High frequency emmitter and detector packaging scheme for 10GB/S transceiver
First Claim
1. An apparatus comprising:
- a substrate on which a light emitter and a light detector are mounted;
a first optical module adapted to optically couple light received from a first optical cable to the light detector, said first optical module including a first lens to collimate light received from the first optical cable and a second lens optically coupled to the first lens to focus received collimated light onto the light detector, said first optical module including a head portion;
a second optical module adapted to optically couple light produced by the light emitter to a second optical cable, said second optical module including a first lens to collimate light received from the light emitter and a second lens optically coupled to the first lens to direct light into the second optical cable, said second optical module including a head portion;
wherein each of the first and second optical modules comprise a single piece polymer structure;
a standoff fixedly mounted to the substrate, said standoff including two recesses defined therein, each said recess to engage the head portion of a respective optical module wherein at least one gap is formed between the head portion of each optical module and the respective recess, said gap to allow active alignment of an optical module wherein the optical module is positioned within the respective recess such that a maximum amount of light is optically coupled; and
epoxy disposed in said gap for fixedly securing the head portion of an optical module to a respective recess upon completion of said active alignment.
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Abstract
An apparatus and packaging scheme that ensures that alignments between signal sending and detecting components in transceivers are optimized and maintained over the lifetime of the apparatus. This is accomplished through use of a pair of polymer optical modules, which are used to couple light sent to and received from respective fiber optic cables. During a pre-alignment process, head portions of the polymer optical modules are inserted into respective slots defined in a standoff that is mounted on an optical sub-assembly to which an emitter and detector are mounted, whereby these slots are configured so that the head portions slide along the sidewalls of the slots during assembly. During a subsequent active alignment process, each polymer optical module is positioned relative to its respective emitter or detector until a maximum signal is detected, whereupon the position of the components is quick-set using a UV-sensitive adhesive.
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Citations
23 Claims
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1. An apparatus comprising:
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a substrate on which a light emitter and a light detector are mounted; a first optical module adapted to optically couple light received from a first optical cable to the light detector, said first optical module including a first lens to collimate light received from the first optical cable and a second lens optically coupled to the first lens to focus received collimated light onto the light detector, said first optical module including a head portion; a second optical module adapted to optically couple light produced by the light emitter to a second optical cable, said second optical module including a first lens to collimate light received from the light emitter and a second lens optically coupled to the first lens to direct light into the second optical cable, said second optical module including a head portion; wherein each of the first and second optical modules comprise a single piece polymer structure; a standoff fixedly mounted to the substrate, said standoff including two recesses defined therein, each said recess to engage the head portion of a respective optical module wherein at least one gap is formed between the head portion of each optical module and the respective recess, said gap to allow active alignment of an optical module wherein the optical module is positioned within the respective recess such that a maximum amount of light is optically coupled; and epoxy disposed in said gap for fixedly securing the head portion of an optical module to a respective recess upon completion of said active alignment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus comprising:
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a first light coupling means for optically coupling light received from a first optical cable to a light detector having an optical axis oriented approximately 90 degrees relative to an optical axis of the first optical cable, said first light coupling means including a head portion; a second light coupling means for optically coupling light produced by a light emitter to a second optical cable having an optical axis that is approximately 90 degrees relative to an optical axis of the light emitter, said second light coupling means including a head portion; wherein each of the first and second light coupling means comprice a single piece polymer structure; a substrate on which the light emitter and the light detector are mounted; means for fixedly coupling the first and second light coupling means to the substrate, wherein said means for fixedly coupling the first and second light coupling means includes a pair of recesses to engage the head portions of each respective light coupling means, wherein at least one gap is formed between the head portion of each light coupling means and the respective recess, said gap to allow active alignment of a light coupling means wherein the light coupling means is positioned within the respective recess such that a maximum amount of light is coupled; and epoxy disposed in said gap for fixedly securing the head portion of a light coupling means to a respective recess upon completion of said active alignment. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification