The Importance of Correctly Measuring Fiber Optic Patch Cords
Fiber optic patch cords are essential components in modern communication systems. They provide a means of connecting various fiber optic devices, such as transceivers and switches. To ensure the proper functionality and performance of these patch cords, it is crucial to measure them accurately. This article discusses the techniques and considerations for correctly measuring fiber optic patch cords.
1. Measuring Length
The length of a fiber optic patch cord is a critical parameter that needs to be measured with precision. To measure the length, follow these steps:
- Start by straightening the patch cord and removing any kinks or bends.
- Using a measuring tape or a length measurement tool, carefully measure the distance between the two connector ends of the patch cord.
- Make sure to take into account any excess cable coiled near the connectors.
It is important to perform this measurement accurately as any discrepancy in length can affect the performance and fit of the patch cord in the intended application.
2. Measuring Insertion Loss
Insertion loss is another crucial parameter to measure in fiber optic patch cords. It refers to the loss of power that occurs when the signal travels through the patch cord. To measure insertion loss:
- Connect one end of the patch cord to a stable and calibrated light source.
- Connect the other end to a power meter or an optical time-domain reflectometer (OTDR).
- Measure the received power and compare it to the transmitted power.
A higher insertion loss indicates poorer performance and signal degradation. Regular measurement of insertion loss ensures the patch cords meet the required specifications for optimal signal transmission.
3. Measuring Return Loss
Return loss is a measure of the amount of light reflected back towards the source due to inconsistencies in the patch cord. To measure return loss:
- Connect one end of the patch cord to an optical reflector or a fiber optic loopback connector.
- Connect the other end to an optical power meter.
- Measure the reflected power and calculate the return loss using the formula provided by the manufacturer.
A lower return loss indicates better performance and less signal reflection. Regular measurement of return loss ensures the patch cords maintain high signal quality.
Summary
Accurate measurement of fiber optic patch cords is essential for maintaining their performance and reliability. Length, insertion loss, and return loss are important parameters to measure. By following the correct measurement techniques outlined in this article, you can ensure the patch cords meet the required specifications and provide optimal signal transmission in fiber optic communication systems.
