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Operation of low driving voltage cascaded modulator over non-cascaded modulator for 4 dB extinction ratio at 100 giga bit per second (Gbps)
KTH, School of Information and Communication Technology (ICT). Hanyang University, South Korea .
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Optics and Photonics, OFO.ORCID iD: 0000-0001-7056-4379
2014 (English)In: Optik (Stuttgart), ISSN 0030-4026, E-ISSN 1618-1336, Vol. 125, no 22, 6761-6764 p.Article in journal (Refereed) Published
Abstract [en]

This paper describes improved results when comparing cascaded traveling wave electro absorption modulator (TWEAM) to non-cascaded TWEAM by simulation. Large signal modeling is used for both types of modulators to achieve 4 and 10 dB extinction ratios (ERs) with flat frequency response for applications in short distance as well as long distance optical fiber communication. To obtain 4 and 10 dB ERs with 110 GHz 3 dB bandwidth, a cascaded TWEAM requires 0.4V peak to peak (Vp-p) and 1 Vp-p input driving voltages respectively. A non-cascaded TWEAM requires about two times the input driving voltage compared to the cascaded modulator to achieve the same values of ER and 3 dB bandwidth. Both modulators have been simulated with the same bias and also use the same circuit parameters except for the total active segment lengths (1 and 0.5 mm for cascaded and non-cascaded modulator respectively) and microstrip lengths to obtain the same ERs and 3 dB bandwidths.

Place, publisher, year, edition, pages
2014. Vol. 125, no 22, 6761-6764 p.
Keyword [en]
TWEAM, Cascaded modulator, 100 Gbps
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Other Physics Topics
URN: urn:nbn:se:kth:diva-157579DOI: 10.1016/j.ijleo.2014.07.095ISI: 000344976300032ScopusID: 2-s2.0-84910002126OAI: diva2:771210

QC 20141212

Available from: 2014-12-12 Created: 2014-12-11 Last updated: 2014-12-12Bibliographically approved

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Islam, A. B. M. HamidulWestergren, Urban
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