Title :
Infra-red light modulator of ridge-type optical waveguide structure using effect of free-carrier absorption
Author :
Kaneda, Shigeru ; Fujisawa, Yohei ; Kikuiri, K.
Author_Institution :
Technological University of Nagaoka, Faculty of Engineering, Department of Electronics, Nagaoka, Japan
Abstract :
An experimental study of optical modulation of 10.6 ¿m infra-red CO2 laser light using the effect of free-carrier absorption is performed. The modulator has a ridge-type optical waveguide structure having the electrodes for the carrier injection. In this modulating electrode, the tunnel MIS structure is used because it can effectively inject the minority carrier. It becomes clear that a fairly high degree of modulation up to 62% can be realised by such a structure.
Keywords :
electro-optical devices; gas lasers; laser accessories; metal-insulator-semiconductor structures; optical modulation; optical waveguides; CO2 laser; IR optical modulator; carrier injection; free carrier absorption effect; minority carrier; ridge-type optical waveguide; tunnel MIS structure;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19860629
