The VFI Optical Fiber End-Face Interferometer
The VFI is an interferometric inspection system specifically designed for checking the surface quality and flatness of your cleaved, polished or lensed fibers. The VFI interferometer has proved itself in Research, Production and QA over and over and the feedback we get from users indicates that they value these features -
1) Superb optical quality - the VFI will give you high quality images of the ends of optical fibers to enable you to estimate their quality and flatness. You can see for yourself some interferograms taken using the system. Click on the image to the right to see more pictures taken using the VFI. Using a front panel switch you can select the two modes of operation – inspect and fringe - so you can check the flatness and the end quality of your cleaved, polished or lensed fiber end with one fiber insertion. This means reduced testing time.
We pride ourselves on the crisp end-face images which show every defect and on the high contrast fringe patterns which make it easy to estimate end angles. The 5Mpixel camera in the VFI helps to show every detail and gives ample digital zoom capability.
2) Purpose designed fiber handling - the range and flexibility of the fiber handling is crucial to the concept of the VFI. Arden's own fiber holders make the VFI easy to use and accurate; our third party adaptor plates help you integrate VFI inspection and interferometery into your critical cleaving and polishing operations. Arden's holders can take fibers with diameters from 125µm to 1200µm, so you won't need multiple pieces of equipment to see all your fiber types properly.
3) Flexible software - the VFI comes with an efficient software package which enables you to grab, save, and print images. This gives you the ability to record vital data and produce QA reports for internal use or to supply to customers. The report generator enables users to include up to 20 cleave images in one report along with comments. Other features include - intensity line profile, intensity histogram, auto-optimisation of intensity, end angle estimation, psuedo-color rendering, review stored images.
All our software is written in-house by Arden's engineers. Arden has a track record of adding software features suggested by customers and we will continue to do that so you can be sure that our products will stay up-to-date with the latest standards and algorithms.
Features and benefits
Accepts 125 to 1200µm fiber diameters
5Mpixel camera gives x6 digital zoom
Arden, Vytran and Fujikura holders
End angle estimation
Inspect and Fringe modes
Flat and angled ends
User calibration facility
Applications
Precision cleaver manufacture
Cleaver maintenance
Laser manufacture
Medical device manufacturing
Fiber R&D
Development and testing of angled cleaves and cleavers
Device pigtailing
The VFI-1200 - Cleave inspection for fiber of 125 to 1200 µm in diameter
The VFI-1200 will enable you to inspect fibers with diameters from 125µm to 1200µm.

| Part number | Description |
|---|---|
| VFI-1200 | Interferometric inspection system for fibers with diameters from 125 to 1200µm. Includes VFI-1200 optical unit; CD containing PC software; USB cable; power supply; user manual; tools. Computer and fiber holders not included. |
Also required - these items must be ordered separately
- Desktop or laptop computer
- Fiber holders - see below
- Adaptor plates for other types fo fiber holder
- Carrying case
- Service contracts
Note - Computer minimum system requirements
- Windows 2000 SP4, Windows XP SP3 or Windows 7 32bit
- Hi-Speed USB 2.0 port with full power (500mA)
- A processor with a clock frequency of at least 1.5GHz
- PCI VGA card with DirectDraw support
- DirectX 9.0 or higher
( We can supply a desktop or laptop computer with system software already installed )
The VFI-200
The VFI-200 performs much the same tasks as the VFI-1200 BUT it is optimised for the inspection of 125 µm diameter fibers. If you only need to look at telecom type fibers this is the unit for you as it's high native resolution makes it the highest magniifcation interferometer around.
| Part number | Description |
|---|---|
| VFI-200 | Interferometric inspection system for fibers with diameters of 125µm. Includes VFI-200 optical unit; VF-H0 fiber holder for 125 µm fibers; CD containing PC software; USB cable; power Supply; user manual; tools |
Also required - these items must be ordered separately
- Desktop or laptop computer
- Angled fiber holders if required - see below
- Adaptor plates for other types fo fiber holder
- Carrying case
- Service contracts
Note - Computer minimum system requirements
- Windows 2000 SP4, Windows XP SP3 or Windows 7 32bit
- Hi-Speed USB 2.0 port with full power (500mA)
- A processor with a clock frequency of at least 1.5GHz
- PCI VGA card with DirectDraw support
- DirectX 9.0 or higher
(We can supply a desktop or laptop computer with system software already installed)
Technical Specification
| VFI-1200 | VFI-200 | |
|---|---|---|
| Field of View | 1200 µm maximum with x1.5, x2, x3 and x6 digital zoom | 200 µm |
| Dims (mm) | 240W x 240D x 90H | 240W x 240D x 90H |
| Weight (kg) | 2.0 | 2.0 |
| Power supply | 12v in-line power supply | 12v in-line power supply |
| PC connection | Hi-Speed USB 2.0 | USB 2.0 |
| Resolution | Maximum Resolution 1920x1920 pixels | 1280 x 1024 pixels |
| Image format | 8-bit BMP | 8-bit BMP |
| Accuracy | < 0.1 ° | < 0.1 ° |
Fiber holders

Arden's own holders are designed for one job only - to accurately and conveniently hold fibers for interferometric end-face measurements. They hold the fiber close to the tip in a precision Vee-groove so there is no danger of fibers curling. The fiber is held gently but securely using a removable magnetic strip. Arden holders are machined from stainless steel so precisely that the VFI will hold it's calibration even when switching from holder to holder.
Perpendicular cleave holders
| Part number | Description |
|---|---|
| VF-H0 | Arden fiber holder for 125µm fiber, perpendicular cleave |
| VF-H0-200 | Arden fiber holder for 200µm fiber, perpendicular cleave |
| VF-H0-400 | Arden fiber holder for 400µm fiber, perpendicular cleave |
| VF-H0-600 | Arden fiber holder for 600µm fiber, perpendicular cleave |
| VF-H0-800 | Arden fiber holder for 800µm fiber, perpendicular cleave |
| VF-H0-1000 | Arden fiber holder for 1000µm fiber, perpendicular cleave |
| For other sizes contact Arden Photonics | |
Angled cleave holders
| Part number | Description |
|---|---|
| VF-H8 | Arden angled fiber holder for 125µm fiber, fiber tilted at 8 degrees |
| VF-H4 | Arden angled fiber holder for 125µm fiber, fiber tilted at 4 degrees |
| VF-H6 | Arden angled fiber holder for 125µm fiber, fiber tilted at 4 degrees |
| VF-H10 | Arden angled fiber holder for 125µm fiber, fiber tilted at 10 degrees |
| VF-H12 | Arden angled fiber holder for 125µm fiber, fiber tilted at 12 degrees |
| For other sizes contact Arden Photonics | |
Other fiber holders
Whilst Arden's own holders are purpose-made for the job, we recognise that often the VFI is used in conjuction with specialist precision splicing and cleaving equipment. So by using adpator plates the VFI can accomodate industry standard fiber holders from Vytran and Fujikura.
Please note - using third party fiber holders can help your work flow BUT they are designed to work with cleavers and splicers not interferometers. Therefore you will not be able to self-calibrate the VFI using these holders. If you want to check the calibration of the VFI you will need to use Arden's own holders.
If you want to use the VFI with another type of holder please contact us as our engineers may well be able to help design an adaptor plate to suit your requirement.
| Part number | Description |
|---|---|
| VF-AP-V01 | VFI adaptor plate to accommodate Vytran style fiber holders |
| VF-AP-F01 | VFI adaptor plate to accommodate Fujikura style fiber holders |
After sales services
Contact Arden Photonics for information on our comprehensive packages (extended warranties, calibration programs, software upgrades, etc.) and per-incident services (repair, calibration, etc.)
