Title :
Guided-wave intensity modulators using amplitude-and-phase perturbations
Author :
Soref, Richard A. ; McDaniel, Donald L., Jr. ; Bennett, Brian R.
Author_Institution :
Rome Air Dev. Center, Hanscom AFB, MA, USA
fDate :
3/1/1988 12:00:00 AM
Abstract :
A theoretical analysis of intensity modulation in coupled waveguides and Mach-Zehnder interferometers is reported. Simultaneous phase and amplitude perturbations Δn+ιΔk are considered. Predictions are made about the performance of electrooptic GaAs and InP modulators controlled by the free-carrier effect (ΔN) or by the Franz-Keldysh effect (ΔE ). The phase-dominant condition Δn>5Δk is optimal. The predicted depth of modulation is greater than that of conventional loss-modulators over a range of ΔN or ΔE
Keywords :
electro-optical devices; light interferometers; optical couplers; optical modulation; optical waveguides; Franz-Keldysh effect; InP modulators; Mach-Zehnder interferometers; amplitude-and-phase perturbations; coupled waveguides; electrooptic GaAs modulators; free-carrier effect; guided-wave intensity modulators; intensity modulation; loss-modulators; Amplitude modulation; Intensity modulation; Optical attenuators; Optical interferometry; Optical losses; Optical modulation; Optical refraction; Optical resonators; Optical variables control; Optical waveguides;
Journal_Title :
Lightwave Technology, Journal of
