Publication

Post-irradiation resonance wavelength adjustment of long period grating based loss filters

Hans Georg Limberger
1997
Conference Papers

Abstract

We present a simple technique to precisely and continuously adjust the resonance wavelengths of long-period cladding-mode-coupled gratings without strongly affecting the coupling strength. The main principle of this method is based on the strong dependence of the propagation constants and hence the peak positions of the cladding modes on the cladding diameter. Therefore, one can shift the grating resonance wavelength by changing the cladding dimension. In our case, this has been achieved by etching the fiber in a HF acid solution

Official source

https://infoscience.epfl.ch/entities/publication/07a91281-d078-4840-8daf-b11ffa6a9dac

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Hans Georg Limberger
1997
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/07a91281-d078-4840-8daf-b11ffa6a9dac

About this result

Related concepts (30)

Double-clad fiber

Double-clad fiber (DCF) is a class of optical fiber with a structure consisting of three layers of optical material instead of the usual two. The inner-most layer is called the core. It is surrounded by the inner cladding, which is surrounded by the outer cladding. The three layers are made of materials with different refractive indices. There are two different kinds of double-clad fibers. The first was developed early in optical fiber history with the purpose of engineering the dispersion of optical fibers.

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In fiber-optic communication, a single-mode optical fiber (SMF), also known as fundamental- or mono-mode, is an optical fiber designed to carry only a single mode of light - the transverse mode. Modes are the possible solutions of the Helmholtz equation for waves, which is obtained by combining Maxwell's equations and the boundary conditions. These modes define the way the wave travels through space, i.e. how the wave is distributed in space. Waves can have the same mode but have different frequencies.

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Post-irradiation resonance wavelength adjustment of long period grating based loss filters

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