Title :
Segmented transmission-line electroabsorption modulators
Author :
Lewén, Robert ; Irmscher, Stefan ; Westergren, Urban ; Thylén, Lars ; Eriksson, Urban
Author_Institution :
Lab. of Opt., R. Inst. of Technol., Kista, Sweden
Abstract :
We present segmented transmission-line (TML) electroabsorption modulators (EAMs) with characteristic impedance close to 50 Ω. The segmented TML approach allows us to design a traveling-wave EAM with 50 Ω impedance and very high bandwidth. The devices show low return loss (<-15 dB) and excellent frequency response up to 50 GHz, and exhibit a maximum model-extrapolated 3 dBe bandwidth (BW) of 90 GHz. An effective modeling tool based on Bloch-wave analysis is derived. Design considerations and TML properties for periodic TML-EAMs are discussed.
Keywords :
electric impedance; electro-optical modulation; electroabsorption; optical communication equipment; 50 Ωimpedance; 50 GHz; 50 ohm; 90 GHz; Bloch-wave analysis; frequency response; return loss; segmented TML; segmented transmission-line electroabsorption modulators; traveling-wave EAM; Bandwidth; Frequency; High speed optical techniques; Impedance; Nonlinear optics; Optical losses; Optical modulation; Optical scattering; Optical waveguides; Transmission lines;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2003.822829
