Frequency selective interwaveguide coupler

Details Frequency selective interwaveguide coupler Frequency selective interwaveguide coupler

1976-01-07

1977-05-31

Corbin, John K.

350 96WG, G02B 514

Patent

active

040266320

ABSTRACT:
The coupler consists of an intermediate finite length waveguide located between a first and at least one second waveguide with the refractive index of the intermediate waveguide being greater than the refractive indices of the other waveguides. The intermediate waveguide further includes a structure which either in a fixed manner as by a surface relief, or in a controlled manner--as by electro-optic or acousto-optic perturbation, produces modes of propagation in the intermediate waveguide for a preselected frequency, such that energy may be coupled to or from the waveguides to the intermediate waveguide by mode matching and this energy may be converted from one mode to another in the intermediate waveguide.

REFERENCES:
patent: 3589794 (1971-06-01), Marcatili
patent: 3753157 (1973-08-01), Ash et al.
patent: 3850503 (1974-11-01), Riseberg et al.
patent: 3957341 (1976-05-01), Taylor

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