nPA-600 Refractive Index Profiler

The nPA-600 Refractive Index Profiler from Arden Photonics is a powerful measurement system designed to provide fast, accurate, and comprehensive analysis of optical fiber refractive index profiles. Using a modified refracted near-field technique, the instrument analyzes a fiber end-face and determines the full two-dimensional refractive index distribution, giving fiber manufacturers, researchers, and quality assurance teams the essential data needed to evaluate and optimize fiber performance.

As specialty optical fibers become increasingly sophisticated, precise characterization of refractive index profiles is critical for ensuring that designs perform as intended and manufacturing processes remain under control. The nPA-600 simplifies this task by delivering detailed refractive index measurements quickly and efficiently, enabling users to verify fiber designs, monitor production quality, and accelerate development cycles.

Designed for both laboratory and production environments, the nPA-600 combines advanced measurement capabilities with an intuitive user experience. The system is supplied with the production-ready nPA v4.0 software platform, which enhances measurement speed, expands customization possibilities, and improves operational efficiency. The software also provides a flexible API, allowing seamless integration with customer workflows, automated systems, and manufacturing environments.

One of the key advantages of the nPA-600 is its ability to measure optical fibers with diameters up to 600 μm. The instrument supports both circularly symmetric and non-circularly symmetric fiber designs, making it suitable for a wide variety of specialty fiber types, including polarization-maintaining (PM), octagonal, multicore, and other advanced fiber structures.

Speed is another major benefit. Fiber preparation and measurement can be completed in less than two minutes, while full 2D measurements are performed in only seconds. This rapid workflow allows engineers and production teams to obtain high-quality measurement data without slowing development or manufacturing processes.

The platform's functionality can be extended further through optional software plug-ins that introduce specialized measurement capabilities for single-mode fibers, PM fibers, bend-insensitive multimode (BIMM) fibers, and multicore fiber designs. Combined with its robust software environment and traceable recalibration options, the nPA-600 offers a future-ready solution for modern optical fiber characterization requirements.

Key Features

• Measures the full 2D refractive index distribution of optical fibers using a modified refracted near-field measurement technique.
• Supports fiber diameters up to 600 μm, making it suitable for a broad range of specialty fiber designs.
• Enables sample preparation and complete measurement in under two minutes, with 2D measurements completed in seconds.
• Measures both circularly symmetric and non-circularly symmetric fibers, including PM, octagonal, and multicore fiber designs.
• Supplied with production-ready nPA v4.0 software for enhanced productivity and advanced measurement control.
• Provides multiple measurement configuration options, including customizable refractive index scales and measurement areas.
• Supports flexible reporting with output options such as PDF measurement reports.
• Delivers faster measurement performance for smaller fibers and streamlines routine testing workflows.
• Includes customizable measurement templates for rapid comparison against target specifications and manufacturing tolerances.
• Offers an API that facilitates integration with custom software, automated manufacturing systems, and laboratory platforms.
• Supports in-field traceable recalibration using a dedicated calibration tool and an optional calibration fiber certified by the National Physical Laboratory (NPL) and Arden Photonics, eliminating the need to return the instrument for routine calibration.
• Optional software plug-ins extend functionality for specialized fiber geometries and measurement requirements. 

Optional Software Plug-ins

The nPA-600 platform can be expanded through dedicated software modules that provide advanced refractive index and geometry measurements for specialty fiber types:

• nPA-SPI01: Measures refractive index and geometry of Panda-style polarization-maintaining fibers with cladding diameters from 80 to 400 μm.
• nPA-SPI02: Measures refractive index and geometry of single-mode fibers with cladding diameters from 80 to 400 μm.
• nPA-SPI03: Measures refractive index and geometry parameters of bend-insensitive multimode (BIMM) fibers with 125 μm cladding diameter.
• nPA-SPI04: Measures refractive index and geometry of multicore fibers with cladding diameters from 40 to 600 μm.

Applications

The nPA-600 is ideal for specialty optical fiber design and development, providing the detailed refractive index information required to validate new fiber concepts and optimize performance characteristics. Researchers can use the system to evaluate complex fiber structures, compare design iterations, and ensure that manufactured fibers meet intended specifications.

In production environments, the instrument supports quality control and process monitoring by delivering rapid and repeatable measurements. Manufacturers can use the collected data to verify process consistency, detect deviations early, and maintain high product quality throughout production runs.

The system is also well suited for the characterization of polarization-maintaining fibers, multicore fibers, single-mode fibers, bend-insensitive multimode fibers, and other advanced specialty fiber designs. Its ability to measure both refractive index and geometry parameters makes it a versatile tool for a wide range of optical fiber technologies.

Academic institutions, industrial research laboratories, and fiber manufacturing facilities can all benefit from the nPA-600's combination of speed, accuracy, flexibility, and automation-ready integration capabilities.

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

As optical fiber technologies continue to evolve, accurate refractive index characterization remains essential for successful product development and manufacturing control. The nPA-600 Refractive Index Profiler provides a fast, reliable, and highly adaptable solution for obtaining the data needed to understand, optimize, and validate modern fiber designs.

With support for fibers up to 600 μm in diameter, advanced nPA v4.0 software, optional specialty measurement plug-ins, and seamless integration capabilities, the nPA-600 is designed to meet the needs of research laboratories, production facilities, and fiber developers alike. It delivers the measurement confidence required to accelerate innovation, improve quality assurance, and support the next generation of optical fiber technologies.