Optical Reflectometer Module Using Beat Signals in Test Instruments
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Solution Overview
Problem
Existing optical frequency domain reflectometers are standalone devices requiring specialized software and expertise, leading to increased costs and space usage, and there is a need for a customer-friendly solution to evaluate the reflection behavior of optoelectronic devices.
Innovation Solution
An optical frequency domain reflectometer module that connects to a test and/or measurement instrument, providing an add-on box with hardware functionality that generates and processes optical beat signals, allowing users to utilize existing instruments without additional software, and includes a pre-splitter and Mach-Zehnder-Interferometer for cost-effective and efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standalone reflectometer device is used, then the reflection behavior evaluation capability is provided, but the device complexity and cost increase due to requiring separate software and specialized hardware
Solution Approach 1:
The patent merges the reflectometer functionality into the existing test and measurement instrument by integrating an optical interface that couples to the instrument's signal path. The optical light source generates frequency-modulated light that travels through the device under test, and the reflected light is detected by a photodetector within the same instrument, combining multiple functions into a single integrated system rather than requiring separate standalone hardware and software components
Solution Approach 2:
The test and measurement instrument is designed to perform multiple functions: it can operate as a standard electrical signal analyzer and simultaneously function as an optical frequency domain reflectometer when the optical interface is engaged. The optical light source, circulator, and photodetector are integrated into the existing instrument architecture, allowing the same device to handle both electrical and optical measurement tasks without requiring entirely separate specialized equipment
2Reliability
If a standalone reflectometer device is used, then the reflection behavior evaluation capability is provided, but the cost increases due to requiring additional specialized equipment
Solution Approach 1:
The patent merges the reflectometer functionality into the existing test and measurement instrument by integrating an optical interface that couples to the instrument's signal path. The optical light source generates frequency-modulated light that travels through the device under test, and the reflected light is detected by a photodetector within the same instrument, combining multiple functions into a single integrated system rather than requiring separate standalone hardware and software components
Solution Approach 2:
The test and measurement instrument is designed to perform multiple functions: it can operate as a standard electrical signal analyzer and simultaneously function as an optical frequency domain reflectometer when the optical interface is engaged. The optical light source, circulator, and photodetector are integrated into the existing instrument architecture, allowing the same device to handle both electrical and optical measurement tasks without requiring entirely separate specialized equipment
3Reliability
If a standalone reflectometer device is used, then the reflection behavior evaluation capability is provided, but the space requirement increases due to requiring additional equipment
Solution Approach 1:
The patent merges the reflectometer functionality into the existing test and measurement instrument by integrating an optical interface that couples to the instrument's signal path. The optical light source generates frequency-modulated light that travels through the device under test, and the reflected light is detected by a photodetector within the same instrument, combining multiple functions into a single integrated system rather than requiring separate standalone hardware and software components
Solution Approach 2:
The test and measurement instrument is designed to perform multiple functions: it can operate as a standard electrical signal analyzer and simultaneously function as an optical frequency domain reflectometer when the optical interface is engaged. The optical light source, circulator, and photodetector are integrated into the existing instrument architecture, allowing the same device to handle both electrical and optical measurement tasks without requiring entirely separate specialized equipment
4Reliability
If a standalone reflectometer with specialized software is used, then the reflection behavior evaluation capability is provided, but the ease of operation decreases due to requiring expert knowledge
Solution Approach 1:
The test and measurement instrument is designed to perform multiple functions: it can operate as a standard electrical signal analyzer and simultaneously function as an optical frequency domain reflectometer when the optical interface is engaged. The optical light source, circulator, and photodetector are integrated into the existing instrument architecture, allowing the same device to handle both electrical and optical measurement tasks without requiring entirely separate specialized equipment
Solution Approach 2:
The system automatically processes the optical beat signal through the existing signal processing chain of the test instrument, generating reflection profiles without requiring manual intervention or specialized operating procedures. The integration allows the instrument to self-manage the complex signal processing and analysis functions that would otherwise require expert software operation
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
Enables efficient and cost-effective evaluation of optoelectronic devices by leveraging existing test and/or measurement instruments, reducing the need for specialized software and hardware, and allowing high-resolution measurements with improved usability and accuracy.
Implementation Method 1
an optical light source configured to generate an initial light signal that is a frequency modulated, FM, light signal
Implementation Method 2
The optical coupler, for instance a 3 dB coupler, is configured to process the second split signal and the optical return signal so as to provide an optical beat signal
Implementation Method 3
a Mach-Zehnder-Interferometer connected with the pre-splitter so as to receive the pre-split light signal from the pre-splitter, wherein the Mach-Zehnder-Interferometer is configured to process the pre-split light signal received from the pre-splitter, thereby generating a reference signal
Data Source
AI summary
The present disclosure relates to an optical frequency domain reflectometer module, which includes an optical light source configured to generate a frequency modulated light signal. A splitter is connected with the optical light source, which splits a light signal received into a first split signal and a second split signal. A circulator is connected with the splitter so as to receive the first split signal. An optical interface receives the first split signal from the circulator, wherein the optical interface also forwards an optical return signal to the circulator. An optical coupler receives the second spit signal from the splitter and the optical return signal from the circulator. The optical coupler processes the second spit signal and the optical return signal so as to provide an optical beat signal.