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Optical amplifier
KTH, School of Information and Communication Technology (ICT), Optics and Photonics (Closed 20120101), Optics (Closed 20120101).
Acreo AB.
2001 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

For setting the optical gain of an optical amplifier such as a Raman amplifier that is connected in a wavelength division multiplexing (WDM) system, the gain of the amplifier is made dependent on the states of optical polarizers connected to individual inputs of a WDM multiplexer. The polarizers can be actively controlled by a device connected to sense the output power of the Raman fiber at different wavelengths. For an appropriate control the optical gain can be given any desired shape such as for example a reasonable flatness. The control of the polarization states of the WDM-channels allows for the use of a single wavelength pump source of the amplifier, instead of the conventionally used multiwavelength source.

Place, publisher, year, edition, pages
National Category
Telecommunications Atom and Molecular Physics and Optics
Research subject
URN: urn:nbn:se:kth:diva-81780OAI: diva2:497734
EP 1454436-B1 (2007-02-21)

US 7202996 B2 (2007-04-10)

Available from: 2012-02-10 Created: 2012-02-10 Last updated: 2013-08-07Bibliographically approved

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Popov, Sergei
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Optics (Closed 20120101)
TelecommunicationsAtom and Molecular Physics and Optics

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