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    COMPRESSION-TUNED BRAGG GRATING AND LASER
    1.
    发明授权
    COMPRESSION-TUNED BRAGG GRATING AND LASER 有权
    压缩TUNED布拉格格和压缩相合LASER

    公开(公告)号：EP1135701B1

    公开(公告)日：2005-03-02

    申请号：EP99972020.4

    申请日：1999-12-06

    申请人： CiDra Corporation

    发明人： FERNALD, Mark, R. ,  BAILEY, Timothy, J. ,  MILLER, Matthew, B. ,  SULLIVAN, James, M. ,  DAVIS, Michael, A. ,  BRUCATO, Robert, N. ,  KERSEY, Alan, D. ,  PUTNAM, Martin, A. ,  SANDERS, Paul, E.

    IPC分类号： G02B1/00

    CPC分类号： G02F1/0115 ,  G02B6/0218 ,  G02B6/022 ,  G02F1/0128 ,  G02F2201/307

    摘要： A compression-tuned Bragg grating includes a tunable optical element 20, 600 which includes either an optical fiber (10) having at least one Bragg grating (12) impressed therein encased within and fused to at least a portion of a glass capillary tube (20) or a large diameter waveguide grating (600) having a core and a wide cladding. Light (14) is incident on the grating (12) and light (16) is reflected at a reflection wavelength lambda 1. The tunable element 20, 600 is axially compressed which causes a shift in the reflection wavelength of the grating (12) without buckling the element. The shape of the element may be other geometries (e.g., a "dogbone" shape) and/or more than one grating or pair of gratings may be used and more than one fiber (10) or core (612) may be used. At least a portion of the element may be doped between a pair of gratings (150, 152), to form a compression-tuned laser or the grating (12) or gratings (150, 152) may be constructed as a tunable DFB laser. Also, the element (20) may have an inner tapered region (22) or tapered (or fluted) sections (27). The compression may be done by a PZT, stepper motor or other actuator or fluid pressure.

    TUNABLE OPTICAL STRUCTURE FEATURING FEEDBACK CONTROL
    2.
    发明公开
    TUNABLE OPTICAL STRUCTURE FEATURING FEEDBACK CONTROL 审中-公开
    具有反馈控制的可调光学传感器

    公开(公告)号：EP1269122A2

    公开(公告)日：2003-01-02

    申请号：EP01922294.2

    申请日：2001-03-06

    申请人： CiDra Corporation

    发明人： PUTNAM, Martin, A. ,  BRUCATO, Robert, N. ,  DAVIS, Michael, A. ,  BELLEMORE, David, G. ,  HELM, Walter, A.

    IPC分类号： G01D5/353

    CPC分类号： G02B6/022 ,  G01D5/35316 ,  G01D5/35377 ,  G01L1/246 ,  G02F1/011

    摘要： A tunable optical device has a compression-tuned optical structure and a displacement sensor. The compression-tuned optical structure responds to an optical signal, and a displacement sensor signal, for providing a compression-tuned optical structure signal containing information about a change in an optical characteristic of the compression-tuned optical structure, and for providing an excitation caused by a change in a displacement of the compression-tuned optical structure. The displacement sensor responds to the excitation, for providing a displacement sensor signal containing information about the change in the displacement of the compression tuned optical structure. The compression-tuned optical structure is an all-glass compression unit shaped like a dogbone. The displacement sensor is a capacitance sensor affixed to the all-glass compression unit for measuring capacitance between two parallel and opposing plates.

    COMPRESSION-TUNED GRATING-BASED OPTICAL ADD/DROP MULTIPLEXER
    3.
    发明公开
    COMPRESSION-TUNED GRATING-BASED OPTICAL ADD/DROP MULTIPLEXER 审中-公开
    压缩MATCHED GRID-BASED光学插入/分出多路复用器

    公开(公告)号：EP1261888A2

    公开(公告)日：2002-12-04

    申请号：EP01937156.6

    申请日：2001-03-06

    申请人： CiDRA Corporation

    发明人： BAILEY, Timothy ,  FERNALD, Mark, R. ,  KERSEY, Alan, D. ,  MACDOUGALL, Trevor ,  PUTNAM, Martin, A. ,  SANDERS, Paul, E.

    IPC分类号： G02B6/16 ,  H04J14/02

    CPC分类号： G02B6/2932 ,  G02B6/022 ,  G02B6/29322 ,  G02B6/29383 ,  G02B6/29395 ,  G02B6/29398 ,  H04J14/021

    摘要： A compression-tuned fiber Bragg grating based reconfigurable wavelength add/drop module has a compression force assembly and an all-glass Bragg grating compression unit having gratings spaced along an axis of compression. The compression force assembly responds to a control electronics signal containing information about a selected wavelength of a channel to be added to or dropped from an optical traffic signal, for providing a compression force applied along the axis of compression. The compression unit responds to the optical traffic signal and the compression force, for providing an all-glass Bragg grating compression unit optical signal having the selected wavelength of the channel to be added to or dropped from the optical traffic signal. The compression unit optical signal may include either the traffic with an added reflected channel(s), or a dropped reflected channel(s). The compression unit is a 'dogbone' structure having either a glass tube with an optical fiber fused therein, or a single large diameter waveguide having a core. The core of the optical fiber or waveguide has the gratings spaced therein. The axis of compression is parallel with the longitudinal axis of the dogbone structure.

    TUBE-ENCASED FIBER GRATING
    4.
    发明授权
    TUBE-ENCASED FIBER GRATING 有权
    输送管道纤维网格

    公开(公告)号：EP1145059B1

    公开(公告)日：2004-04-21

    申请号：EP99972433.9

    申请日：1999-12-06

    申请人： CiDra Corporation

    发明人： FERNALD, Mark, R. ,  BAILEY, Timothy, J. ,  MILLER, Matthew, B. ,  SULLIVAN, James, M. ,  DAVIS, Michael, A. ,  OGLE, Peter ,  KERSEY, Alan, D. ,  PUTNAM, Martin, A. ,  BRUCATO, Robert, N. ,  SANDERS, Paul, E.

    IPC分类号： G02B6/293 ,  G02B6/16

    CPC分类号： G02B6/022 ,  G02B6/0218

    摘要： A tube-encased fiber grating includes an optical fiber (10) having at least one Bragg grating (12) impressed therein which is embedded within a glass capillary tube (20). Light (14) is incident on the grating (12) and light (16) is reflected at a reflection wavelength lambda 1. The shape of the tube (20) may be other geometries (e.g., a "dogbone" shape) and/or more than one concentric tube may be used or more than one grating or pair of gratings may be used. The fiber (10) may be doped at least between a pair of gratings (150, 152), encased in the tube (20) to form a tube-encased compression-tuned fiber laser or the grating (12) or gratings (150, 152) may be constructed as a tunable DFB fiber laser encased in the tube (20). Also, the tube (20) may have an inner region (22) which is tapered away from the fiber (10) to provide strain relief for the fiber (10), or the tube (20) may have tapered (or fluted) sections (27) which have an outer geometry that decreases down to the fiber (10) and provides added fiber pull strength. Also, the tube encased grating (12) exhibits lower mode coupling from the fiber core to the cladding modes due to the increased diameter of the cladding where the tube (20) is fused to the fiber (10) where the grating is located (12).

    TUNABLE GRATING-BASED DISPERSION COMPENSATOR
    5.
    发明公开
    TUNABLE GRATING-BASED DISPERSION COMPENSATOR 审中-公开
    上的可调谐色散补偿器基于单元格网

    公开(公告)号：EP1322979A2

    公开(公告)日：2003-07-02

    申请号：EP01977205.2

    申请日：2001-09-27

    申请人： CiDra Corporation

    发明人： PUTNAM, Martin, A. ,  KERSEY, Alan, D. ,  BAILEY, Timothy, J.

    IPC分类号： G02B6/34 ,  G02B6/16

    CPC分类号： G02B6/29314 ,  G02B6/022 ,  G02B6/02204 ,  G02B6/29394

    摘要： A tunable dispersion compensating device includes a grating element (102) in the form of a bulk or large diameter waveguide, having an outer cladding (104) disposed about an inner core (106). The grating element may be etched, grounded or machined to form a generally 'dog bone' shape, wherein the end portions (108) of the grating element has a larger diameter than the center portion (110) disposed therebetween. A chirped grating (112) is written or impressed within the portion of the core disposed in the center portion of the grating element. The center portion is tapered to allow different stresses to be applied along the grating length when the grating element is compressed longitudinally by force F, and thereby vary chirp of the grating to tunable compensate for dispersion.

    WIDE RANGE TUNABLE OPTICAL FILTER
    6.
    发明公开
    WIDE RANGE TUNABLE OPTICAL FILTER 审中-公开
    FAR可调滤光器

    公开(公告)号：EP1314055A2

    公开(公告)日：2003-05-28

    申请号：EP01968025.5

    申请日：2001-08-17

    申请人： CiDra Corporation

    发明人： KERSEY, Alan, D. ,  DAVIS, Michael, A. ,  PUTNAM, Martin, A. ,  BAILEY, Timothy, J.

    IPC分类号： G02B5/20 ,  G02B6/34 ,  H04J14/02

    CPC分类号： G02B6/4215 ,  G02B6/2932 ,  G02B6/29322 ,  G02B6/29395 ,  H04J14/0209 ,  H04J14/021 ,  H04J14/0213 ,  H04J14/0216 ,  H04J14/0219

    摘要： A tunable optical filter filters is provided that has a pair of tunable Bragg grating units optically coupled to respective ports of a 4-port circulator for filtering a selected wavelength band or channel of light from a DWDM input light. Each grating unit includes an array of Bragg gratings written or embedded within a respective tunable optical element to provide a tunable optical filter that functions over a wide spectral range greater than the tunable range of each grating element. The reflection wavelengths of the array of gratings of each respective gratings element is spaced at a predetermined spacing, such that when a pair of complementary gratings of the grating elements are aligned, the other complementary gratings are misaligned. Both of the optical elements may be tuned to selectively align each complementary grating over each corresponding spectral range.

    TUBE-ENCASED FIBER GRATING
    10.
    发明公开
    TUBE-ENCASED FIBER GRATING 有权
    输送管道纤维网格

    公开(公告)号：EP1145059A2

    公开(公告)日：2001-10-17

    申请号：EP99972433.9

    申请日：1999-12-06

    申请人： CiDra Corporation

    发明人： FERNALD, Mark, R. ,  BAILEY, Timothy, J. ,  MILLER, Matthew, B. ,  SULLIVAN, James, M. ,  DAVIS, Michael, A. ,  OGLE, Peter ,  KERSEY, Alan, D. ,  PUTNAM, Martin, A. ,  BRUCATO, Robert, N. ,  SANDERS, Paul, E.

    IPC分类号： G02B6/293 ,  G02B6/16

    CPC分类号： G02B6/022 ,  G02B6/0218

    摘要： A tube-encased fiber grating includes an optical fiber (10) having at least one Bragg grating (12) impressed therein which is embedded within a glass capillary tube (20). Light (14) is incident on the grating (12) and light (16) is reflected at a reflection wavelength μ1. The shape of the tube (20) may be other geometries (e.g., a 'dogbone' shape) and/or more than one concentric tube may be used or more than one grating or pair of gratings may be used. The fiber (10) may be doped at least between a pair of gratings (150, 152), encased in the tube (20) to form a tube-encased compression-tuned fiber laser or the grating (12) or gratings (150, 152) may be constructed as a tunable DFB fiber laser encased in the tube (20). Also, the tube (20) may have an inner region (22) which is tapered away from the fiber (10) to provide strain relief for the fiber (10), or the tube (20) may have tapered (or fluted) sections (27) which have an outer geometry that decreases down to the fiber (10) and provides added fiber pull strength. Also, the tube encased grating (12) exhibits lower mode coupling from the fiber core to the cladding modes due to the increased diameter of the cladding where the tube (20) is fused to the fiber (10) where the grating is located (12).