PHOTOSENSITIVE OPTICAL FIBER
Fiber grating technology has enabled a whole host of optical components to be constructed within the fiber itself - with the resulting wavelength division multiplexers, narrow-band, high-reflectivity mirrors, wavelength-selective filters etc. solving problems and enhancing performance across a broad range of advanced telecommunications and sensor systems. Metroteks PS1250 and PS1550 have been developed to simplify the task of grating fabrication.
In the past, fiber have been 'photosensitised' either by increasing their germania content or by hydrogenation - neither technique is ideal. The small cores of high-germania fibers make them incompatible with standard communications fibers and the process of hydrogenation not only adds complexity and cost but also tends to produce high loss gratings after irradiation. Metroteks are different. Their boron-doped cores are intrinsically photosensitive - allowing gratings to be written without hydrogenation.
Specifications
| PS1250 | PS1500 | |
|---|---|---|
| Design Wavelength | 1300 nm | 1550 nm |
| Cut-off Wavelength | 1100 nm - 1300 nm | 1250 nm - 1500 nm |
| Numerical Aperture | 0.11 - 0.13 | |
| Outside Diameter (fiber) | 125 µm + 1% | |
| Outside Diameter (Coating) | 245 µm + 5% | |
| Proof-Test | 0.5% strain (50 kpsi) | |
Typical Performance1
| Induced Index Change | 0.002 |
|---|---|
| Grating Length | 15 mm |
| Irradiation Wavelength / Source | 248 nm, Excimer |
| Pulse Power Density | 0.5 Jcm -2 |
| Pulse Frequency | 20 Hz |
| Irradiation Duration | 10 minutes |
1. These figures are provided for guidance only and do not form part of the fiber specification.
Ordering Information: Photosensitive FiberTo order PS1250 or PS1500, simply specify the product code and length you need for your application. |
Metrotek
Phone: (727) 547-8307
Fax: (727) 547-0687
E-mail: fiberoptics@metrotek.com
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