Loss Compensation for Separated ASIC and Optical Module Interfaces
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Solution Overview
Problem
Existing coherent-detection optical modules face performance loss due to return interference and insert loss at the interfaces of connectors and internal wirings, particularly when the ASIC and optical transceiver are separated, with no effective solution available to mitigate these issues.
Innovation Solution
A loss compensation method and device that determine and apply compensation coefficients at both the transmitting and receiving ends using adaptive equalization algorithms and frequency response characteristics to pre-compensate digital signals before transmission, thereby reducing performance loss caused by return interference and insert loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the ASIC and optical transceiver are separated and connected by a connector, then the cost and flexibility of the optical module are improved, but return interference and insert loss occur at the connector interfaces causing performance degradation
Solution Approach 1:
The patent applies preliminary action by determining compensation coefficients before signal transmission and pre-compensating the digital signal at the transmitting end. The system determines first compensation coefficients based on connector characteristics, applies them to pre-compensate the digital signal, and also determines second compensation coefficients for post-compensation at the receiving end. This preliminary preparation of compensation parameters resolves the performance degradation caused by connector interfaces while maintaining the flexible separated architecture.
2Volume of moving object
If the ASIC and optical transceiver are separated, then the size and integration complexity of the optical module are reduced, but return interference and insert loss at connector interfaces cause performance loss
Solution Approach 1:
The patent determines compensation coefficients in advance based on connector characteristics and applies pre-compensation to the digital signal before transmission. The system calculates first compensation coefficients, applies them to pre-compensate the digital signal, and determines second compensation coefficients for post-compensation. This preliminary action approach resolves performance degradation while maintaining the compact separated architecture.
Solution Approach 2:
The patent applies parameter changes by modifying the digital signal parameters through compensation coefficients. The system determines compensation coefficients that characterize the connector's impact on signal transmission, then applies these coefficients to transform and compensate the digital signal parameters, thereby counteracting the performance degradation caused by connector interfaces.
3Reliability
If traditional optical modules are used with integrated ASIC and optical transceiver, then performance is maintained, but the module is large in size, high power consumption, and high cost
Solution Approach 1:
The patent applies segmentation by separating the ASIC and optical transceiver into independent modules connected by a connector. This segmentation allows each component to be optimized independently, reducing overall power consumption and cost while maintaining performance through the added compensation mechanism for connector-induced signal degradation.
Data Source
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AI summary
Disclosed are a loss compensation method and device. The method is applied to a scenario where an Application Specific Integrated Circuit (ASIC) and an optical module are separated, and the method includes: determining a first compensation coefficient of a transmitting end to equalize return interference and compensate for insert loss; pre-compensating a first digital signal based on the first compensation coefficient to obtain a first compensation signal, performing digital-to-analog conversion on the first compensation signal, and inputting the converted signal to an optical transceiver through a connector; determining a second compensation coefficient of a receiving end to equalize return interference and compensate for insert loss; and compensating a second digital signal at the receiving end based on the second compensation coefficient to obtain a second compensation signal, wherein the second digital signal is a signal obtained by performing analog-to-digital conversion on a signal outputted from the optical transceiver and transmitted through the connector.