Optical module implemented with tri-plexer optical subassembly
First Claim
1. An optical module capable of receiving an analog optical signal and a digital optical signal, and transmitting another digital optical signal, comprising:
- a tri-plexer optical subassembly that provides an analog module that receives said analog optical signal with a first wavelength, a bi-directional module that receives said digital optical signal with a second wavelength and transmits said another digital optical signal with a third wavelength and a WDM filter,wherein said bi-directional module has a single package different from a package of said analog module, said package of said bi-directional module commonly installing a semiconductor light-receiving device for receiving said digital optical signal and a semiconductor light-emitting device for emitting said another digital optical signal,wherein said WDM filter discriminates said first wavelength from said second and third wavelengths, andwherein said bi-directional module has an optical axis substantially perpendicular with an optical axis of said analog module;
a housing including a base made of resin and a metal shell that provides a frame ground;
a printed circuit board that installs a first electrical circuit coupled with said analog module and a second electrical circuit coupled with said bi-directional module, said first electrical circuit being electrically isolated from said second electrical circuit except for a signal ground of said optical module; and
a ground plate fixed to said bi-directional module and to said signal ground on said printed circuit board, said ground plate grounding said bi-directional module to said signal ground on said printed circuit board.
1 Assignment
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Accused Products
Abstract
An optical module that implements with a tri-plexer assembly is disclosed. The tri-plexer module comprises a bi-directional module for transmitting digital input and output signals and an analogue optical assembly for receiving analog optical signals. The bi-directional module installs both a light-emitting device and a light-receiving device in a signal package. The analogue optical assembly is assembled such that the optical axis thereof makes a substantially right angle with the optical axis of the bi-directional module. The signal ground of the module is common to the analogue module and to a section for receiving the digital data; while, the chassis ground or the frame ground in the module is isolated from the signal ground.
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Citations
10 Claims
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1. An optical module capable of receiving an analog optical signal and a digital optical signal, and transmitting another digital optical signal, comprising:
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a tri-plexer optical subassembly that provides an analog module that receives said analog optical signal with a first wavelength, a bi-directional module that receives said digital optical signal with a second wavelength and transmits said another digital optical signal with a third wavelength and a WDM filter, wherein said bi-directional module has a single package different from a package of said analog module, said package of said bi-directional module commonly installing a semiconductor light-receiving device for receiving said digital optical signal and a semiconductor light-emitting device for emitting said another digital optical signal, wherein said WDM filter discriminates said first wavelength from said second and third wavelengths, and wherein said bi-directional module has an optical axis substantially perpendicular with an optical axis of said analog module; a housing including a base made of resin and a metal shell that provides a frame ground; a printed circuit board that installs a first electrical circuit coupled with said analog module and a second electrical circuit coupled with said bi-directional module, said first electrical circuit being electrically isolated from said second electrical circuit except for a signal ground of said optical module; and a ground plate fixed to said bi-directional module and to said signal ground on said printed circuit board, said ground plate grounding said bi-directional module to said signal ground on said printed circuit board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification