Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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
A Modulating retro-reflector for free-space optical communication
Industrial Nano- and Micro-technologies Department, Kista.
Industrial Nano- and Micro-technologies Department, Kista.
Industrial Nano- and Micro-technologies Department, Kista.
Industrial Nano- and Micro-technologies Department, Kista.
Show others and affiliations
2006 (English)In: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 18, no 1, 85-87 p.Article in journal (Refereed) Published
Abstract [en]

We present modeling of a modulating retro-reflector for free-space optical communication, composed of a reflective resonant-cavity modulator and a corner cube. Although resonant-cavity modulators are sensitive to the angle of incidence of the light beam, we show that with the right geometrical arrangement, the field of view can be more than ten-fold that of the modulator. The modeling is validated by experimental data using a corner cube and a 14 x 14 mm(2) multiple quantum-well modulator.

Place, publisher, year, edition, pages
2006. Vol. 18, no 1, 85-87 p.
Keyword [en]
Modulation; Optical communication; Quantum-well devices
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-7629DOI: 10.1109/LPT.2005.860388ISI: 000235899300028OAI: oai:DiVA.org:kth-7629DiVA: diva2:12714
Note
QC 20100802Available from: 2007-11-12 Created: 2007-11-12 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Surface-normal multiple quantum well electroabsorption modulators: for optical signal processing and asymmetric free-space communication
Open this publication in new window or tab >>Surface-normal multiple quantum well electroabsorption modulators: for optical signal processing and asymmetric free-space communication
2007 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

Electroabsorption is the physical phenomenon by which the absorption of light in a medium can be controlled by applying an electric field. The Quantum–Confined Stark Effect, which makes the absorption band–edge in quantum wells very field–dependent, together with the strong absorption peak provided by excitons, are the physical foundations for the success of electroabsorption modulators based on quantum well structures in telecommunication networks.

This thesis describes the design and fabrication of surface–normal electroabsorption modulation devices. The techniques needed to understand the design and fabrication of surface–normal multiple quantum well optical modulators are introduced, as are the various characterisation techniques used during and after the fabrication.

Devices for several types of applications have been designed, fabricated, characterised and in some cases integrated into optical systems:

– Two–dimensional arrays of 128´128 pixel amplitude modulators grown on GaAs substrates have been fabricated and characterised. Speeds of up to 11700 frames per second were demonstrated, limited by the output electronics of the computer interface.

– Large–area modulators grown on GaAs substrates for free–space optical communication were developed, with an active area of 2cm2 and a modulation speed of several megahertz. Contrast ratios up to 5:1 on full modulator areas were measured. Problems limiting the yield and modulation speed of such devices have been studied, and solutions to overcome them have been demonstrated.

– Large–area devices grown on InP substrates for free–space optical communication have been developed. Contrast ratios of up to 2:1 for transmissive types have been demonstrated.

– Devices consisting of two rows of pixels, grown on GaAs substrates, with an active area of 22mm´5mm, divided into 64 or 128 pixels per row have been developed. These amplitude modulation devices were designed for optical signal processing applications.

– One variant of these optical signal processing devices was also characterised as a ternary, binary amplitude and binary phase modulator array.

– The use of GaAs multiple quantum well optical modulators in a free–space optical retro–communication system has been studied. An opto–mechanical design for a modulating retro–reflector is described, allowing a large field of view in one direction using reflecting, resonant–cavity modulators for high contrast ratios.

Place, publisher, year, edition, pages
Stockholm: KTH, 2007. xxviii, 90 p.
Series
Trita-ICT/MAP, 2007:8
Keyword
spatial light modulators, quantum wells, optical resonator, Fabry–Pérot cavity, electroabsorption modulator, free–space optical communication
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-4532 (URN)
Public defence
2007-11-30, Sal N1, KTH-Electrum 3, Isafjordsgatan 28 a/D, Kista, 10:00
Opponent
Supervisors
Note
QC 20100802Available from: 2007-11-12 Created: 2007-11-12 Last updated: 2010-08-02Bibliographically approved
2. Surface-normal multiple quantum well electroabsorption modulators based on GaAs-related materials
Open this publication in new window or tab >>Surface-normal multiple quantum well electroabsorption modulators based on GaAs-related materials
2005 (English)Licentiate thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 2005. xx, 66 p.
Series
Trita-MVT, ISSN 0348-4467 ; 2005:1
Keyword
Mathematical optimization, systems theory, spatial light modulators, quantum wells, optical resonator, Fabry-Pérot, Optimeringslära, systemteori
National Category
Computational Mathematics
Identifiers
urn:nbn:se:kth:diva-292 (URN)
Presentation
2005-02-22, Sal C1, KTH-Electrum, Kista, 10:00
Note
QC 20101206Available from: 2005-07-11 Created: 2005-07-11 Last updated: 2010-12-06Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textIEEE Xplore

Search in DiVA

By author/editor
Junique, StephaneÅgren, DanielNoharet, BertrandAndersson, Jan Y.
In the same journal
IEEE Photonics Technology Letters
Telecommunications

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 109 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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