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Segmented transmission-line electroabsorption modulators

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5 Author(s)
Lewen, R. ; Lab. of Opt., R. Inst. of Technol., Kista, Sweden ; Irmscher, S. ; Westergren, U. ; Thylen, L.
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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.

Published in:

Lightwave Technology, Journal of  (Volume:22 ,  Issue: 1 )

Date of Publication:

Jan. 2004

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