Microsensors Based on Quantum Cascade Lasers
نویسندگان
چکیده
ABSTRACT We present our results on efficient coupling of Quantum Cascade Lasers (QCLs) into Whispering Gallery Resonators, Hollow Waveguide. We also present results of micro sensors using the unique properties of QCLs, e.g. online sensors for Gas Chromatography (GC). We show that because of the unique brightness properties of QCLs, we could improve GC-Infrared sensors' sensitivity to the same level as Mass Spectrometry, and with different dimension of chemical information.
منابع مشابه
Temperature Effect on THz Quantum Cascade Lasers
A simple semi-phenomenological model, which accurately predicts the dependence of thresholdcurrent for temperature of Resonant-phonon three well quantum cascade laser based on verticaltransitions is offered. We found that, the longitude optical phonon scattering of thermally excitedelectrons is the most important limiting factor for thermal performance of high frequency THz QCLs.In low frequenc...
متن کاملDesign Optimization for 4.1-THZ Quantum Cascade Lasers
We present an optimized design for GaAs/AlGaAs quantum cascade lasers operating at 4.1THz. This was based on a three-well active module with diagonal radiative transition. This was performed by modifying the existing model structure, to reduce the parasitic anticrossings (leakage currents) as well as the optical gain linewidth. While the gain FWHM was reduced by more than 50% the gain pea...
متن کاملModulation Response and Relative Intensity Noise Spectra in Quantum Cascade Lasers
Static properties, relatively intensity noise and intensity modulation response in quantum cascade lasers (QCLs) studied theoretically in this paper. The present rate equations model consists of three equations for the electrons density in the conduction band and one equation for photons density in cavity length. Two equations were derived to calculate the noise and modulation response. Calcula...
متن کاملWidely tunable terahertz source based on intra-cavity frequency mixing in quantum cascade laser arrays
Articles you may be interested in InAs/AlSb widely tunable external cavity quantum cascade laser around 3.2 μm Room temperature single-mode terahertz sources based on intracavity difference-frequency generation in quantum cascade lasers Appl. Terahertz sources based on intracavity frequency mixing in mid-infrared quantum cascade lasers with passive nonlinear sections Appl. Surface-emitting tera...
متن کاملTerahertz generation in mid-infrared quantum cascade lasers with a dual-upper-state active region
Articles you may be interested in Distributed feedback terahertz frequency quantum cascade lasers with dual periodicity gratings Appl. Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes Appl. High order sideband generation in terahertz quantum cascade lasers Appl. High frequency modulation of mid-infrared quantum cascade...
متن کامل