Optical module and method of forming the optical module

Details Optical module and method of forming the optical module Optical module and method of forming the optical module

2005-01-25

2005-01-25

Ullah, Akm Enayet (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C385S037000, C385S049000, C385S051000, C359S019000, C359S034000

Reexamination Certificate

active

06847761

ABSTRACT:
An object beam divided by a light dividing means12is caused to enter a photo-refractive polymer layer6through an optical fiber23. On the other hand, a reference beam divided by the light dividing means12is irradiated on the photo-refractive polymer layer6through a lens13from the opposite side. In this manner, the object beam is superimposed on the reference beam in the photo-refractive polymer layer6to provide an interference fringe or pattern. Since a photo-refractive polymer has a specific characteristic whereby the refractive index changes according to the intensity of irradiation light and the change is fixed after the irradiation light is stopped, a diffraction grating5corresponding to the interference fringe is recorded on the photo-refractive polymer layer6. This diffraction grating5exhibits a specific characteristic whereby the object beam emitted from the optical fiber23is emitted in the direction of the reference beam.

REFERENCES:
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patent: 6591029 (2003-07-01), Lin et al.
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patent: 20040047558 (2004-03-01), Yasuda et al.
patent: 02-123301 (1990-05-01), None
patent: 09-006166 (1997-01-01), None

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