Acreo Ab

Åsa Claesson

Walter Margulis

Michael Fokine

Lars-Erik Nilsson

Leif Kjellberg

Laurent Krummenacher

Hania Arsalane

Pedro Torres

A method of forming a longitudinal solid body within at least one longitudinal hole formed in an optical fiber, comprising the steps of placing a first end and a portion of the optical fiber in a heating chamber; keeping a second end of said optical fiber outside of the heating chamber; forcing a molten material into the longitudinal hole of the fiber from the first end; and thereupon longitudinally extracting the optical fiber from the heating chamber at a controlled rate. Preferably, the fiber is extracted while molten material is being urged into the fiber.

Method for forming a longitudinal solid body within an optical fiber

The invention relates to a method and a device for controlling the refractive index in the core of an optical fiber. According to the invention, an optical fiber is provided with a longitudinal electrode running along the core of the fiber. An electric current is passed through the electrode to induce ohmic heating thereof, causing thermal expansion and consequently a compressing force upon the core of the fiber. This compression of the core leads to induced changes in the refractive index in the direction of the compressing force, and hence induces or alters birefringence in the core.

Method and device for controlling the refractive index in an optical fiber

Growing community of inventors

Stockholm, Sweden

Åsa Claesson