Optical Transceiver Eye Safety via Dynamic Power Control
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Solution Overview
Problem
Optical transceivers with collimated light sources pose a risk to eye safety due to high optical power, requiring safety measures like goggles and training for installers and repair personnel, as light can escape when fiber optic cables are disconnected.
Innovation Solution
An optical transceiver system that includes a photodetector and electronic processor to detect the presence or absence of a signal, adjusting the output power of the light source accordingly, reducing power when the cable is disconnected to prevent eye damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the optical transceiver outputs high optical power to transmit light through the fiber optic cable, then the transmission capability is improved, but the eye safety is worsened when the cable is disconnected
Solution Approach 1:
The patent implements dynamic optical power adjustment by switching between a first optical power level (when cable is connected) and a second optical power level (when cable is disconnected). The optical module continuously monitors cable connection status and adjusts output power accordingly, transforming the static high-power transmission system into a dynamic adaptive system that eliminates eye safety hazards while maintaining transmission capability.
Solution Approach 2:
The patent employs feedback control through an optical module that detects cable connection status and provides this information to the processor. The processor then adjusts the optical power output based on this feedback signal, creating a closed-loop control system that automatically maintains safe operating conditions while ensuring optimal transmission performance.
2Reliability
If the optical transceiver uses collimated light to improve transmission efficiency, then the signal quality is improved, but the eye safety classification is worsened
Solution Approach 1:
The patent maintains collimated light transmission for optimal signal quality when the cable is connected, but dynamically switches to a lower power mode when disconnected. This dynamic adaptation allows the system to enjoy the benefits of collimated light (improved signal quality and transmission efficiency) without permanently committing to high power levels that compromise eye safety.
3Reliability
If the optical transceiver maintains high optical power output to ensure reliable transmission, then the transmission reliability is improved, but the safety measures required are worsened
Solution Approach 1:
The patent implements self-service safety mechanisms where the optical transceiver automatically monitors its own cable connection status and adjusts its power output without external intervention. The system serves its own safety needs through built-in detection and control mechanisms, eliminating the need for external safety goggles, specialized training, and periodic eye examinations that would otherwise be required.
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 system effectively reduces the risk of eye damage by lowering the optical power when the fiber optic cable is disconnected, ensuring safer operating conditions for personnel and eliminating the need for constant safety gear and training.
Implementation Method 1
a first photodetector configured to output a signal indicative of a presence or absence of a second optical signal
Data Source
AI summary
Systems and methods for achieving eye safety of an optical transceiver are provided. An optical module can be configured to output a first optical signal. A first photodetector can be configured to output a signal indicative of a presence or absence of a second optical signal. A controller can be coupled to the optical module and the first photodetector and can be configured to control the output of the optical module. In response to a determination that an output of the first photodetector indicates the second optical signal is absent, the controller can control the optical module to output the first signal at a decreased average optical power. In response to a determination that an output of the first photodetector indicates the second optical signal is present, the controller can control the optical module to output the first signal at an increased average optical power.