Optical module

Details Optical module Optical module

2007-12-18

2007-12-18

Kim, Ellen E. (Department: 2874)

Optical waveguides

With disengagable mechanical connector

Optical fiber to a nonfiber optical device connector

C385S092000

Reexamination Certificate

active

11510461

ABSTRACT:
An optical transmitter-receiver module has a structure in which a light-emitting device and a light-receiving device are coupled with an optical fiber through a wavelength-selecting filter. In the above structure, part of the lightwave of the light-emitting device is reflected from the wavelength-selecting filter, is reflected again from a wall in the opposite direction, and enters the light-receiving device, causing optical crosstalk between the light-emitting device and the light-receiving device. An object of the invention is to prevent the crosstalk between the light-emitting device and the light-receiving device. An inverted conical hole is provided in a wall at which the lightwave of the light-emitting device arrives after it is reflected from the wavelength selecting filter. The hole has a size larger than the spread of the reflected lightwave of the light-emitting device. The hole has a vertical angle of 72 to 80 degrees or 100 to 160 degrees.

REFERENCES:
patent: 5408559 (1995-04-01), Takahashi et al.
patent: 5838859 (1998-11-01), Butrie et al.
patent: 5867622 (1999-02-01), Miyasaka et al.
patent: 6106160 (2000-08-01), Kikuchi et al.
patent: 2006/0140546 (2006-06-01), Nakata et al.
patent: 2007/0009199 (2007-01-01), Yokino et al.
patent: 2004-012647 (2004-01-01), None

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