEPAS) is used in combination with an IC-based External Cavity Laser system (IC-ECL). The laser system allows the coverage of a wavelength range of 285 nm with an output power of several mW. By integrating piezoelectric actuators as well as resonantly driven MEMS actuators, extremely high sampling rates can be achieved. In this work, results on the detection of multiple trace gases by sequential quasi-simultaneous measurements are presented. The requirements of multi-species detection, output power, tuning range and detection rate are met by our work.

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“…The laser has an external current driver and is temperature controlled via a TEC module. [10]. Here, the laser beam is first collimated between the two prongs of the QTF via a lens.…”

Section: -1 First Subsystem (A): Ecdl Setup In the Littman/metcalf Co...mentioning

confidence: 99%

“…Figure 6: Block diagram of the ECDL setup in the Littman/Metcalf configuration with TEC and current driver 4-2 Second subsystem (B): QEPAS setup A standard diagram of the basic configuration of a QEPAS is shown in Fig. 7[10]. Here, the laser beam is first collimated between the two prongs of the QTF via a lens.…”

mentioning

confidence: 99%