Time-resolved spectral characterization of ring cavity surface emitting and ridge-type distributed feedback quantum cascade lasers by step-scan FT-IR spectroscopy

Brandstetter, Markus; Genner, Andreas; Schwarzer, Clemens; Mujagić, E.; Strasser, G.; Lendl, Bernhard

doi:10.1364/oe.22.002656

Cited by 23 publications

(20 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To address the specific molecular resonances, two or more laser waveguide detector units on the same chip with different distributed feedback gratings on the lasers can be fabricated30, circumventing beam combining issues. A continuous spectral coverage can be obtained by intrapulse wavelength tuning due to device heating31. Although not required for fluidic sensing because of the relatively broad absorption features, the fast response of the on-chip detector is beneficial to achieve a high spectral resolution.…”

Section: Resultsmentioning

confidence: 99%

Monolithically integrated mid-infrared lab-on-a-chip using plasmonics and quantum cascade structures

et al. 2014

Self Cite

View full text Add to dashboard Cite

The increasing demand of rapid sensing and diagnosis in remote areas requires the development of compact and cost-effective mid-infrared sensing devices. So far, all miniaturization concepts have been demonstrated with discrete optical components. Here we present a monolithically integrated sensor based on mid-infrared absorption spectroscopy. A bi-functional quantum cascade laser/detector is used, where, by changing the applied bias, the device switches between laser and detector operation. The interaction with chemicals in a liquid is resolved via a dielectric-loaded surface plasmon polariton waveguide. The thin dielectric layer enhances the confinement and enables efficient end-fire coupling from and to the laser and detector. The unamplified detector signal shows a slope of 1.8–7 μV per p.p.m., which demonstrates the capability to reach p.p.m. accuracy over a wide range of concentrations (0–60%). Without any hybrid integration or subwavelength patterning, our approach allows a straightforward and cost-saving fabrication.

show abstract

Section: Resultsmentioning

confidence: 99%

Monolithically integrated mid-infrared lab-on-a-chip using plasmonics and quantum cascade structures

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…The comb of modes develops and evolves during the pulse duration. [20]. For the QCL operated at τ=200ns wavelength shift Δλ=5.44nm (0.619cm -1 ) was registered.…”

Section: Influence Of Operating Conditions -Low Duty Cycle Regimementioning

confidence: 99%

Time resolved FTIR study of spectral tuning and thermal dynamics of mid-IR QCLs

et al. 2014

View full text Add to dashboard Cite

The aim of this paper is to address some of the aspects of thermal management of QCLs. Results include electrical and spectral characterization of the devices. Results show shift of QCL emission mode towards lower wavenumbers during the pulse. Characteristics were registered at different temperatures of operation and driving conditions. Registered shift rates depend on operating temperature, being the highest at room temperature. Based on spectral tuning results, temperature increase rates for different modes of operations were evaluated, delivering information on thermal dynamics of investigated devices.

show abstract

“…15 Single-mode emission and continuous-wave operation at room temperature 16,17 in combination with the collimated emission beam make ring QCLs suitable tools for chemical sensing applications. 18,19 Due to their compact size and small footprint, these lasers are ideal light sources for the application in miniaturized sensing setups, such as substrate-integrated hollow waveguides. 20 2 Surface Emitting/Detecting On-Chip Sensor Typical state-of-the-art applications make use of conventional sensing setups, which include a light source, a lightanalyte interaction region, and an external separate detector, e.g., based on the mercury-cadmium-telluride (MCT) material system.…”

Section: Introductionmentioning

confidence: 99%

Surface emitting ring quantum cascade lasers for chemical sensing

et al. 2017

Self Cite

View full text Add to dashboard Cite

Abstract. We review recent advances in chemical sensing applications based on surface emitting ring quantum cascade lasers (QCLs). Such lasers can be implemented in monolithically integrated on-chip laser/detector devices forming compact gas sensors, which are based on direct absorption spectroscopy according to the Beer-Lambert law. Furthermore, we present experimental results on radio frequency modulation up to 150 MHz of surface emitting ring QCLs. This technique provides detailed insight into the modulation characteristics of such lasers. The gained knowledge facilitates the utilization of ring QCLs in combination with spectroscopic techniques, such as heterodyne phase-sensitive dispersion spectroscopy for gas detection and analysis.

show abstract

Time-resolved spectral characterization of ring cavity surface emitting and ridge-type distributed feedback quantum cascade lasers by step-scan FT-IR spectroscopy

Cited by 23 publications

References 22 publications

Monolithically integrated mid-infrared lab-on-a-chip using plasmonics and quantum cascade structures

Monolithically integrated mid-infrared lab-on-a-chip using plasmonics and quantum cascade structures

Time resolved FTIR study of spectral tuning and thermal dynamics of mid-IR QCLs

Surface emitting ring quantum cascade lasers for chemical sensing

Contact Info

Product

Resources

About