Optoelectronic Transfer Function Measurement via Periodic Signal Averaging
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Solution Overview
Problem
Current measurement devices are limited in measuring optoelectronic signals, requiring conversion of optical signals to electrical signals and struggling with noise accuracy, lacking the ability to conveniently measure transfer functions across optical and electrical signal paths.
Innovation Solution
A method and system using periodic excitation signals, noise filtering through averaging, and common laboratory devices like signal generators and oscilloscopes to calculate transfer functions of optoelectronic devices or channels, enabling measurement of electrical and optical signals without specialized equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If commonly-used test devices are used to measure transmission properties, then device complexity is reduced, but measurement precision deteriorates because these devices can only measure electrical signals and not optoelectronic signals directly
Solution Approach 1:
The patent introduces a periodic excitation source as an intermediary that injects known periodic signals into the device under test. This mediator enables the measurement system to characterize optoelectronic devices by analyzing how they respond to periodic inputs, allowing commonly-used test devices to measure optoelectronic transmission properties through periodic signal injection and response analysis
2Adaptability or versatility
If optical signals are converted to electrical signals for measurement, then measurement capability is improved, but device complexity increases due to requiring special optoelectronic measurement systems
Solution Approach 1:
The patent creates a universal measurement method that works across electrical, optoelectronic, and optical signal domains. By using periodic excitation sources and analyzing periodic responses, the same measurement system can characterize different types of signal transmissions without requiring domain-specific conversion equipment, achieving multi-functionality
3Measurement precision
If noise filtering is applied through averaging, then measurement precision is improved, but measurement time increases due to requiring multiple period sampling
Solution Approach 1:
The patent employs periodic excitation signals and samples the response over multiple periods, averaging the results to filter noise. The periodic nature of the excitation allows synchronized sampling at corresponding points across multiple cycles, enabling effective noise reduction through averaging while maintaining measurement efficiency
Data Source
AI summary
The present disclosure provides a method. The method comprises: Step S1: configuring a periodic excitation source to transmit a periodic excitation signal A; Step S2: sampling an output signal A+NA at an output point of the periodic excitation signal A with a sampling device AA, and averaging the output signal A+NA over one or more periods to filter noise; Step S3: inputting the sampled output signal A+NA as in input to a device or a channel H to be measured; Step S4: sampling an output signal B+NB at an output point of the device or the channel H to be measured with a sampling device BB, and averaging the output signal B+NB over one or more periods to filter noise; and Step S5: transmitting sampling results from the sampling device AA and the sampling device BB to an analysis software C to calculate a transfer function of the device or the channel H to be measured.