Measure refractive index in seconds!
The nPA-400 is the quick, easy and low-cost way to get the refractive index data you need to verify your standard and specialty fibers.
Minimum fiber preparation is required, and the clean, efficient graphical user interface allows the user to fully characterise their fibers, with minimal training or experience. The nPA-400 provides accurate and repeatable refractive index data, giving valuable information about fiber design and the manufacturing process.
The nPA-400 Refractive Index Profiler uses a modified refracted nearfield technique to analyse the end-view grey-scale intensity profile of a fiber to determine its full 2D refractive index distribution.
There is no need to rotate the fiber or scan the fiber endface, resulting in a very fast measurement, meaning that the nPA-400 is suitable for production lines, research and development labs, or QA environments.
Features and Benefits
nPA-400 Refractive Index Profiler
| Graded index multimode fiber |  |
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| PANDA PM fiber |  |
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| PM fiber with elliptical stress rods |  |
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| 7-core multicore fiber |  |
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| Octagonal active fiber with pedestal surrounding the core |  |
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| Triple-clad fiber |  |
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| Repeatability* | |
|---|---|
| Refractive Index Repeatability | 0.0002 |
| Measurement Capability | |
|---|---|
| Fiber Diameter | up to 400 µm |
| Fiber Material | Silica glass |
| Measurement Time** | < 5 seconds |
| Measurement Range*** | +/- 0.025 |
| Optical | |
|---|---|
| Measurement Wavelength | 630nm |
| Field of View | 520 µm |
| Image Sensor | 1.1 inch CMOS, 12-bit 4096 x 3000 px resolution |
| Dynamic Range | 74 dB |
| Physical | |
|---|---|
| Weight | 6 kg |
| Size | 0.5 x 0.16 x 0.13 m |
| Operating Temp | 15 – 30° C |
| Performance Specification | Validated at 22° C |
| Computer Requirements | All systems are supplied with a computer running up-to-date Windows operating system. |
| Data Interface | 1 X USB 3.1 (USB A to USB B: 1m cable supplied) |
| Part number | Description |
|---|---|
| nPA-400 | Optical Fiber Refractive Index Profiler for full 2D measurement of optical fibers with diameters between 40 µm and 400 µm. Including optical unit, nPA-IL-1.4680 refractive index liquid kit, nPA-CS100 set of cover slips, nPA-FTK fiber test kit, nPA-CC rigid carrying case, nPA-F0270 and nPA-F0440 ferrule pins, cables, software package and APL-DC desktop computer |
| Ferrule Pins | |
| nPA-F0125 | nPA-400 Fiber guide assembly for optical fiber with outer diameter of up to 125 µm |
| nPA-F0230 | nPA-400 Fiber guide assembly for optical fiber with outer diameter of 125 – 230 µm |
| nPA-F0270 | nPA-400 Fiber guide assembly for optical fiber with outer diameter of 230 – 270 µm |
| nPA-F0440 | nPA-400 Fiber guide assembly for optical fiber with outer diameter of 270 – 440 µm |
| Optional Accessories | |
| nPA-IL-1.4680 | Bottle of Immersion liquid, 10 ml, ( Refractive Index = 1.4680, measured at 589 nm and 25°C ) for refilling nPA measurement cell assembly, including syringes and nozzles |
| nPA-SOC | Replacement oil cell for nPA-400 |
| nPA-CS100 | Set of 100 replacement cover slips for use with nPA-400 oil cell |
| nPA-CC | nPA-400 rigid carrying case |
| nPA-GUEW3 | nPA-400 Refractive Index Profiler extended warranty covering parts and labour for 3 years from purchase, return to base. Cover excludes camera |
| nPA-GUEW5 | nPA-400 Refractive Index Profiler extended warranty covering parts and labour for 5 years from purchase, return to base. Cover excludes camera |
