Coupler extracting an optical signal

Details Coupler extracting an optical signal Coupler extracting an optical signal

1983-10-13

1986-05-27

Lee, John

350 9616, 350 9618, G02B 626

Patent

active

045912378

ABSTRACT:
A coupler extracting an optical signal between an upstream fiber (1) and a downstream fiber (2) to ensure the continuity of transmission from (1) to (2) and at the same time to extract through (3) a part of the signal and to inject from (4) towards (2) a new signal, a coupler employing a spherical mirror (17) by object-image conjugation of the two fibers (1, 2) which are arranged symmetrically relative to the center (C.sub.1) of the mirror. According to the invention it comprises a second spherical partial mirror (13) with the same equatorial plane (11) as the first mirror and placed between the first mirror (17) and the plane (11). The centers (C.sub.1) and (C.sub.2) of the two mirrors are offset in the plane (11) and the fibers (3) and (4) are arranged symmetrically to (1) and (2) relative to the center C.sub.2 of the mirror (13).

REFERENCES:
patent: 3883223 (1975-05-01), Hudson
patent: 4479697 (1984-10-01), Kapany et al.
patent: 4484793 (1984-11-01), Laude

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