Title :
Polarization-Independent, High-Contrast InGaAsP/InGaAsP MQW Waveguide Modulator
Author :
Cacciatore, C. ; Campi, D. ; Coriasso, C. ; Neitzert, H.C. ; Rigo, C. ; Stano, A.
Author_Institution :
CSELT-Centro Studi e Laboratori Telecomunicazioni Via G. Reiss Romoli, 274, 10148 Torino, Italy
Abstract :
In this work we demonstrate the polarization-insensitive operation of a multiple-quantum well electroabsorption modulator based on unstrained InGaAsP/InGaAsP material. Very large and shallow quantum wells were grown and used to generate electroabsorptive behaviour which is due to the merging of two effects, precisely: the quantum confined Stark effect and the Franz-Keldysh effect. Within this scheme TE and TM polarizations behave similarly. High-efficiency performance is reported for wavelengths around 1.55 ¿m.
Keywords :
Indium gallium arsenide; Indium phosphide; Intensity modulation; Optical modulation; Optical waveguides; Photoconductivity; Polarization; Quantum well devices; Stark effect; Tellurium;
Conference_Titel :
Solid State Device Research Conference, 1994. ESSDERC '94. 24th European
Conference_Location :
Edinburgh, Scotland
