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    FIBER OPTIC ATTENUATOR
    11.
    发明专利
    FIBER OPTIC ATTENUATOR 未知

    公开(公告)号：CA2117698A1

    公开(公告)日：1993-09-30

    申请号：CA2117698

    申请日：1993-03-08

    Applicant: KAPTRON INC

    Inventor： WONG REN-SUE

    IPC: G01B11/00 ,  G02B6/255 ,  G02B6/26

    Abstract: 2117698 9319391 PCTABS00026 A method for fabricating single-mode and multi-mode attenuators characterized by a high level of wavelength insensitivity. A light source (22) is connected to one end of a fiber (12b) and the other end (12a) is connected to an optical power meter (18). The optical power meter (18) is set to a 0 dB reference. The fiber (12) is then cut and the cut ends cleaved to define first and second segments. The ends of the segments are offset and overlapped by an axial distance that is large relative to the fiber diameter. The overlapping ends are heated so that they assume a fused state, and the relative axial positioning of the fiber ends while they are in the plastic state is adjusted to achieve the desired degree of attenuation, as indicated on the meter (18).

    HYBRID ACTIVE DEVICES COUPLED TO FIBER VIA SPHERICAL REFLECTORS
    13.
    发明专利
    HYBRID ACTIVE DEVICES COUPLED TO FIBER VIA SPHERICAL REFLECTORS 未知

    公开(公告)号：CA2012562A1

    公开(公告)日：1990-09-20

    申请号：CA2012562

    申请日：1990-03-20

    Applicant: KAPTRON INC

    Inventor： KAPANY NARINDER S ,  UNTERLEITNER FRED C

    IPC: G02B6/32 ,  G02B6/34 ,  G02B6/42 ,  H01S5/14

    Abstract: HYBRID ACTIVE DEVICES COUPLED TO FIBER VIA SPHERICAL REFLECTORS Multiple reflection modules having as a light source or a light target a lensed optical fiber employ one more spherical reflectors and wavelength selectors for selecting the wavelengths of optical radiation on selected optical paths between said light source and said light target. The reflection module may be a multiplexer or a laser cavity. As a laser, it may include as a source a semiconductor laser comprising a laser source disposed to direct radiation through a first multiple layer dielectric Fabry-Perot cavity with the center of curvature between the source and a fiber tip to which output energy is to be coupled, and a second reflector mounted behind the first reflector, the second reflector being a full reflector with the center of curvature at the laser source. The first reflector may have a narrow-band optical transmissivity characteristic intended to permit only a narrow band of optical radiation to be coupled to the full reflector, the full reflector disposed as a confocal reflective surface of the laser cavity. Reflections from the first reflector are coupled to a tip of an optical fiber. Other embodiments of the invention are configured as multiplexers. Still other embodiments employ a diffraction grating as part of a laser cavity or as a frequency-selective multiplexer.

    FIBER OPTICS COMMUNICATION MODULES
    19.
    发明专利
    FIBER OPTICS COMMUNICATION MODULES 未知

    公开(公告)号：CA1249466A

    公开(公告)日：1989-01-31

    申请号：CA435531

    申请日：1983-08-29

    Applicant: KAPTRON INC

    Inventor： KAPANY NARINDER S ,  UNTERLEITNER FRED C

    IPC: G02B6/34 ,  G02B6/26 ,  G02B6/28 ,  G02B27/10

    Abstract: The present invention provides modules for interfacing optical fibers with very low light loss and with provision for monitoring of the optical signal. The modules according to the present invention are characterized by the precise tolerances required in high capacity optical communication systems and yet may be mass produced at reasonable costs. One device according to the present invention comprises an imaging element having a spaced pair of curved reflective surface at one end and prealigned fiber insertion holes at the other end. The input and output terminals of the couplers may be configured so that a small number of basic coupler structures may be used to perform a wide variety of functions. A coupler according to the present invention includes a first spherical reflective surface characterized by a self-conjugate plane having the property that a point source of light in the self-conjugate plane is imaged in the self-conjugate plane and a second spherical reflective surface disposed between said first spherical reflective surface and the self-conjugate plane, said second spherical reflective surface defining means having the properties that a point source of light within a first selected wavelength range and in said focal plane is imaged by a dichroic medium in said focal plane, and that a point source of light outside of said selected wavelength range and in said focal plane passes through said second spherical reflective surface defining means and is imaged in said focal plane by said first spherical reflective surface defining means. Various embodiments of the invention are disclosed.

    SWITCH
    20.
    发明专利
    SWITCH 未知

    公开(公告)号：GB8432087D0

    公开(公告)日：1985-01-30

    申请号：GB8432087

    申请日：1984-12-19

    Applicant: KAPTRON INC

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