Publication

Phase Modulation in Ingaasp Barrier, Reservoir, and Quantum-Well Electron-Transfer Structures, Grown by Chemical Beam Epitaxy

Jean-François Carlin, Alok Rudra, Marc-André Dupertuis
1994
Journal Articles

Abstract

We have measured phase modulation in the first chemical beam epitaxy grown InGaAsP/InP barrier, reservoir, and quantum well electron transfer structures. We obtain a negative refractive index change, DELTAn, similar to that found in the InGaAs/InAlAs system. Using new designs to reduce the leakage current in this material system, we obtain a leakage current

Official source

https://infoscience.epfl.ch/entities/publication/1d70b001-3b38-48c5-907b-c4e30449af51

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Jean-François Carlin, Alok Rudra, Marc-André Dupertuis
1994
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/1d70b001-3b38-48c5-907b-c4e30449af51

About this result

Related concepts (32)

Frequency modulation

Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The technology is used in telecommunications, radio broadcasting, signal processing, and computing. In analog frequency modulation, such as radio broadcasting, of an audio signal representing voice or music, the instantaneous frequency deviation, i.e. the difference between the frequency of the carrier and its center frequency, has a functional relation to the modulating signal amplitude.

Phase-shift keying

Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency carrier wave. The modulation is accomplished by varying the sine and cosine inputs at a precise time. It is widely used for wireless LANs, RFID and Bluetooth communication. Any digital modulation scheme uses a finite number of distinct signals to represent digital data. PSK uses a finite number of phases, each assigned a unique pattern of binary digits.

Phase modulation

Phase modulation (PM) is a modulation pattern for conditioning communication signals for transmission. It encodes a message signal as variations in the instantaneous phase of a carrier wave. Phase modulation is one of the two principal forms of angle modulation, together with frequency modulation. In phase modulation, the instantaneous amplitude of the baseband signal modifies the phase of the carrier signal keeping its amplitude and frequency constant.