Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Simulation of Traveling Wave Electroabsorption Modulators Suitable for 100Gbps
KTH, School of Information and Communication Technology (ICT).
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The large signal model for electro-absorption modulators is studied and simulated. In the previous model, the effect of frequency chirp has not been included and also there is no phase information of the optical carrier.

This thesis focuses on introducing the phase information of the optical carrier by representing it as a time varying sinusoidal voltage as well as modeling frequency chirp in traveling wave electro-absorption modulators by using a voltage dependent transmission line delay. The transmission line is designed as periodic LC section, where all the capacitance values were modeled to have a quadratic dependence on the microwave voltage using the CBREAK model in PSPICE. This means that the transmission line delay will have a linear dependence on the voltage.

The whole modified model for the modulator is then simulated and the frequency chirp effect on the modulator performance was studied. It is shown that the frequency chirp broadens the modulator spectrum but it has no pronounced effect on the eye diagram. This means that long distance transmission will be mutilated due to dispersion.

By choosing a small absorption and large change in delay, the phase modulator is simulated and can be fabricated by using a three step quantum well because it has a large change in refractive index and small change in absorption. On the other hand, to fabricate an electro-absorption modulator a rectangular quantum well should be used.

Place, publisher, year, edition, pages
2011. , 42 p.
Series
Trita-ICT-EX, 2011:144
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-96942OAI: oai:DiVA.org:kth-96942DiVA: diva2:533304
Subject / course
Microelectronics and Applied Physics
Educational program
Master of Science - Photonics
Uppsok
Technology
Supervisors
Examiners
Available from: 2012-06-13 Created: 2012-06-13

Open Access in DiVA

fulltext(1558 kB)1302 downloads
File information
File name FULLTEXT01.pdfFile size 1558 kBChecksum SHA-512
368461ec13f3db05d9aa12df6fa277db0fbe77b7dbe87a29c050a46aded5b0c6eac03925920cbd92f023389211bb75ace5e1de47aa252ef0462feb1b5608f33c
Type fulltextMimetype application/pdf

By organisation
School of Information and Communication Technology (ICT)
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 1302 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 346 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf