Direct attach optical receiver module and method of testing
AssigneeGennum Corporation
InventorsImran Sherazi, Stephen Kovacic
Life of this patent
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Abstract
A direct attach optical receiver module and a system and method for testing the direct attach optical receiver module are provided. An optical receiver module may include an optical detector and an integrated circuit with an integrated amplifier circuit and at least one integrated capacitor. In one example, the optical detector may be physically attached to the integrated circuit and the output port of the optical detector may be electrically coupled to the input port of the integrated circuit. In another example, a redistribution layer that includes a tuning inductor may be being physically attached between the optical detector and the integrated circuit.
Claims15
An optical receiver module, comprising:
- an optical detector that includes a photosensor for receiving light and an output port for providing a photocurrent;
- an integrated circuit that includes an integrated amplifier circuit and at least one integrated capacitor, the integrated circuit including an input port for receiving the photocurrent;
- the optical detector being physically attached to the integrated circuit and the output port of the optical detector being electrically coupled to the input port of the integrated circuit;
- wherein the optical detector, integrated amplifier circuit and at least one integrated capacitor form a closed loop circuit in which the electrical connection between the output port of the optical detector and the input port of the integrated circuit provides substantially all of the inductance in the closed loop circuit.
An optical receiver module, comprising:
- an optical detector that includes a photosensor for receiving light and an output port for providing a photocurrent;
- an integrated circuit that includes an input port for receiving the photocurrent;
- and
- a redistribution layer that includes a tuning inductor, the redistribution layer being physically attached between the optical detector and the integrated circuit, and the tuning inductor being electrically coupled in series between the output port of the optical detector and the input port of the integrated circuit.
A method of manufacturing an optical receiver module, comprising:
- providing an integrated circuit that includes an input port for receiving the photocurrent;
- determining a desired inductance for the optical receiver module;
- fabricating a redistribution layer on the integrated circuit, the redistribution layer including a tuning inductor having an inductance value that is selected to achieve the desired inductance for the optical receiver module;
- and
- attaching an optical detector to the redistribution layer;
- the tuning inductor being electrically coupled in series between an output port of the optical detector and an input port of the integrated circuit.
A method of testing an optical receiver module, comprising:
- physically attaching an optical detector to an integrated circuit and electrically coupling an output port of the optical detector to an input port of the integrated circuit to form the optical receiver module such that the optical detector and the integrated circuit form a closed loop circuit in which the electrical connection between the output port of the optical detector and the input port of the integrated circuit provides substantially all of the inductance in the closed loop circuit;
- illuminating the optical detector with a light source;
- coupling a bias voltage to the integrated circuit;
- and
- determining a response to of the optical receiver module to evaluate a performance characteristic thereof.
Dependencies are inferred from the claim text.