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Showing 1 to 9 of 9 for “"Gain Compression"”.
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Controlling Semiconductor Optical Amplifiers for Robust Integrated Photonic Signal Processing
… a core photonic model, a photonic model with gain compression, and a equivalent circuit optoelectronic model. We validate each model and calibrate the gain compression model by pump/probe experiments. We then linearize the state-space models to design and analyze SOA controllers. We apply each …
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Techniques for high-speed direct modulation of quantum dot lasers
… active region in single-section QD lasers, the gain-lever effect in two-section lasers and the injection-locking technique. Firstly, the modulation performances of p-doped InAs/GaAs QD lasers were studied. Contrary to the theoretical predictions, the modulation efficiency and the highest …
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Analog adaptive nonlinear filtering and spectral analysis for low-power audio applications
… jump resonance. Unlike harmonic distortion and gain compression which slowly increase with the input amplitude, jump resonance is not present in a linear system, but develops in the presence of strong nonlinearity.
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Study of carrier and gain dynamics in InGaAsN quantum well lasers
… of the carrier recombination dynamics, nonlinear gain dynamics and carrier capture and escape processes in InGaAsN quantum well lasers. The carrier dynamics is investigated through a comprehensive temperature dependent steady state photoluminescence (PL) and time evolution of PL spectra. The gain …
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Design and analysis of pattern null reconfigurable antennas
… that reconfigurable antennas may suffer from gain compression and exhibit nonreciprocity, setting the stage for additional research to mitigate these effects.
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Characterization of the Dynamics of Optically-Injected Nanostructure Lasers
… of their characteristically large nonlinear gain component. The impact of the large degree of gain compression on the differential and nonlinear carrier relaxation rates observed in nanostructure lasers under large operational photon densities is also investigated under strong …
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Broadband and Energy-Efficient Power Amplifier Architectures
… proposed biasing scheme, a controlled amount of gain expansion can be achieved. The gain expansion can be used to compensate for the gain compression of the conventional power amplifiers to improve the amplifier's linearity without the need for additional linearizing circuitry or digital …
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Design of Class-E Radio Frequency Power Amplifier
… S-parameters was investigated, where compression in the power gain was used as an indicator for design accuracy. The effect of drain voltage variation on the power gain compression has been studied in this research. The class-E amplifier has a maximum theoretical efficiency of 100%. It …
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Dynamic range characterization of indium-phosphide double-heterojunction bipolar transistors for ultralinear sub-millimeter wave applications
Dynamic range characterization of double-heterojunction bipolar transistors is examined. The measurement procedures are detailed, along with a novel procedure for calibrating load-pull measurements using all on-chip calibration standards. The use of all on-chip calibration standards can reduce …