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US 2003/0156802 A1Published application
Optical module with simplex port cap EMI shield
AssigneeFinisar Corporation
InventorsChris Togami, Gary D. Sasser, Kai Ng
Life of this patent
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Abstract
An optical module has port housing comprised of a material that does not substantially shield EMI, such as an optical plastic. The port housings have a receiving ferrule disposed in an aperture of an electrically conductive shell. The ferrule is movably coupled to the shell to permit it to respond to loads imposed by an optical fiber connector and includes an electrically conductive cap to shield a portion of the port housing proximate the ferrule.
Claims20
An optical sub-assembly for an optical module, comprising:
- an optical port housing formed of a material that does not significantly shield electromagnetic interference, including:
- a body portion having a receptacle end and an optical coupling end;
- a head end having a bore shaped to receive an optical fiber;
- a neck portion connecting the body portion to the head end;
- an active optical device disposed in the receptacle end of the body portion of the optical port housing;
- and
- an electrically conductive cap disposed on the head portion of the port housing to reduce electromagnetic interference.
4 more elements
An optical transceiver or transponder module, comprising:
- a receiver optical sub-assembly having a first port housing comprised of a material that does not block electromagnetic interference, the first port housing having a first body portion at one end for housing an optical detector, a first head end having a first collar and a first bore for receiving a first optical fiber, and a first neck disposed between the first body portion and the first collar;
- a first electrically conductive cap disposed on the first collar of the first port housing;
- a transmitter optical sub-assembly having a second port housing comprised of a material that does not block electromagnetic interference, the second port housing having a second body portion at one end for housing a laser, a second head end having a second collar and a second bore for receiving a second optical fiber, and a second neck disposed between the second body portion and the second collar;
- a second electrically conductive cap disposed on the second collar of the second port housing;
- a conductive shell having an electronics section and an optical fiber connector end;
- an electrically conductive yoke disposed in the conductive shell proximate the connector end, the yoke shaped to fit about the neck portions of the optical sub-assemblies with the body portions disposed within the electronics section of the shell and the head ends disposed in the connector end;
- the first and second electrically conductive caps defining apertures for the emission of electromagnetic interference from the electronics section to the connector end.
4 more elements
An optical module, comprising;
- a first optical sub-assembly having a body portion, a neck portion, and a head portion, the head portion including a bore opening for receiving an optical fiber;
- a second optical sub-assembly having a body portion, a neck portion, and a head portion, the head portion including a bore opening for receiving an optical fiber;
- an electrically conductive yoke for movably coupling the neck portions of the first and second optical sub-assembly;
- a first electrically conductive cap disposed on the head portion of the first optical subassembly;
- a second electrically conductive cap disposed on the head portion of the second optical sub-assembly;
- the yoke and electrically conductive caps forming an electromagnetic interference shield in an optical fiber connector end of the module.
3 more elements
Dependencies are inferred from the claim text.