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    Photothermal optical signal limiter
    1.
    发明专利
    Photothermal optical signal limiter 未知

    公开(公告)号：AU3930502A

    公开(公告)日：2002-07-01

    申请号：AU3930502

    申请日：2001-11-15

    Applicant: CORNING INC

    Inventor： BOOKBINDER DANA C ,  CARACCI STEPHEN J ,  DEROSA MICHAEL E ,  LESLIE THOMAS M ,  LOGUNOV STEPHAN L

    IPC: G02B6/26 ,  G02F1/01 ,  G02B6/42

    Abstract: An optical signal limiter is provided for limiting transmission of a continuous wave optical signal that exceeds a preselected threshold power level. The limiter includes a body having input and output ends that is formed at least in part from a material having a negative thermal index coefficient of between about -0.5x10-4° C.-1 and -4.0x10-4 ° C.1 and an absorption coefficient of between 1.0 to 5.0 dB/cm at wavelengths between 980-1650 nm. The limiter also includes collimating fibers mounted on the input and output ends to minimize low power signal losses across the limiter body. It may be installed at a junction between two optical fibers and is preferably formed from a curable adhesive having the aforementioned negative thermal index coefficient to obviate the need for separate bonding materials and joining steps during the installation of the limiter. The optical limiter is reusable and with a recovery time of 1-5 milliseconds advantageously prevents power surges in optical circuits from damaging sensitive optical components by limiting the amplitude of such surges within 0.2-0.5 milliseconds.

    Photothermal optical signal limiter
    7.
    发明专利
    Photothermal optical signal limiter 未知

    公开(公告)号：AU2697402A

    公开(公告)日：2002-07-01

    申请号：AU2697402

    申请日：2001-11-26

    Applicant: CORNING INC

    Inventor： BOOKBINDER DANA C ,  CARACCI STEPHEN J ,  DEROSA MICHAEL E ,  LESLIE THOMAS M ,  LOGUNOV STEPHAN L

    IPC: G02B6/26 ,  G02F1/01 ,  G02B6/42

    Abstract: An optical signal limiter is provided for limiting transmission of a continuous wave optical signal that exceeds a preselected threshold power level. The limiter includes a body having input and output ends that is formed at least in part from a material having a negative thermal index coefficient of between about -0.5x10-4° C.-1 and -4.0x10-4 ° C.1 and an absorption coefficient of between 1.0 to 5.0 dB/cm at wavelengths between 980-1650 nm. The limiter also includes collimating fibers mounted on the input and output ends to minimize low power signal losses across the limiter body. It may be installed at a junction between two optical fibers and is preferably formed from a curable adhesive having the aforementioned negative thermal index coefficient to obviate the need for separate bonding materials and joining steps during the installation of the limiter. The optical limiter is reusable and with a recovery time of 1-5 milliseconds advantageously prevents power surges in optical circuits from damaging sensitive optical components by limiting the amplitude of such surges within 0.2-0.5 milliseconds.

    Photothermal optical switch and variable attenuator
    8.
    发明专利
    Photothermal optical switch and variable attenuator 未知

    公开(公告)号：AU2053301A

    公开(公告)日：2001-06-25

    申请号：AU2053301

    申请日：2000-11-30

    Applicant: CORNING INC

    Inventor： DEROSA MICHAEL E ,  GUERMEUR CELINE ,  LOGUNOV STEPHAN L ,  MORONI MARC ,  VIDIELLA GUILHEM M

    IPC: G02F1/01 ,  G02F1/061 ,  G02F1/225 ,  G02F1/313

    Abstract: An optical device (30) which utilizes a photothermal optical effect to achieve switching or attenuation includes a waveguide defined by a waveguide core (36) and a surrounding cladding (34), wherein the polymer waveguide core (36) includes a region (38) consisting of a photothermally responsive material having an absorption coefficient at a switch wavelength or attenuation wavelength that is higher than an absorption coefficient at a signal wavelength. Switching devices include an optical splitter circuit having a branch (36B) that includes the photothermally responsive material, and either a multiplexer for introducing light at the switch wavelength into the optical circuit or a light source (40) focused at the photothermally responsive material. Attenuating devices include a Mach-Zehnder type interferometer having a branch that includes the photothermally responsive material and either a multiplexer for introducing light at the attenuation wavelength into the optical circuit or a light source focused at the photothermally responsive material.

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