Optical waveguides – With optical coupler – Input/output coupler
Patent
1990-06-07
1992-06-02
Gonzalez, Frank
Optical waveguides
With optical coupler
Input/output coupler
385 37, 385129, G02B 634
Patent
active
051194520
ABSTRACT:
A high efficiency prism coupling device that comprises a substrate, an optical waveguide layer disposed on the substrate, a gap adjuster layer disposed on the waveguide layer and a prism secured to the gap adjuster layer through a dielectric adhesive agent. The gap adjuster layer has a refractive index which is lower than that of the waveguide layer. The gap adjuster layer has a recess formed therein for guiding an incident beam to the waveguide layer through a bottom portion thereof. The adhesive agent is disposed in and around the recess and has a refractive index which is higher than that of the waveguide layer. The prism is made from a dielectric material and disposed above the recess of the gap adjuster layer through the adhesive agent. The prism has a refractive index which is higher than that of the waveguide layer. The incident beam is introduced from outside through the prism, the adhesive agent and the bottom portion of the recess to the waveguide layer.
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patent: 4637684 (1987-01-01), Tomita et al.
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patent: 4877301 (1989-10-01), Yokomori et al.
patent: 4932743 (1990-06-01), Isobe et al.
Aoki Magane
Fujita Syunsuke
Funato Hiroyoshi
Isobe Tami
Misawa Shigeyoshi
Gonzalez Frank
Heartney Phan T.
Ricoh & Company, Ltd.
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