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您的检索式：作者名="OLIVIER SPITZ"
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| 1 | Extreme events in quantum cascade lasers显示文摘We demonstrate experimentally that mid-infrared quantum cascade lasers(QCLs)operating under external optical feedback exhibit extreme pulses.These events can be triggered by adding small amplitude periodic modulation,with the highest success rate for the case of a pulse-up excitation.These findings broaden the potential applications for QCLs,which have already been proven to be a semiconductor laser of interest for spectroscopic applications and countermeasure systems.The ability to trigger extreme events paves the way for optical neuron-like systems where information propagates as a result of high intensity bursts. | Olivier Spitz Jiagui Wu Andreas Herdt Grégory Maisons Mathieu Carras Wolfgang Elsäßer Chee-Wei Wong Frédéric Grillot | 2020 | Advanced Photonics2020，2，6： | 1 |
| 2 | Interband cascade technology for energy-efficient mid-infrared free-space communication显示文摘Space-to-ground high-speed transmission is of utmost importance for the development of a worldwide broadband network.Mid-infrared wavelengths offer numerous advantages for building such a system,spanning from low atmospheric attenuation to eye-safe operation and resistance to inclement weather conditions.We demonstrate a full interband cascade system for high-speed transmission around a wavelength of 4.18μm.The low-power consumption of both the laser and the detector in combination with a large modulation bandwidth and sufficient output power makes this technology ideal for a free-space optical communication application.Our proof-of-concept experiment employs a radio-frequency optimized Fabry–Perot interband cascade laser and an interband cascade infrared photodetector based on a type-II InAs/GaSb superlattice.The bandwidth of the system is evaluated to be around 1.5 GHz.It allows us to achieve data rates of 12 Gbit/s with an on–off keying scheme and 14 Gbit/s with a 4-level pulse amplitude modulation scheme.The quality of the transmission is enhanced by conventional pre-and post-processing in order to be compatible with standard error-code correction. | PIERRE DIDIER HEDWIG KNÖTIG OLIVIER SPITZ LAURENT CERUTTI ANNA LARDSCHNEIDER ELIE AWWAD DANIEL DIAZ-THOMAS ANBARANOV ROBERT WEIH JOHANNES KOETH BENEDIKT SCHWARZ FRÉDÉRIC GRILLOT | 2023 | Photonics Research2023，11，4： | 0 |
| 3 | High-capacity free-space optical link in the midinfrared thermal atmospheric windows using unipolar quantum devices显示文摘Free-space optical communication is a very promising alternative to fiber communication systems,in terms of ease of deployment and costs.Midinfrared light has several features of utter relevance for free-space applications:low absorption when propagating in the atmosphere even under adverse conditions,robustness of the wavefront during long-distance propagation,and absence of regulations and restrictions for this range of wavelengths.A proof-of-concept of high-speed transmission taking advantage of intersubband devices has recently been demonstrated,but this effort was limited by the short-distance optical path(up to 1 m).In this work,we study the possibility of building a long-range link using unipolar quantum optoelectronics.Two different detectors are used:an uncooled quantum cascade detector and a nitrogen-cooled quantum well-infrared photodetector.We evaluate the maximum data rate of our link in a back-to-back configuration before adding a Herriott cell to increase the length of the light path up to 31 m.By using pulse shaping,pre-and post-processing,we reach a record bitrate of 30 Gbit s−1 for both two-level(OOK)and four-level(PAM-4)modulation schemes for a 31-m propagation link and a bit error rate compatible with error-correction codes. | Pierre Didier Hamza Dely Thomas Bonazzi Olivier Spitz Elie Awwad Étienne Rodriguez Angela Vasanelli Carlo Sirtori Frédéric Grillot | 2022 | Advanced Photonics2022，4，5： | 0 |
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