Burst Mode Receiver TIA Coordination for Faster Signal Settling
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Solution Overview
Problem
Optical burst mode receivers in passive optical networks face challenges in coordinating the configuration of multiple transimpedance amplifiers due to variations and asymmetries, particularly in multi-channel technologies, leading to imperfect signal separation and decreased link performance.
Innovation Solution
An optical burst mode receiver system that determines parameters from a first TIA to configure other TIAs, using methods like averaging or threshold-based settings, to coordinate their configuration and compensate for static errors, thereby improving symmetry and settling time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple transimpedance amplifiers are used to receive burst mode signals from different ONUs, then the receiver can handle multiple channels simultaneously, but variations and asymmetries between amplifiers lead to imperfect signal separation and decreased link performance
Solution Approach 1:
The system uses feedback from a first TIA to configure subsequent TIAs. The controller receives parameters from the first TIA and uses this feedback to determine configuration settings for second and third TIAs, creating a feedback loop that ensures coordinated operation and compensates for variations between amplifiers
Solution Approach 2:
The invention dynamically adjusts configuration parameters of the TIAs based on received signal characteristics. The controller modifies gain, offset, and other parameters of subsequent TIAs based on parameters determined from the first TIA's operation, optimizing each amplifier's performance for its specific channel
2Device complexity
If each TIA is configured independently, then the system is simpler to implement, but coordination between amplifiers is poor leading to asymmetries and performance degradation
Solution Approach 1:
The system performs preliminary configuration of subsequent TIAs based on parameters from the first TIA before they process signals. The controller determines configuration settings for second and third TIAs in advance, ensuring they are properly coordinated with the first TIA before actual signal reception begins
Solution Approach 2:
The controller serves multiple functions: it receives parameters from the first TIA, determines configuration settings for subsequent TIAs, and coordinates their operation. This multi-functional approach reduces overall system complexity while achieving precise coordination between amplifiers
3Reliability
If dynamic configuration of TIAs is implemented to compensate for variations, then signal separation improves, but the settling time increases
Solution Approach 1:
The controller determines configuration settings for subsequent TIAs in advance, before signal reception begins. By pre-configuring the amplifiers based on parameters from the first TIA, the system eliminates the need for dynamic adjustment during operation, reducing settling time while maintaining signal separation quality
Solution Approach 2:
The system uses the parameters from the first TIA as a template to configure subsequent TIAs. The controller copies and adapts the configuration parameters from the first amplifier to subsequent amplifiers, ensuring consistent performance across all channels without requiring independent optimization for each
Data Source
AI summary
An optical burst mode receiver and methods of operation are disclosed. The optical burst mode receiver may comprise means for determining a first parameter associated with a first transimpedance amplifier, TIA, in response to the first TIA receiving a first burst mode signal, means for determining a configuration setting for at least a second, different, TIA based at least in part on the first parameter; and means for configuring at least the second TIA, for receiving a second burst mode signal, based at least in part on the configuration setting.