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Type-I interband laser diodes were developed for trace gas sensing applications in the 2–4um wavelength range. The devices were grown by molecular beam epitaxy on GaSb substrates using InGaAsSb/Al(In)GaAsSb active regions. Tunable, single-mode lasers were produced using distributed feedback grating processing or by incorporating Fabry-Perot lasers in an external cavity configuration. Sensitive gas...
Large antenna arrays are very costly and, in particular in the case of shipborne platforms, array dimensions are limited. In order to overcome these constraints for the naval application of a High-Frequency Surface Wave Radar (HF SWR) we propose to make use of multiple ships sailing together within a naval formation. This distributed array will be sparse and we apply the concept of effective aperture...
<para> High-resolution spectroscopy was used to examine gain characteristics of Cr-grating complex-coupled distributed-feedback (DFB) lasers near 2.4 m. The single-mode lasers contain InGaAsSb–AlGaAsSb active regions grown by molecular beam epitaxy on GaSb. Modal gain was extracted from the measured amplified spontaneous emission spectra and compared with reference Fabry–PÉrot lasers. The...
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