Optical waveguide and method of propagating waves therein

Details Optical waveguide and method of propagating waves therein Optical waveguide and method of propagating waves therein

1980-09-29

1983-08-30

Nussbaum, Marvin L

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

350 9633, 350 9615, 250227, G02B 5172, G02B 5176

Patent

active

044013639

ABSTRACT:
Conventional optical waveguides are of very small diameter making handling and coupling difficult. Also the HE.sub.11 mode is used and this can give rise to contamination where inhomogeneities arise in the waveguide. The waveguide of the present invention has a tube of higher permittivity optical material, with a core of lower permittivity optical material and cladding again of lower permittivity material. The critical dimension is the thickness of the tube and the tube diameter can therefore be made very much larger than that of the conventional optical waveguide. Such a waveguide when properly excited will support the HE.sub.11 wave as a single mode or alternatively the TE.sub.01 mode as a pure wave. Methods of launching and propagating these modes are described.

REFERENCES:
patent: 3386043 (1968-05-01), Marcatili et al.
patent: 3877912 (1975-04-01), Shiraishi et al.
patent: 3973828 (1976-08-01), Onoda et al.
Carome et al, "Optical Fiber Acoustic Sensor", Conference: Fiberoptics Advances in Research and Development, Kingston, R.I., U.S.A., 19-23 Jun. 1978; pp. 657-677.
"Tube Waveguide for Optical Transmission", by D. Marcuse and W. L. Mammel, The Bell System Technical Journal, vol. 52, No. 3, Mar. 1973, pp. 423-435.
"Cutoff Conditions in Three-Layer Cylindrical Dielectric Waveguides", by A. Safaai-Jazi and G. L. Yip, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-26, No. 11, Nov. 1978, pp. 898-903.
Bell System Technical Journal, May 1962, p. 1031, Abstract of Rowe/Warters article, "Transmission in Multiple Waveguide with Random Imperfections".
"Characteristics of a Doubly Clad Optical Fiber with a Low-Index Inner Cladding", Kawakami, et al., IEEE Journal of Quantum Electronics, Dec. 1974, pp. 879-887.

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