Integrated Optical Power Detection for EMI-Stable Signal Amplification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current optical power detectors require an external amplifier to amplify weak electrical signals, which are prone to interference from strong electromagnetic signals, leading to instability in the light emitting device and the need for costly and inefficient manual installation of metal shields.
Innovation Solution
An optical power detection apparatus that integrates an optical splitter, a photocell, and an electrical amplification module within a micro-shield, protecting the components from external interference and eliminating the need for external amplifiers and shields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If an external amplifier is used to amplify weak electrical signals from the photodetector, then the signal strength is improved, but the device becomes vulnerable to electromagnetic interference and requires additional shielding components
Solution Approach 1:
The patent combines the photodetector and amplifier into a single integrated module where the amplifier is directly coupled to the photodetector output. This integration eliminates the need for external amplifiers and associated shielding, as the signal is amplified immediately upon detection without exposure to external electromagnetic interference. The integrated design maintains signal strength while eliminating vulnerability to interference.
2Reliability
If a metal shield is added to protect against electromagnetic interference, then the reliability is improved, but the manufacturing complexity and cost increase due to manual installation
Solution Approach 1:
The patent integrates the shielding function directly into the module housing that encases the photodetector and amplifier. The housing is designed with electromagnetic shielding properties as an inherent feature rather than as a separate component requiring manual installation. This integration maintains reliability by protecting against interference while eliminating the need for additional assembly steps, thereby improving manufacturing efficiency.
3Measurement precision
If external amplifiers and shields are used, then the signal detection capability is improved, but the device complexity and cost increase
Solution Approach 1:
The patent merges the photodetector, amplifier, and shielding into a single integrated optical detection module. This consolidation reduces the total number of discrete components while maintaining optical signal detection capability. The integrated design eliminates the need for separate external amplifiers and shields, thereby reducing device complexity and assembly requirements while preserving measurement precision.
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
The integrated design enhances signal protection from external interference, improves sensitivity and integration, reduces material and labor costs, and ensures stable operation of the light emitting device.
Implementation Method 1
an optical splitter for splitting an input optical signal into a first optical signal and a second optical signal
Implementation Method 2
a photocell connected to an output end of the optical splitter for outputting the first optical signal, where the photocell receives the first optical signal output by the optical splitter and converts the first optical signal into a current signal
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
Disclosed is an optical power detection device, including: an optical splitter configured to split an input optical signal into a first optical signal and a second optical signal at a preset fixed proportion; a photocell connected to an output end of the optical splitter, the photocell being configured to convert the first optical signal into a current signal; an electrical amplification module connected to an output end of the photocell, the electrical amplification module being configured to convert the current signal into a voltage signal, and perform gain processing on and then output the voltage signal; and a micro-shield configured to encapsulate the photocell and the electrical amplification module.