Avanex Corporation

Corning Incorporated

Corning O.t.i. Spa

Sirtl S.p.a.

Aurelio Pianciola

Paolo Milanese

Marco De Donno

Valeria Corio

Paolo Vavassori

Tiziana Tambosso

Marco Decao

Optical pumping unit comprising a first pump source adapted to emit a first pump radiation at wavelength &#x3bb;pa second pump source adapted to emit a second pump radiation at wavelength &#x3bb;pwith wavelength &#x3bb;pdifferent from wavelength &#x3bb;pand a common coupling section comprising a first and a second port connected to the first and second pump source for respectively receiving the first and the second pump radiation; a third port for a signal radiation at wavelength &#x3bb;s; a fourth port, wherein the coupling section is adapted to combine, in the fourth port, the signal radiation and the first and second pump radiation through a reversal of the direction of propagation of the first pump radiation from the first port to the fourth port.

Pumping method and unit for optical amplifiers

A method of making an all-fiber Mach-Zehnder interferometer comprising at least two optical fibers comprises the steps of bringing the fibers in a reciprocal contact relationship for a contact section thereof; fusing together and tapering the fibers in at least a first portion of said contact section; forming at least two optical couplers between the fibers in a second and a third portions of said contact section, located at opposite sides of said first portion.

Method of making a Mach-Zehnder interferometer, and related device

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

Optical pumping unit comprising a first pump source adapted to emit a first pump radiation at wavelength &lgr;p a second pump source adapted to emit a second pump radiation at wavelength &lgr;p with wavelength &lgr;p different from wavelength &lgr;p and a common coupling section comprising a first and a second port connected to the first and second pump source for respectively receiving the first and the second pump radiation; a third port for a signal radiation at wavelength &lgr;s; a fourth port, wherein the coupling section is adapted to combine, in the fourth port, the signal radiation and the first and second pump radiation through a reversal of the direction of propagation of the first pump radiation from the first port to the fourth port.

A method for fusion-forming an optical signal attenuator using a piece of optical fibre, comprising essentially the following steps: a) fusing the piece of optical fibre; b) manipulating the piece of optical fibre during fusion; c) inserting the piece of optical fibre into a mechanical adaptor for connection to two standard connectors butt-coupled respectively to the ends of two optical fibres, wherein the manipulation of the piece of optical fibre during fusion is effected by subjecting the piece of optical fibre to both axial misalignment and angular misalignment.

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Casteggio, Italy

Aurelio Pianciola