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    Mode coupling optical waveguide grating
    11.
    发明专利
    Mode coupling optical waveguide grating 未知

    公开(公告)号：AU720592B2

    公开(公告)日：2000-06-08

    申请号：AU3745397

    申请日：1997-09-09

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： STRASSER THOMAS A

    IPC: G02B6/126 ,  G02B6/02 ,  G02B6/14 ,  G02B6/34 ,  H01S3/067

    Abstract: Reflective mode coupling refractive index gratings are disclosed. The gratings can couple light of wavelength lambda i in a fundamental spatial mode of the waveguide (e.g., LP01) to a reflected higher order spatial mode (e.g., LP11), substantially without reflection of any light of wavelength lambda j NOTEQUAL lambda i in a spectral range DELTA lambda APPROXLESS 0.01 lambda i. The mode coupling gratings (MCGs) can find a variety of uses in optical fiber systems. Exemplarily, an MCG can serve as a wavelength-dependent loss element with abrupt (e.g., SIMILAR 1 nm) spectral dependence. However, a chirped grating with or without strength modulation can yield an MCG having relatively wide spectral dependence, including variable loss over a relatively wide (e.g., SIMILAR 10 nm) spectral range. Both types of MCGs are advantageously used in, for instance, optical waveguide amplifiers.

    Mode coupling optical waveguide grating
    16.
    发明专利
    Mode coupling optical waveguide grating 未知

    公开(公告)号：AU3745397A

    公开(公告)日：1998-03-19

    申请号：AU3745397

    申请日：1997-09-09

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： STRASSER THOMAS A

    IPC: G02B6/126 ,  G02B6/02 ,  G02B6/14 ,  G02B6/34 ,  H01S3/067

    Abstract: Reflective mode coupling refractive index gratings are disclosed. The gratings can couple light of wavelength lambda i in a fundamental spatial mode of the waveguide (e.g., LP01) to a reflected higher order spatial mode (e.g., LP11), substantially without reflection of any light of wavelength lambda j NOTEQUAL lambda i in a spectral range DELTA lambda APPROXLESS 0.01 lambda i. The mode coupling gratings (MCGs) can find a variety of uses in optical fiber systems. Exemplarily, an MCG can serve as a wavelength-dependent loss element with abrupt (e.g., SIMILAR 1 nm) spectral dependence. However, a chirped grating with or without strength modulation can yield an MCG having relatively wide spectral dependence, including variable loss over a relatively wide (e.g., SIMILAR 10 nm) spectral range. Both types of MCGs are advantageously used in, for instance, optical waveguide amplifiers.

    17.
    发明专利
    未知

    公开(公告)号：DE69736265T2

    公开(公告)日：2007-06-06

    申请号：DE69736265

    申请日：1997-09-02

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： STRASSER THOMAS A

    IPC: G02B6/02 ,  G02B6/126 ,  G02B6/14 ,  G02B6/34 ,  H01S3/067

    Abstract: Reflective mode coupling refractive index gratings are disclosed. The gratings can couple light of wavelength lambda i in a fundamental spatial mode of the waveguide (e.g., LP01) to a reflected higher order spatial mode (e.g., LP11), substantially without reflection of any light of wavelength lambda j NOTEQUAL lambda i in a spectral range DELTA lambda APPROXLESS 0.01 lambda i. The mode coupling gratings (MCGs) can find a variety of uses in optical fiber systems. Exemplarily, an MCG can serve as a wavelength-dependent loss element with abrupt (e.g., SIMILAR 1 nm) spectral dependence. However, a chirped grating with or without strength modulation can yield an MCG having relatively wide spectral dependence, including variable loss over a relatively wide (e.g., SIMILAR 10 nm) spectral range. Both types of MCGs are advantageously used in, for instance, optical waveguide amplifiers.

    18.
    发明专利
    未知

    公开(公告)号：DE69736265D1

    公开(公告)日：2006-08-17

    申请号：DE69736265

    申请日：1997-09-02

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： STRASSER THOMAS A

    IPC: G02B6/02 ,  G02B6/126 ,  G02B6/14 ,  G02B6/34 ,  H01S3/067

    Abstract: Reflective mode coupling refractive index gratings are disclosed. The gratings can couple light of wavelength lambda i in a fundamental spatial mode of the waveguide (e.g., LP01) to a reflected higher order spatial mode (e.g., LP11), substantially without reflection of any light of wavelength lambda j NOTEQUAL lambda i in a spectral range DELTA lambda APPROXLESS 0.01 lambda i. The mode coupling gratings (MCGs) can find a variety of uses in optical fiber systems. Exemplarily, an MCG can serve as a wavelength-dependent loss element with abrupt (e.g., SIMILAR 1 nm) spectral dependence. However, a chirped grating with or without strength modulation can yield an MCG having relatively wide spectral dependence, including variable loss over a relatively wide (e.g., SIMILAR 10 nm) spectral range. Both types of MCGs are advantageously used in, for instance, optical waveguide amplifiers.

    19.
    发明专利
    未知

    公开(公告)号：DE69714378D1

    公开(公告)日：2002-09-05

    申请号：DE69714378

    申请日：1997-10-21

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： STRASSER THOMAS A ,  WAGENER JEFFERSON LYNN

    IPC: G02B6/02 ,  G02B6/34 ,  G02B6/42 ,  G02B6/12 ,  G02B6/16

    Abstract: A dispersive optical wave guide tap comprises a blazed and chirped refractive index grating (14) in the core of the waveguide (12), coupling means (15) and utilization means (19). The grating is selected such that guided mode light of predetermined wavelength will, in the absence of the coupling means, be directed into one or more cladding modes of the waveguide. The presence of the coupling means in optical cooperation with the waveguide, changes the guiding conditions such that the cladding modes are substantially eliminated from a portion of the waveguide that includes the cladding, whereby the grating directs the guided mode light into one or more radiation modes. The blaze angle typically is ≤15 DEG . The chirp serves to bring the radiation mode light substantially to a focus in at least one dimension, the focal point (or line) depending on the wavelength of the light. The utilization means exemplarily comprise an array of photodetectors, and the coupling means exemplarily comprise an appropriately shaped glass member and index matching means. Dispersive waveguide taps are advantageously used in WDM optical communication systems, e.g., to provide status information (e.g., channel wavelength, channel power, including presence or absence of a channel) to, e.g., a system maintenance unit. The status information facilitates maintenance of operating conditions by conventional feedback control.

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