Corning O.t.i. Spa

Corning Incorporated

Freni Brembo S.p.a.

Brembo S.p.a.

Pirelli S.p.a.

Centro Informazioni Studi Ed Esperienze S.p.a.

Paolo Vavassori

Fabiano Carminati

Mario Martinelli

Fabrizio Di Pasquale

Simone Biondo

Giovanni Sacchi

Massimiliano Valle

Marco Orlandi

Valeria Gusmeroli

Simone Turani

Aurelio Pianciola

Andrea Gavazzi

Valeria Corio

Konstantin Vikulov

Paolo Gurnari

Alessandro Iommi

Riccardo Sotgiu

A method for making a brake disc may include providing a disc brake with a braking band and depositing on the disc a layer of chromium carbide and nickel-chromium in particle form to form a base protective coating. The method may also include depositing on the base protective coating a material in particle form consisting of tungsten carbide, iron, chromium and aluminium to form a surface protective coating made of tungsten carbide, iron, chromium and aluminium. Both protective coatings may be made by High Velocity Oxygen Fuel or High Velocity Air Fuel or Kinetic Metallization techniques.

Method for making a brake disc and brake disc for disc brake

A method for manufacturing a brake disc may have the following operating steps: a) preparing a brake disc, with a braking band and provided with two mutually opposite braking surfaces; b) depositing on the disc a layer of chromium carbide (Cr3C2) and nickel-chromium (NiCr) in particulate form forming a base protective coating; and c) depositing over the base protective coating a material in particulate form with the tungsten carbide (WC) and cobalt (Co) forming a surface protective coating. Both protective coatings are created with HVOF (High Velocity Oxygen Fuel), HVAF (High Velocity Air Fuel) or KM (Kinetic Metallisation) technique.

Method for manufacturing a brake disc and brake disc for disc brakes

An optical fiber filter includes an optical fiber, a pair of first coupling regions, and a phase-shift region. The optical fiber includes a core and a cladding. An optical signal can pass through the optical fiber. The first coupling regions are formed in the optical fiber, at a predefined mutual distance, for producing power transfer between first and second propagation modes of the optical signal. The phase-shift region is defined by a section of the optical fiber, disposed between the first coupling regions, for producing a phase shift between the first and second propagation modes of the optical signal. In the first coupling regions, the optical fiber includes, in cross-section, an asymmetrical refractive index profile. A related optical fiber filtering device, optical fiber, process for producing an optical filter, optical amplifier, optical telecommunications system, optical fiber modal coupler, and method for filtering an optical signal are also disclosed.

Optical fiber, optical fiber filter, and optical amplifier

A fused optical coupler comprising a polarization maintaining fiber and a standard fiber is provided. The cross-section of the said standard fiber is smaller than the cross-section of the polarization maintaining fiber in the area of fusion of the coupler. The internal forces in the coupling area are sufficiently low to provide an extinction ratio of more than 20 dB at the output of the polarization maintaining fiber.

Method for producing an optical coupler for extracting a signal from a polarization maintaining optical fiber, and corresponding coupler

A temperature-stabilized optical amplifier ( ) comprises at least an erbium-doped waveguide ( ) for amplifying optical signals; at least a first and a second pump sources ( ) for generating respective pump beams at a first and, respectively, a second pump wavelength (&lgr; , &lgr; ), said first and second pump wavelength being lower and, respectively, higher than 978 nm at an intermediate temperature of a predetermined range of temperature, and being subjected to drift as a consequence of temperature variations; and a pump distribution device ( ), optically coupled to said pump sources for receiving said pump beams, and optically coupled to said at least an erbium-doped waveguide for feeding to said at least an erbium-doped waveguide a mixed pump radiation comprising at least a power fraction of each of said pump beams.

Temperature-stabilized optical amplifier and method for temperature-stabilizing an optical amplifier

An optical transmission system includes an optical transmitting unit ( ) to transmit optical signals in a transmission wavelength band above 1570 nm; an optical receiving unit to receive the optical signals; an optical fiber link optically coupling the transmitting unit to the receiving unit, at least an optical amplifying unit ( ) coupled along the link and adapted to amplify the optical signals; the optical amplifying unit ( ) having an amplification wavelength band including the transmission wavelength band and comprising: an input ( ) for the input of the optical signals, an output ( ) for the output of the optical signals, at least an erbium-doped active fiber ( ) for the amplification of the optical signals, having a first end optically coupled to the input ( ) and a second end optically coupled to the output ( ), a pump source ( ) for generating a pump radiation having a wavelength greater than 1400 nm and lower than 1470 nm, and an optical coupler ( ) optically coupling the pump source ( ) to the active fiber ( ).

Optical amplifier and optical transmission system

In a polarimetric fibre-optic sensor using a polarization-maintaining optical fibre with two light propagation modes, a reference light signal is fed to propagate along the optical fibre in accordance with one propagation mode, a series of measurement light signals being induced by a series of optical fibre deformation elements, to propagate along the optical fibre in accordance with the other propagation mode, each being unbalanced in time with respect to the reference light signal by an amount which is different from that of the other measurement light signals; by using particular interferometric techniques, compensating the unbalances and analyzing the signals resulting from the interference between the measurement light signals and the reference light signal it is possible to determine and locate a physical phenomenon which disturbs the optical fibre.

Polarimetric fibre-optic sensor having deformation means

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Bergamo, Italy

Paolo Vavassori