Optical device
AssigneeFujitsu Limited
InventorsTsuyoshi Aoki, Yasuo Yamagishi
Life of this patent
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Abstract
The optical device comprises a first substrate 10 having a control circuit formed on; optical waveguide layer 40 formed above the first substrate and having a refractive index changed by electro-optic effect; and second substrates 14a, 14b having prism electrodes 18 for applying voltages to the optical waveguide layer. The control circuit and the prism electrodes are electrically connected to each other via columnar conductors 20. Even in a case where thermal expansion coefficients of the control substrate and of the light deflection substrates are very different from each other, the pins are flexed corresponding to eternal forces, whereby junction is protected from being damaged in the joining processing. Thus, the optical switch can be highly reliable.
Claims18
An optical device comprising:
- a first substrate with a control circuit formed on;
- and
- a second substrate disposed above the first substrate and including an optical waveguide layer having a refractive index changed by electro-optic effect and a prism electrode which apply a voltage to the optical waveguide layer,
- the control circuit and the prism electrode being electrically connected by a columnar conductor.
Dependencies are inferred from the claim text.