Abstract

drive voltage to a 320 j.tm long waveguide.On-state attenuation is only 3 dB.1. INTRODUCTIONElectro-absorption effects in multiple quantum well structures' named as quantum-confinedStark effect (QCSE) have attracted much attention because of a wide variety of potential applicationslight modulator arrays, self electro-optic devices (SEEDs), waveguide modulators and more. The majoradvantage of the QCSE is that it provides absorption variations up to one order of magnitude higher thanthe Franz Keldysh effect under application of similar electric fields1'2. Its major drawback is that it is aquadratic phenomenon3 which implies that it cannot operate with low electric fields. Electro-absorption

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