Miniaturized parallel optical transmitter and receiver module

• US 6,821,027 B2
• Filed: 10/30/2002
• Issued: 11/23/2004
• Est. Priority Date: 10/16/2000
• Status: Expired due to Fees

• Current Assignee: Opti Japan Corporation
• Original Assignee: Opti Japan Corporation
• Inventors: Lee, Hyung Jae, Son, Yung-Sung, Jin, Yong-Sung
• Primary Examiner(s): Kim, Ellen E.
• Application Number:
  US10/284,629
• Publication Number:
  US 20030091301A1
• Time in Patent Office: 755 Days
• Field of Search: 385/89-92, 385/94
• US Class Current: 385/89
• CPC Class Codes: G02B 6/4201 Packages, e.g. shape, construction, internal or external details
• CPC Class Codes: G02B 6/4203 Optical features
• CPC Class Codes: G02B 6/4239 Adhesive bonding; Encapsulation with polymer material
• CPC Class Codes: G02B 6/4243 Mounting of the optical light guide into a groove mounting optical light guides into a groove in general G02B6/3636
• CPC Class Codes: G02B 6/4249 comprising arrays of active devices and fibres
• CPC Class Codes: G02B 6/4261 Packages with mounting structures to be pluggable or detachable, e.g. having latches or rails
• CPC Class Codes: G02B 6/4277 Protection against electromagnetic interference [EMI], e.g. shielding means shielding of electric apparatus H05K9/00, of instruments G12B17/00
• CPC Class Codes: G02B 6/4281 the printed circuit boards being flexible in general H05K1/147
• CPC Class Codes: G02B 6/4283 with electrical insulation means
• CPC Class Codes: G02B 6/4284 of optical modules with disconnectable electrical connectors latching arms for electrical connectors H01R13/627

Abstract

The present invention relates to a module for parallel transmission and reception of an optical signals, and particularly a miniaturized module with a fixed optical coupler and a detachable electric connector is disclosed. A miniaturized optical signal transmission module according to the present invention comprises an electrical connector for coupling electric signals to a circuit board; an array of optical devices coupled to metal leads, the array of optical devices converting between optical signals and the electric signals; an optical fiber array block fixedly and optically coupled to the array of optical devices for transmitting the optical signals, wherein the metal leads are detachably coupled to the electrical connector part. The optical module can be miniaturized so that the entire system can be miniaturized. Accordingly, many advantages according to the miniaturization of the entire system can be obtained.

Claims

1. An optical transmission module, comprising:

an electrical connector for coupling electric signals to the optical transmission module, wherein the electrical connector includes a slot-type connector, and wherein the electrical connector has a deflectable flange with finger stop;

an optical device module detachably connectable to the electrical connector part and capable of making electrical connection with the electrical connector part so that the electrical signals are coupled to an array of optical devices mounted within the optical device module;

wherein the optical device module includes an elastomeric connector and a pair of trapezoidal handles outwardly extending from the optical device;

wherein an optical fiber array block having an array of optical fibers is fixedly mounted in a groove within the optical device module so that each optical fiber of the array of optical fibers is coupled to one optical device of the optical device module;

wherein the array of optical devices includes light emission devices comprising at least one of vertical cavity surface emitting laser diodes, edge-emitting laser diodes, and photodiodes;

wherein the optical fiber array and the optical fiber array block have a slant-processed face, the face of the optical fiber array being placed on the optical array to optically couple light between the optical device array and the optical fiber array, and wherein the slant-processed face of the optical fiber array block is a 45-degree mirrored surface;

wherein an optical adhesive is filled and cured on a portion at which a conductive wire extending from a metal lead coupleable to the electrical connector and the light emitting device array are bonded, and on a portion at which the light emitting device array and the optical fiber array are coupled;

a metal plate on which the array of optical devices is mounted;

a module cover for covering the optical device module, wherein the light emitting device array is fixedly and optically coupled with the optical fiber array block;

an optical connector optically coupling the array of optical fibers to a second array of optical fibers; and

a heat diffusing element located on an exterior of the optical device module and in thermal communication with the metal plate to permit transfer of heat from the optical device module to the heat defusing element via the metal plate.

2. An optical module, comprising:

an optical fiber array block for transmitting an optical signal;

an optical device fixedly and optically connected with the optical fiber array block and for converting between an optical signal transmitted by the optical fiber array block and an electrical signal;

an electrical connector detachable coupled to the optical device, and for coupling the electrical signal a circuit board;

wherein the optical fiber array block has a 45 degree slant-processed face, the face of the optical fiber array block being placed on a light-receiving array of the optical device to optically couple the light-receiving array of the optical device and the optical fiber array block;

wherein an optical adhesive is filled and cured on a portion at which conductive wire extended from metal leads to the optical device are bonded, and on a portion at which the light-receiving array of the optical device and the optical fiber array are coupled;

a metal plate in which the light-receiving array of the optical device is built;

a module base having a built-in groove in which the optical fiber array block is built;

a module cover for covering the module base, wherein the light-receiving device array is fixedly and optically connected with the optical fiber array block; and

a heat diffusing element located on an exterior of the module base and in thermal communication with metal plate to permit transfer of heat from the optical fiber array block to the heat diffusing element via the metal plate.

3. The optical signal reception module as claimed in claim 2, wherein an optical connector is additionally provided at an outer end of the optical fiber array block, so that an optical fiber array inside the block is optically connected to an optical fiber array outside the block.

4. The optical signal reception module as claimed in claim 2, wherein the optical device is coupled to an elastromeric connector.

5. The optical signal reception module as claimed in claim 2, wherein the electrical connector part includes a slot-type connector.