Coupler for optical fiber waveguides and method of constructing

Details Coupler for optical fiber waveguides and method of constructing Coupler for optical fiber waveguides and method of constructing

1977-03-01

1979-03-27

Hille, Rolf G.

350 9619, 350 372, G02B 514

Patent

active

041462980

ABSTRACT:
A method for constructing and an apparatus for accessing individual or multiple guided optical fiber modes. Coupling can be accomplished at any point along an optical fiber through the fiber cladding. The coupler is based upon a technique for converting a guided optical mode into a leaky mode by varying the index of refraction of the optical fiber cladding. Transforming between the leaky mode radiation and a desired spatial power distribution is accomplished by a holographic coupler. Other propagating modes are unaffected by the coupling region. This coupling method and apparatus has application when it is required to make multiple taps along a common optical fiber as well as when it is necessary to access individual fiber modes.

REFERENCES:
patent: 3777149 (1973-12-01), Marcatili
patent: 3809455 (1974-05-01), Pekau
patent: 3931518 (1976-01-01), Miller
K. Pennington and E. A. Ash, "Fast Wave Optical Guide Couplers Using Holophic Elements", IBM Tech Disc Bull., vol. 13, No. 8, Jan. 1971, 2280-2281.

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