Optical Module Nonlinear Compensation for Lower Bit Error Rates
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Solution Overview
Problem
Optical networks in data centers face high bit error rates due to factors like optical attenuation, dispersion, and nonlinearity, necessitating improved optical communication technologies to optimize bandwidth, latency, power consumption, and reliability.
Innovation Solution
A communication apparatus that includes a storage unit for nonlinear compensation information, allowing flexible selection of optical modules with modulators, performs compensation based on modulator-specific information to reduce nonlinear distortion and bit error rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If optical networks are deployed to obtain high bandwidth and low latency, then network performance is improved, but bit error rate increases due to optical attenuation, dispersion, and nonlinearity
Solution Approach 1:
The patent applies preliminary anti-action by performing nonlinear compensation on the electrical signal before it is converted to optical signal. The communication apparatus pre-compensates for the nonlinear distortion that will be introduced by the modulator during optical conversion, thereby counteracting the harmful effects of optical nonlinearity, dispersion, and attenuation before they degrade the signal quality in the optical network
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting nonlinear compensation parameters based on the specific characteristics of different modulators. The system obtains modulator-specific nonlinear compensation information and modifies the compensation parameters to match the actual nonlinear characteristics of the connected modulator, thereby optimizing the compensation effect and reducing bit error rate while maintaining high bandwidth performance
2Reliability
If nonlinear compensation is performed using pre-stored information in the communication apparatus, then compensation is provided, but accuracy is insufficient due to variations in modulator types and vendors
Solution Approach 1:
The patent applies dynamics by making the nonlinear compensation system adaptive rather than static. The communication apparatus dynamically obtains nonlinear compensation information from the actually connected optical module, allowing the system to adapt to different modulator types and vendors. This dynamic adaptation ensures high compensation accuracy for each specific modulator while maintaining broad compatibility across various optical module configurations
Solution Approach 2:
The patent implements feedback by having the optical module provide its specific nonlinear compensation information back to the communication apparatus. The optical module feeds back its identifier and characteristics, enabling the communication apparatus to retrieve or determine the appropriate nonlinear compensation parameters tailored to that specific modulator, thereby achieving both high accuracy and broad adaptability
3Adaptability or versatility
If different types of modulators are used to meet diverse requirements, then versatility is improved, but nonlinear distortion varies greatly making compensation difficult
Solution Approach 1:
The patent applies local quality by providing customized nonlinear compensation parameters for each specific modulator type and vendor. Instead of using a single universal compensation parameter, the system obtains modulator-specific nonlinear compensation information that is tailored to the local characteristics of each optical module, thereby effectively compensating for the varying nonlinear distortion introduced by different modulator implementations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Accurate nonlinear compensation reduces bit error rates and optimizes optical communication performance by adapting to the unique characteristics of different modulators, enhancing signal quality, bandwidth, and power efficiency.
Implementation Method 1
The modulator is configured to modulate the electrical signal (or referred to as the electrical signal obtained through nonlinear compensation) input to the optical transmitter unit into an optical signal
Data Source
AI summary
This application discloses a system, a communication apparatus, an optical module, a method, and an optical network. The system may include a communication apparatus and an optical module. The communication apparatus includes a control module and a service module. The optical module includes a storage unit and an optical transmitter unit. The storage unit may store nonlinear compensation information of a modulator in the optical transmitter unit. After the optical transmitter unit is directly connected to the service module, the control module may read the nonlinear compensation information from the storage unit, and configure a nonlinear compensation coefficient of the service module based on the nonlinear compensation information. The service module sends an electrical signal to the optical transmitter unit based on the configured nonlinear compensation coefficient. The modulator modulates an electrical signal obtained through nonlinear compensation into an optical signal.