Fiber Collimator Calibration by Reflected Power Maximization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for calibrating collimating lens systems in optical communication networks are inefficient and costly, often requiring expensive interferometers or wavefront sensors.
Innovation Solution
A method and system for calibrating a collimating lens system using a perfect flat mirror, an optical transmitter, and a power meter, where the beam is reflected back through the lens system, and the position of the optical fiber is adjusted to maximize power reception, thereby determining the optimal calibration position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If expensive interferometers or wavefront sensors are used for calibration, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces expensive, complex calibration equipment (interferometers and wavefront sensors) with a simple, inexpensive power meter and flat mirror. This substitution maintains sufficient calibration precision for the application while dramatically reducing device complexity and cost, embodying the principle of using cheaper alternatives when full measurement precision is not critical.
Solution Approach 2:
The patent extracts the essential calibration function from complex optical measurement systems and isolates it to a simple power-based feedback mechanism. By taking out only the necessary measurement capability (power detection) and eliminating unnecessary complexity (interference patterns, wavefront analysis), the system achieves practical calibration precision with minimal device complexity.
2Measurement precision
If manual calibration methods are used, then measurement precision can be achieved, but productivity decreases
Solution Approach 1:
The patent implements an automated feedback loop where the power meter continuously monitors the reflected beam power and provides real-time feedback to the positioning system. This enables automated adjustment of the optical fiber or lens position to maximize power reception, achieving both high calibration precision and improved productivity by eliminating manual trial-and-error calibration processes.
Solution Approach 2:
The patent replaces manual mechanical adjustment with automated motorized positioning controlled by feedback from the power meter. This substitution maintains measurement precision while dramatically improving productivity by enabling rapid, repeatable calibration across multiple production units without manual intervention.
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
This approach allows for precise calibration of collimating lens systems, achieving high power reception with reduced costs, as it utilizes a less expensive perfect flat mirror and can be automated for efficient production scaling.
Implementation Method 1
reflecting the beam off a perfect flat mirror positioned at an output of the collimating lens and back towards the collimating lens
Implementation Method 2
transmitting, using an optical transmitter, a beam out of an optical fiber and through a collimating lens of the collimating lens system
Data Source
AI summary
A method of calibrating a collimating lens system includes transmitting, using an optical transmitter, a beam out of an optical fiber and through a collimating lens of the collimating lens system. The beam is reflected off a perfect flat mirror positioned at an output of the collimating lens and back towards the collimating lens, and received, via the collimating lens, at a power meter connected to the optical fiber. The method also includes adjusting a position of a tip of the optical fiber proximal to the collimating lens while tracking a power reading using the power meter, selecting a calibration position of the optical fiber corresponding to a highest power reading, and securing the optical fiber relative to the collimating lens using the calibration position.