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This paper presents and discusses recent achievements in the realization of a miniaturized optical sensor based on photoacoustic detection and it illustrates the potential of the co-integration of Si-based Photonic Integrated Circuits, IC/MEMS and QCL technologies
We report on the realization of buried single ridge and μ-stripes quantum cascade lasers using HVPE and MOVPE regrowth steps of semi-insulating InP:Fe and Si doped layers. We present here the preliminary results obtained on these devices. The reduction of the thermal resistance achieved using semi-insulating InP:Fe for regrowth planarization and μ-stripe arrays approaches are shown and performance...
For optical countermeasures application, the efficiency of the sources, the beam quality and the power are the crucial points. In the field of quantum cascade lasers, those three parameters give trade off values on the geometry of the laser limiting seriously the capability of the technology. For instance, one has to use ridges with width below 8μm to have a M2 suitable for DIRCM application. It limits...
We present the realizations of an array of Distributed Feedback (DFB) lasers and passive optical waveguides based on Silicon. The aim of these preliminary results is to realize a monolithic, widely tuneable, source in the mid-Infrared (mIR) for laser spectroscopy.
We report on the first application of Optical Feedback-Cavity Enhanced Absorption Spectroscopy to formaldehyde trace gas analysis at mid-infrared wavelengths. A continuous-wave room-temperature, distributed-feedback quantum cascade laser emitting around 1,769 cm−1 has been successfully coupled to an optical cavity with finesse 10,000 in an OF-CEAS spectrometer operating on the ν2 fundamental absorption...
Low beam divergence (2.1°*4°) substrate emission from a quantum cascade laser is demonstrated with top metal grating at room temperature. An index coupled, distributed feedback laser with a SMSR of 30dB is coupled to a monolithic extraction area.
We report on the realization of both Distributed Feedback (DFB) and Fabry-Pérot (FP) Quantum Cascade Lasers (QCLs) at Alcatel Thales III-V Lab, involving MOVPE regrowth steps for the realization of the upper cladding and buried ridge structures. We present our results on both device types. Optimization of the planarization process as well as reduction of the thermal resistance achieved using semi-insulating...
New design rules allow room temperature continuous wave operation distributed feedback quantum cascade lasers using top metal gratings. Lasing between 4.5 and 7.5 mum and above 20 mW is achieved.
We report design of specific grating profile to perform substrate emission of metal grating Distributed Feedback Quantum Cascade Lasers. We achieve room temperature operation around 5.6 mum.
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