Abstract: A stage of a steam turbine, having a rotor extending along a longitudinal axis, has a fixed stage and a movable stage arranged successively along a flow channel for feeding steam in a direction substantially parallel to the longitudinal axis; the fixed stage has an inner ring coaxial with the longitudinal axis, and a number of stator blades arranged radially about the inner ring; each stator blade is fixed to an annular top portion of the inner ring, which has a top surface facing the flow channel and crosswise to the longitudinal axis; and the movable stage has a number of rotor blades arranged radially about the rotor and fixed to the rotor.

Abstract: A stage of a steam turbine, having a rotor extending along a longitudinal axis, has a fixed stage and a movable stage arranged successively along a flow channel for feeding steam in a direction substantially parallel to the longitudinal axis; the fixed stage has an inner ring coaxial with the longitudinal axis, and a number of stator blades arranged radially about the inner ring; each stator blade is fixed to an annular top portion of the inner ring, which has a top surface facing the flow channel and crosswise to the longitudinal axis; and the movable stage has a number of rotor blades arranged radially about the rotor and fixed to the rotor.

Abstract: An optical radiation adapted for use in Raman amplification in a given band, is generated from a low power optical radiation with a respective bandwidth, generated by a plurality of master oscillators, such as low-power laser diodes whose output radiation is multiplexed by a multiplexer. A Raman amplification medium is provided, such as a length of optical fiber, and an additional optical radiation adapted for use in Raman amplification in said Raman amplification medium is generated. Both the low-power optical radiation and the additional optical radiation are injected into the medium so to produce, by the Raman effect induced in the medium, the output optical radiation.

Abstract: An optical radiation adapted for use in Raman amplification in a given band, is generated from a low power optical radiation with a respective bandwidth, generated by a plurality of master oscillators, such as low-power laser diodes whose output radiation is multiplexed by a multiplexer. A Raman amplification medium is provided, such as a length of optical fiber, and an additional optical radiation adapted for use in Raman amplification in said Raman amplification medium is generated. Both the low-power optical radiation and the additional optical radiation are injected into the medium so to produce, by the Raman effect induced in the medium, the output optical radiation.

Abstract: A method and apparatus for determining the position of a mobile body which is movable along a rectilinear path relative to a fixed reference body in which the position of the mobile body is independent of any spurious movements of the body or variations in the intensity of the source of radiation.