Mid-infrared tunable quantum cascade lasers for gas-sensing applications
| Autor: | Albert L. Hutchinson, R. Kohler, Alessandro Tredicucci, James N. Baillargeon, Federico Capasso, Claire F. Gmachl, Deborah L. Sivco, A.Y. Cho |
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| Rok vydání: | 2000 |
| Předmět: |
Distributed feedback laser
Materials science business.industry Physics::Optics Laser pumping Laser Electronic Optical and Magnetic Materials law.invention Semiconductor laser theory Quantum dot laser law Optoelectronics Semiconductor optical gain Electrical and Electronic Engineering business Instrumentation Quantum well Tunable laser |
| Zdroj: | IEEE Circuits and Devices Magazine. 16:10-18 |
| ISSN: | 8755-3996 |
| Popis: | The quantum cascade (QC) laser does not involve the material bandgap for the generation of light. Therefore, InP- and GaAs-based III-V semiconductor materials can now be used for the generation of long-wavelength, mid-infrared light. These materials are also straightforward to process and pattern. This is essential for the more sophisticated device geometries such as distributed feedback (DFB) lasers. DFB lasers provide a very elegant and reliable method to achieve a well-defined single-wavelength emission (called single-mode operation) as opposed to the usually multiple-mode emission of free-running Fabry-Perot resonators. QC-DFB lasers were first demonstrated in 1996. They have evolved very rapidly and have already shown great promise in many different gas-sensing applications. |
| Databáze: | OpenAIRE |
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