Waveguide type optical element

Details Waveguide type optical element Waveguide type optical element

2007-10-30

2007-10-30

Pak, Sung (Department: 2874)

Optical waveguides

Planar optical waveguide

Thin film optical waveguide

C385S129000, C385S131000

Reexamination Certificate

active

11063832

ABSTRACT:
A waveguide type optical element wherein Zn is selectively diffused on a light absorption layer using an undoped InP layer. Since an impurity diffusion area is made on the light absorption layer under a ridge part, a depletion layer becomes thin in a thickness direction and an electric field can strongly be applied. Thereby, an extinction ratio characteristic of a device can be improved.

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patent: 6242761 (2001-06-01), Fujimoto et al.
patent: 6541297 (2003-04-01), Takahashi
patent: 6590918 (2003-07-01), Mannou et al.
patent: 09199788 (1997-07-01), None
patent: 2000286507 (2000-10-01), None

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