Cladding-pumped quasi 3-level fiber laser/amplifier

    公开(公告)号:AU2004310422A1

    公开(公告)日:2005-05-26

    申请号:AU2004310422

    申请日:2004-11-08

    Applicant: CORNING INC

    Abstract: An optically active fiber ( 30 ) is disclosed for making a fiber laser ( 18 ) or an amplifier ( 16 ) for optically pumping by a broad area laser diode for operation in the 1.5 micron band. This double-clad structured active fiber ( 30 ) has a core ( 34 ), doped with an optically excitable erbium ion having a quasi-three-level transition. The core ( 3 ) has a core refractive index and a core cross-sectional area. An inner cladding ( 32 ) surrounds the core ( 34 ). The inner cladding ( 32 ) has an inner cladding refractive index less than the core refractive index, an inner cladding cross-sectional area between 2 and 25 times greater than that of the core cross-sectional area, and an aspect ratio greater than 1.5:1. An outer cladding ( 36 ) surrounds the inner cladding ( 32 ) and has an outer cladding refractive index less than the inner cladding refractive index.

    Thulium doped fiber amplifier pumping scheme

    公开(公告)号:AU2002252616A1

    公开(公告)日:2002-12-03

    申请号:AU2002252616

    申请日:2002-04-08

    Applicant: CORNING INC

    Abstract: An optical amplifier comprises a trivalent thulium-doped optical fiber; a first pump light emitting device optically coupled to the fiber for generating a primary pump source at a first wavelength, and a second pump light emitting device optically coupled to the fiber for generating a secondary pump source at a second wavelength. In a preferred aspect of the present invention, the amplifier also includes a third (auxiliary) pump light emitting device optically coupled to the fiber for generating a third pump source at a third wavelength. Each of the amplification signals comprise at least one pre-selected wavelength. The first amplification signal has a wavelength pre-selected to provide a reduced noise figure for the amplifier. The second amplification signal has a wavelength pre-selected to increase the optical efficiency of the amplifier. The third amplification signal can have a wavelength pre-selected to populate the 3F4 energy level of the fiber, and to minimize depletion of the 3H6 ground state.

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