Publication

Efficient active Bragg grating tunable filters

Hans Georg Limberger
1997
Conference Papers

Abstract

Reflection, transmission and loss filters based on fiber Bragg gratings are key components in future wavelength division multiplexing telecommunication networks. A shift of the Bragg wavelength, λg, can be achieved by applying a strain or heating the fiber section containing the grating. We report on Bragg grating devices that use a thin metallic coating to directly heat the fiber or a piezoelectric coating to strain it. Such integrated tunable filter devices show DC tuning and modulation capabilities with promise for enhanced efficiency, reduced size, and low electrical power consumption. New active Bragg grating devices based on thin metallic and piezoelectric coatings have been demonstrated showing efficiencies of 4 nm/W and 12 pm/V, respectively

Official source

https://infoscience.epfl.ch/entities/publication/9e662f9c-36b7-400a-8216-d8906a9aec94

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Hans Georg Limberger
1997
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9e662f9c-36b7-400a-8216-d8906a9aec94

About this result

Related concepts (32)

Fiber Bragg grating

A fiber Bragg grating (FBG) is a type of distributed Bragg reflector constructed in a short segment of optical fiber that reflects particular wavelengths of light and transmits all others. This is achieved by creating a periodic variation in the refractive index of the fiber core, which generates a wavelength-specific dielectric mirror. Hence a fiber Bragg grating can be used as an inline optical fiber to block certain wavelengths, can be used for sensing applications, or it can be used as wavelength-specific reflector.

Photonic-crystal fiber

Photonic-crystal fiber (PCF) is a class of optical fiber based on the properties of photonic crystals. It was first explored in 1996 at University of Bath, UK. Because of its ability to confine light in hollow cores or with confinement characteristics not possible in conventional optical fiber, PCF is now finding applications in fiber-optic communications, fiber lasers, nonlinear devices, high-power transmission, highly sensitive gas sensors, and other areas.

Optical fiber

An optical fiber, or optical fibre in Commonwealth English, is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair. Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher bandwidths (data transfer rates) than electrical cables.

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Efficient active Bragg grating tunable filters

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