Method and apparatus for variable attenuation of an optical wave

Details Method and apparatus for variable attenuation of an optical wave Method and apparatus for variable attenuation of an optical wave

1984-09-10

1988-01-26

Sikes, William L.

G02B 626

Patent

active

047213515

ABSTRACT:
A method and apparatus for variable attenuation of a flexible optical waveguide empart a variable curvature to the waveguide such that selected, conditioned radition losses result. In one embodiment the curvature is emparted by winding a portion of the waveguide around a grooved roller, in other embodiments the curvature is emparted by slides which are laterally moveable within curved recesses of a supporting frame, the slides engaging the waveguide and causing the waveguide to conform to varying portions of the curved recesses.

REFERENCES:
patent: 3982123 (1976-09-01), Goell et al.
patent: 4277134 (1981-07-01), Upton, Jr.
patent: 4557550 (1985-12-01), Beals et al.
"Curvature Loss Formula for Optical Fibers", Marcuse, J. Opt. Soc. Am., vol. 66, No. 3, Mar. 1976.
"Bends in Optical Dielectric Guides", Marcatili, Bell System Technical Journal, Sep. 1969.
"Analysis of Curved Optical Waveguides by Conformal Transformation, Heiblum et al., IEEE Journal of Quantum Electronics, vol. QE-11, No. 2, Feb. 1975.

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