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    FIBER GRATING FEEDBACK STABILIZATION OF BROAD AREA LASER DIODE
    1.
    发明专利
    FIBER GRATING FEEDBACK STABILIZATION OF BROAD AREA LASER DIODE 未知

    公开(公告)号：CA2329089C

    公开(公告)日：2006-04-11

    申请号：CA2329089

    申请日：1999-04-13

    Applicant: SCIENTIFIC ATLANTA

    Inventor： ANTHON DOUGLAS W

    IPC: H01S5/068 ,  G02B6/42 ,  H01S5/10 ,  H01S5/14 ,  H01S5/20 ,  H01S5/40 ,  H01S5/50

    Abstract: The laser device of the present invention includes a high-power, fiber-coupl ed optical source having a broad area laser diode (10) with a high reflective coating at its rear facet (12), coupling optics (20), and an optical fiber (30) having fiber grating (32). The fiber grating (32) serves to reflect a portion of the optical beam back to the broad area laser diode (10), thereby stabilizing the wavelength of the optical beam. The fiber grating (32) and the rear facet (12) of the broad area laser diode (10) serve as nodes for an external resonator, thereby limiting the diffraction of the optical beam. The effects of wavelength fluctuation and beam diffraction are reduced together using minimal mechanical components.

    4.
    发明专利
    未知

    公开(公告)号：BR0111246A

    公开(公告)日：2004-12-07

    申请号：BR0111246

    申请日：2001-06-12

    Applicant: SCIENTIFIC ATLANTA

    Inventor： ANTHON DOUGLAS W ,  FISHER JAMES H

    IPC: G02B6/26 ,  G02B6/32 ,  G02B6/34 ,  G02F1/09 ,  G02F1/095 ,  H01S3/094 ,  G02B6/24

    Abstract: Systems and methods are described for the construction of micro-optical couplers incorporating optical tapers to reshape multimode optical inputs. Incorporating tapers allows the spatial properties of the multimode inputs to be adjusted to match to the spatial properties of the output fiber, even in systems that are limited to unity-magnification imaging optics. In an exemplary embodiment, a larger-core multimode fiber and a smaller-core double-clad fiber are glued into a glass capillary, with the multimode fiber tapering to a smaller diameter inside the capillary. Polishing the capillary to expose the taper gives a multimode core that is smaller than the double-clad core. Imaging with unity magnification through a GRIN lenses and a dichroic reflector transfers the multimode input efficiently to the double-clad fiber with greater efficiency than would have been possible with the same optics and an untapered fiber. The dichroic reflector is transparent to a second singlemode signal input, which is collimated by a second GRIN lens and coupled to through the reflector to the core of the double-clad fiber. An isolator may be included in the signal beam path, and the double-clad fiber may be replaced by a double-clad gain fiber.

    MULTI-FUNCTIONAL OPTICAL ISOLATOR
    5.
    发明专利
    MULTI-FUNCTIONAL OPTICAL ISOLATOR 未知

    公开(公告)号：CA2273538A1

    公开(公告)日：1999-12-04

    申请号：CA2273538

    申请日：1999-06-03

    Applicant: SCIENTIFIC ATLANTA

    Inventor： SIPES DONALD L JR ,  ANTHON DOUGLAS W

    IPC: G02B6/26

    Abstract: A multi-functional optical isolator that couples radiation from a plurality of input fibers to a plurality of output fibers such that an optical beam emitted from any particular input fiber is transmitted only to its corresponding output fiber. Additionally, an optical beam emitted in the reverse direction from any output fiber is not transmitted back into any of the input or output fibers. The multi-functional optical isolator includes a first focusing lens that collimates the optical radiation emitted from the input fibers and causes them to pass through an optical isolator. The optical isolator has polarizing elements and a magneto-optic polarization rotator. A second focusing lens focuses the optical beams into the output fibers such that the optical radiation from each input fiber is coupled to its corresponding output fiber. Additional off axis optical elements at other wavelengths may be used for providing bulk-optic coupling of a pump light into a singlemode or multi-mode core of a doped fiber. A vee-shaped isolator with a high reflector in the isolated beam path is possible and provides for additional beams coupled through the reflector.

    FIBER GRATING FEEDBACK STABILIZATION OF BROAD AREA LASER DIODE
    7.
    发明专利
    FIBER GRATING FEEDBACK STABILIZATION OF BROAD AREA LASER DIODE 未知

    公开(公告)号：CA2329089A1

    公开(公告)日：1999-10-28

    申请号：CA2329089

    申请日：1999-04-13

    Applicant: SCIENTIFIC ATLANTA

    Inventor： ANTHON DOUGLAS W

    IPC: G02B6/42 ,  H01S5/10 ,  H01S5/14 ,  H01S5/20 ,  H01S5/40 ,  H01S5/50 ,  H01S3/085

    Abstract: The laser device of the present invention includes a high-power, fiber-coupl ed optical source having a broad area laser diode (10) with a high reflective coating at its rear facet (12), coupling optics (20), and an optical fiber (30) having fiber grating (32). The fiber grating (32) serves to reflect a portion of the optical beam back to the broad area laser diode (10), thereby stabilizing the wavelength of the optical beam. The fiber grating (32) and t he rear facet (12) of the broad area laser diode (10) serve as nodes for an external resonator, thereby limiting the diffraction of the optical beam. Th e effects of wavelength fluctuation and beam diffraction are reduced together using minimal mechanical components.

    8.
    发明专利
    未知

    公开(公告)号：ES2191576T1

    公开(公告)日：2003-09-16

    申请号：ES01946250

    申请日：2001-06-12

    Applicant: SCIENTIFIC ATLANTA

    Inventor： ANTHON DOUGLAS W ,  FISHER JAMES H

    IPC: G02B6/26 ,  G02B6/32 ,  G02B6/34 ,  G02F1/09 ,  G02F1/095 ,  H01S3/094

    Abstract: Systems and methods are described for the construction of micro-optical couplers incorporating optical tapers to reshape multimode optical inputs. Incorporating tapers allows the spatial properties of the multimode inputs to be adjusted to match to the spatial properties of the output fiber, even in systems that are limited to unity-magnification imaging optics. In an exemplary embodiment, a larger-core multimode fiber and a smaller-core double-clad fiber are glued into a glass capillary, with the multimode fiber tapering to a smaller diameter inside the capillary. Polishing the capillary to expose the taper gives a multimode core that is smaller than the double-clad core. Imaging with unity magnification through a GRIN lenses and a dichroic reflector transfers the multimode input efficiently to the double-clad fiber with greater efficiency than would have been possible with the same optics and an untapered fiber. The dichroic reflector is transparent to a second singlemode signal input, which is collimated by a second GRIN lens and coupled to through the reflector to the core of the double-clad fiber. An isolator may be included in the signal beam path, and the double-clad fiber may be replaced by a double-clad gain fiber.

    MULTI-MODE FIBER LASERS
    10.
    发明申请
    MULTI-MODE FIBER LASERS 审中-公开
    多模光纤激光器

    公开(公告)号：WO9927619A3

    公开(公告)日：1999-07-15

    申请号：PCT/US9820493

    申请日：1998-09-30

    Applicant: SCIENTIFIC ATLANTA

    Inventor： ANTHON DOUGLAS W

    IPC: H01S3/067 ,  H01S3/06

    CPC classification number: H01S3/0675 ,  H01S3/08022

    Abstract: A multimode fiber laser (40) is provided for generating a laser wave having multiple modes disposed about the desired laser wavelength. The laser includes a pump source (44) for generating a laser pump wave, and an optical fiber (42) disposed in a laser cavity. The cavity itself is defined by an input mirror (11) and an output mirror (12) which may be provided as endfaces (46 and 48) of fiber optic section (42). The fiber optic section may be a ytterbium, erbium co-doped phosphate glass optical fiber.

    Abstract translation: 提供多模光纤激光器（40），用于产生具有围绕所需激光波长设置的多个模式的激光波。 激光器包括用于产生激光泵浦波的泵浦源（44）和设置在激光腔中的光纤（42）。 腔体本身由输入反射镜（11）和输出镜（12）限定，输出镜可以设置为光纤部分（42）的端面（46和48）。 光纤部分可以是镱，铒共掺磷酸盐玻璃光纤。

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