G - Physics – 02 – B
Patent
G - Physics
02
B
88/97.5
G02B 6/26 (2006.01) G02B 6/28 (2006.01) G02B 6/34 (2006.01) G02B 27/10 (2006.01)
Patent
CA 1249466
ABSTRACT OF THE DISCLOSURE 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.
435531
Kapany Narinder S.
Unterleitner Fred C.
Gowling Lafleur Henderson Llp
Kaptron Inc.
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