ModCon Mode Controller for Aerospace

The ModCon Mode Controller for Aerospace by Arden Photonics is a specialized passive mode conditioning device developed to support accurate, repeatable, and standards-compliant testing of multimode fiber optic systems used in aerospace applications. Designed to deliver controlled launch conditions independent of the light source being used, the ModCon helps eliminate one of the most significant sources of measurement uncertainty in multimode fiber testing.

Aerospace fiber optic networks demand exceptionally high levels of reliability and consistency. Whether testing aircraft communication systems, avionics networks, military platforms, or other mission-critical optical infrastructures, engineers must be confident that their measurements accurately reflect fiber performance rather than variations introduced by different test sources. The ModCon addresses this challenge by ensuring a consistent modal distribution is launched into the fiber under test, regardless of whether the source is an LED, laser, or another optical transmitter.

Available for both 50/125 µm and 62.5/125 µm graded-index multimode fiber, the ModCon Mode Controller for Aerospace can be supplied with FC, ST, SC, or LC connectors, allowing seamless integration into a wide range of aerospace test environments. By simply installing the ModCon between the test equipment and the fiber under test, users can achieve stable and repeatable launch conditions that support compliance with aerospace testing requirements, including the widely adopted 85/85 launch condition standard.

Measurements such as insertion loss and bandwidth are highly dependent on the modal characteristics of the light source. For example, results obtained using an OTDR can differ substantially from measurements carried out with a light source and power meter because the launch conditions generated by the respective sources are fundamentally different. The ModCon removes this variability by conditioning the optical signal before it enters the fiber, leading to improved agreement between different measurement techniques and greater confidence in test results.

Each ModCon is rigorously verified using Arden Photonics’ advanced MPX Modal Explorer technology to confirm that the device meets the required launch condition specifications independently of the incoming modal distribution. Optional documentation, including a Certificate of Conformance or a detailed Test Certificate with measurements at 850 nm and 1300 nm, is also available to support quality assurance and compliance programs.

Key Features

• Designed specifically for aerospace multimode fiber testing applications.
• Provides source-independent mode control, ensuring consistent launch conditions regardless of the light source used.
• Supports 85/85 launch condition compliance, as specified in various aerospace standards.
• Available for both 50/125 µm and 62.5/125 µm graded-index multimode fibers.
• Connector options include FC, ST, SC, and LC interfaces for maximum compatibility.
• Improves measurement accuracy by reducing source-dependent variations.
• Enhances agreement between different test methods, including OTDR and loss measurement systems.
• Passive design requires no electrical power, simplifying deployment and operation.
• Every unit is tested using the MPX Modal Explorer to verify compliance with launch condition requirements.
• Optional Certificate of Conformance and detailed Test Certificates are available.
• Supports measurements at both 850 nm and 1300 nm wavelengths.
• Also available in 70/70% Limited Phase Space configurations for specialized testing requirements.
• Enables stable and repeatable multimode fiber testing across manufacturing, maintenance, and qualification environments.

The aerospace version of the ModCon specifies launch performance through Near Field Pattern characteristics. The modal launch condition is defined by the width of the Near Field Pattern at 5%, 15%, and 75% of the maximum intensity. This approach provides a reliable and measurable method of ensuring compliance with aerospace testing standards while maintaining consistency across different test platforms and optical sources.

Applications

Aerospace Fiber Optic Network Testing Aircraft increasingly rely on fiber optic networks to support communication, control, sensing, and data transmission functions. The ModCon helps ensure accurate testing of these critical systems by providing controlled launch conditions that minimize measurement uncertainty.

Avionics System Validation Accurate insertion loss and bandwidth measurements are essential during the development and validation of avionics components. The ModCon improves repeatability and measurement consistency throughout qualification and acceptance testing procedures.

Production Testing and Quality Assurance Manufacturers of aerospace fiber optic assemblies can use the ModCon to standardize testing environments and reduce variability between production batches. Consistent modal launch conditions help facilitate reliable quality control processes and support compliance documentation.

Maintenance, Repair, and Overhaul (MRO) During routine maintenance and troubleshooting activities, engineers require dependable testing methods that deliver consistent results. The ModCon enables repeatable measurements regardless of the optical source employed, improving confidence in maintenance decisions.

Defense and Military Applications Military communication and sensing systems often operate under stringent performance requirements. The ModCon supports accurate verification of multimode fiber links used in defense platforms by ensuring stable and compliant launch conditions.

Research and Development Organizations developing next-generation aerospace fiber optic technologies can benefit from the ModCon's ability to reduce source-related measurement variations, enabling more reliable comparison of experimental results and system performance.

Why buy from AMS Technologies?

• Expert product selection and technical support
• Proven components from qualified suppliers
• Reliable European service and supply
• Custom engineering when standard products are not enough
• One partner from component to complete solution

What's next

The ModCon Mode Controller for Aerospace provides a practical and highly effective solution for achieving accurate, repeatable, and standards-compliant multimode fiber measurements in demanding aerospace environments. By delivering source-independent mode conditioning, it eliminates variations caused by differing light source characteristics and helps ensure that test results truly represent the performance of the fiber under evaluation.

Whether deployed in aircraft manufacturing, avionics validation, defense applications, maintenance operations, or research facilities, the ModCon supports improved measurement accuracy, stronger correlation between test methods, and compliance with established aerospace launch condition requirements. Its passive operation, flexible connector options, support for multiple fiber types, and rigorous factory verification make it an invaluable tool for organizations seeking dependable multimode fiber testing.

With the ability to simplify compliance, improve repeatability, and enhance confidence in measurement results, the ModCon Mode Controller for Aerospace is an essential component for modern aerospace optical test environments where precision, reliability, and consistency are critical.