Multi-branch microwave line for electro-optical devices

Details Multi-branch microwave line for electro-optical devices Multi-branch microwave line for electro-optical devices

1995-03-10

1996-05-07

Lee, John D.

Optical waveguides

With optical coupler

Particular coupling structure

385 45, 385 14, G02B 626

Patent

active

055154638

ABSTRACT:
An electro-optical device for controlling an optical signal in response to an electrical signal includes a substrate having an optical path in which at least two waveguide arms diverge from an input portion. Typically, the waveguide arms include parallel regions and include convergence to an output portion. An electrical transmission line having a desired electrical impedance is positioned relative to the substrate for selectively changing the indices of refraction of the waveguide arms. The transmission line is a multi-branch design, with the branches in a one-to-one correspondence with the waveguide arms, so that each signal branch is aligned relative to a corresponding waveguide arm to couple an index-affecting electrical field to the corresponding waveguide arm. Preferably, the waveguide arms have opposite poling polarities, with each poling polarity being perpendicular to the direction of light propagation through the waveguide arms. Thus, a push-pull effect is achieved when identical electrical fields are generated by the branches of the single transmission line.

REFERENCES:
patent: 4709978 (1987-12-01), Jackel
patent: 4843350 (1989-06-01), Nazarathy et al.
patent: 5111517 (1992-05-01), Riviere
patent: 5119447 (1992-06-01), Trisno
patent: 5119450 (1992-06-01), Ranganath et al.
patent: 5249243 (1993-09-01), Skeie
patent: 5267336 (1993-11-01), Sriram et al.
patent: 5283842 (1994-02-01), Hakogi et al.
patent: 5293436 (1994-03-01), Diemeer

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