Pirelli Cavi S.p.a.

Cisco Technology, Inc.

Stefano Vanoli

Mario Tamburello

Giovanni Delrosso

Massimo Armiraglio

Stefano Simone Turzi

The spectrum of a received WDM band or subband is analyzed to detect failure of, e.g., fiber or amplifiers along a line. In one implementation, measurements are taken within the optical spectrum at locations of expected data-carrying optical signals and at two locations just outside the wavelength range occupied by these signals. Magnitudes of adjacent measurements are compared to obtain differences. If none of the differences exceed a threshold, a fault may be determined.

Subband spectrum analysis for optical multiplex section protection

A multi-wavelength optical telecommunication method includes the steps of generating at least one optical transmission signal in a predetermined wavelength band, transmitting the optical transmission signal through an optical fibre to a receiving station, receiving the optical transmission signal through a passband filter and filtering the signal to let the transmission signal alone pass. The wavelength band is scanned in order to identify in the band a recognizable portion of the optical spectrum being received, thus determining, based on the operating conditions corresponding to the recognizable spectrum portion, a search range of the transmission signal within which the transmission signal is searched out and recognized based on its spectral profile.

Telecommunication system and method for wavelength-division multiplexing

An optoelectronic apparatus comprising a casing (110) inside which an electronic unit and an optical unit electrically interconnected are disposed; the optical unit comprises an element (100) on which at least one component is housed, which can be of an optical type, of optical connection, of an electro-optical type (270, 275, 300), said element (100) comprising a plurality of separate areas (190, 195), so that each area houses components substantially of a single type.

Apparatus and method for housing optical components

An optoelectronic apparatus includes a casing and an optical unit (300) on which at least one component (300) having high heat emission is disposed. This component is initially linked with clearance with the optical unit, by first fastening means, and in a second step by second fastening means the component is fixedly secured to the casing in a thermal contact state.

Apparatus and method for housing high heat emission electro-optical

A multi-wavelength optical telecommunication method includes the steps of generating at least one optical transmission signal in a predetermined wavelength band, transmitting the optical transmission signal through an optical fiber to a receiving station, receiving the optical transmission signal through a passband filter and filtering the signal to let the transmission signal alone pass. The wavelength band is scanned in order to identify in the band a recognizable portion of the optical spectrum being received, thus determining, based on the operating conditions corresponding to said recognizable spectrum portion, a search range of said transmission signal within which the transmission signal is searched out and recognized based on its spectral profile.

The optical amplifier (1) comprises optical components (2-13), connection light guide sections (14) between the optical components, and electronic and electrical power supply and control components (41,42). It is characterized in that it comprises:

Compact-size optical amplifier having separate functions

An optical amplifier (1) includes optical components including at least one optical amplifying active fiber and a pump laser supplying pumping power to the amplifying fiber through an optical coupler, light guide sections (14) for connecting the optical components, and electronic and electrical power supply and control components (41,42). The amplifier is characterized in that it includes: an optical unit (15) including all the optical components (2-13) and the connection light guide sections (14), an electronic unit (16) including all the electronic and electrical components (41,42) and being separate from the optical unit (15), a plate between the optical unit and the electronic unit; and electrical interconnections (43,44) between the optical unit (15) and the electronic unit (16). The clear separation of the electronic components (41,42) from the optical components (2-13) affords size reductions and rationalization of the amplifier (1) implementation procedure.

The amplifier (1) comprises two active light guide sections (7,10), two dichroic couplers (5,8), two pump laser sources (6,8) acting on the active light guide sections (7,10) through the dichroic couplers (5,8), two directional couplers (3,11) associated with two respective optical meters (4,12), and light guide sections (14) for interconnecting the various components. The dichroic (5,8) and directional (3,11) couplers, and the optical meters (4,12), are pre-assembled onto an auxiliary frame (21); the active (7,10) and connection (14) light guide sections are wound on two drums (30) provided on an organizer frame (28). The auxiliary frame (21), organizer frame (28), and pump laser sources (6,9) are accommodated on a main frame (15).

Growing community of inventors

Verdellino, Italy

Stefano Vanoli