Method and apparatus for side launch excitation of selected mode

Details Method and apparatus for side launch excitation of selected mode Method and apparatus for side launch excitation of selected mode

1979-10-15

1983-11-08

Lee, John D.

350320, G02B 5172

Patent

active

044138792

ABSTRACT:
An optical fiber having a parabolic-index profile is etched to a taper below the cladding layer. A prism contacts the taper along its length within the etched portion of the fiber, and coherent light is transmitted through the prism into the fiber. Selective control of the light beam entry angle, entry position along the taper, and control of the etching depth allows excitation of specific modes within the fiber and maximization of coupling efficiency.

REFERENCES:
patent: 3610727 (1971-10-01), Ulrich
patent: 3777149 (1973-12-01), Marcatili
patent: 3933455 (1976-01-01), Chown
patent: 4060308 (1977-11-01), Barnoski et al.
patent: 4125768 (1978-11-01), Jackson et al.
H. P. Hsu et al., "Single Mode Optical Fiber Pickoff Coupler" in Applied Optics, vol. 15, No. 10, Oct. 1976.

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